style.cpp revision 6405aaf88620c2c65e0340aa0d16b357cdf84ea6
#define __SP_STYLE_C__
/** \file
* SVG stylesheets implementation.
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Peter Moulder <pmoulder@mail.csse.monash.edu.au>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
* Copyright (C) 2005 Monash University
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "libcroco/cr-sel-eng.h"
#include "xml/croco-node-iface.h"
#include "svg/svg.h"
#include "svg/svg-color.h"
#include "svg/svg-icc-color.h"
#include "display/canvas-bpath.h"
#include "attributes.h"
#include "document.h"
#include "extract-uri.h"
#include "marker-status.h"
#include "uri-references.h"
#include "sp-paint-server.h"
#include "streq.h"
#include "strneq.h"
#include "style.h"
#include "svg/css-ostringstream.h"
#include "xml/repr.h"
#include "unit-constants.h"
#include "isnan.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
using Inkscape::CSSOStringStream;
using std::vector;
namespace Inkscape {
/**
* Parses a CSS url() specification; temporary hack until
* style stuff is redone.
* \param string the CSS string to parse
* \return a newly-allocated URL string (or NULL); free with g_free()
*/
gchar *parse_css_url(gchar const *string) {
if (!string)
return NULL;
gchar const *iter = string;
for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
if (strncmp(iter, "url(", 4))
return NULL;
iter += 4;
gchar const end_char = *iter;
if ( *iter == '"' || *iter == '\'' ) {
iter += 1;
}
GString *temp = g_string_new(NULL);
for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
if ( *iter == '(' || *iter == ')' ||
*iter == '"' || *iter == '\'' ||
g_ascii_isspace(*iter) ||
g_ascii_iscntrl(*iter) )
{
break;
}
if ( *iter == '\\' ) {
iter = g_utf8_next_char(iter);
}
if ( *iter & (gchar)0x80 ) {
break;
} else {
g_string_append_c(temp, *iter);
}
}
if ( *iter == end_char && end_char != ')' ) {
iter = g_utf8_next_char(iter);
}
gchar *result;
if ( *iter == ')' ) {
result = temp->str;
g_string_free(temp, FALSE);
} else {
result = NULL;
g_string_free(temp, TRUE);
}
return result;
}
}
#define BMAX 8192
class SPStyleEnum;
/*#########################
## FORWARD DECLARATIONS
#########################*/
static void sp_style_clear(SPStyle *style);
static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
static void sp_style_merge_ifilter(SPStyle *style, SPIFilter *child, SPIFilter const *parent);
static void sp_style_read_dash(SPStyle *style, gchar const *str);
static SPTextStyle *sp_text_style_new(void);
static void sp_text_style_clear(SPTextStyle *ts);
static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
static void sp_style_privatize_text(SPStyle *style);
static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
static void sp_style_read_istring(SPIString *val, gchar const *str);
static void sp_style_read_ilength(SPILength *val, gchar const *str);
static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
static void sp_style_read_ifilter(SPIFilter *f, gchar const *str, SPStyle *style, SPDocument *document);
static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
static gint sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key, SPILengthOrNormal const *const val, SPILengthOrNormal const *const base, guint const flags);
static gint sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key, SPITextDecoration const *const val, SPITextDecoration const *const base, guint const flags);
static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
static void css2_unescape_unquote(SPIString *val);
static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
static void sp_style_filter_clear(SPStyle *style, SPIFilter *filter);
#define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
#define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
#define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
#define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
#define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
#define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
#define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
struct SPStyleEnum {
gchar const *key;
gint value;
};
static SPStyleEnum const enum_fill_rule[] = {
{"nonzero", SP_WIND_RULE_NONZERO},
{"evenodd", SP_WIND_RULE_EVENODD},
{NULL, -1}
};
static SPStyleEnum const enum_stroke_linecap[] = {
{"butt", SP_STROKE_LINECAP_BUTT},
{"round", SP_STROKE_LINECAP_ROUND},
{"square", SP_STROKE_LINECAP_SQUARE},
{NULL, -1}
};
static SPStyleEnum const enum_stroke_linejoin[] = {
{"miter", SP_STROKE_LINEJOIN_MITER},
{"round", SP_STROKE_LINEJOIN_ROUND},
{"bevel", SP_STROKE_LINEJOIN_BEVEL},
{NULL, -1}
};
static SPStyleEnum const enum_font_style[] = {
{"normal", SP_CSS_FONT_STYLE_NORMAL},
{"italic", SP_CSS_FONT_STYLE_ITALIC},
{"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
{NULL, -1}
};
static SPStyleEnum const enum_font_size[] = {
{"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
{"x-small", SP_CSS_FONT_SIZE_X_SMALL},
{"small", SP_CSS_FONT_SIZE_SMALL},
{"medium", SP_CSS_FONT_SIZE_MEDIUM},
{"large", SP_CSS_FONT_SIZE_LARGE},
{"x-large", SP_CSS_FONT_SIZE_X_LARGE},
{"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
{"smaller", SP_CSS_FONT_SIZE_SMALLER},
{"larger", SP_CSS_FONT_SIZE_LARGER},
{NULL, -1}
};
static SPStyleEnum const enum_font_variant[] = {
{"normal", SP_CSS_FONT_VARIANT_NORMAL},
{"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
{NULL, -1}
};
static SPStyleEnum const enum_font_weight[] = {
{"100", SP_CSS_FONT_WEIGHT_100},
{"200", SP_CSS_FONT_WEIGHT_200},
{"300", SP_CSS_FONT_WEIGHT_300},
{"400", SP_CSS_FONT_WEIGHT_400},
{"500", SP_CSS_FONT_WEIGHT_500},
{"600", SP_CSS_FONT_WEIGHT_600},
{"700", SP_CSS_FONT_WEIGHT_700},
{"800", SP_CSS_FONT_WEIGHT_800},
{"900", SP_CSS_FONT_WEIGHT_900},
{"normal", SP_CSS_FONT_WEIGHT_NORMAL},
{"bold", SP_CSS_FONT_WEIGHT_BOLD},
{"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
{"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
{NULL, -1}
};
static SPStyleEnum const enum_font_stretch[] = {
{"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
{"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
{"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
{"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
{"normal", SP_CSS_FONT_STRETCH_NORMAL},
{"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
{"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
{"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
{"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
{"narrower", SP_CSS_FONT_STRETCH_NARROWER},
{"wider", SP_CSS_FONT_STRETCH_WIDER},
{NULL, -1}
};
static SPStyleEnum const enum_text_align[] = {
{"start", SP_CSS_TEXT_ALIGN_START},
{"end", SP_CSS_TEXT_ALIGN_END},
{"left", SP_CSS_TEXT_ALIGN_LEFT},
{"right", SP_CSS_TEXT_ALIGN_RIGHT},
{"center", SP_CSS_TEXT_ALIGN_CENTER},
{"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
{NULL, -1}
};
static SPStyleEnum const enum_text_transform[] = {
{"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
{"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
{"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
{"none", SP_CSS_TEXT_TRANSFORM_NONE},
{NULL, -1}
};
static SPStyleEnum const enum_text_anchor[] = {
{"start", SP_CSS_TEXT_ANCHOR_START},
{"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
{"end", SP_CSS_TEXT_ANCHOR_END},
{NULL, -1}
};
static SPStyleEnum const enum_direction[] = {
{"ltr", SP_CSS_DIRECTION_LTR},
{"rtl", SP_CSS_DIRECTION_RTL},
{NULL, -1}
};
static SPStyleEnum const enum_block_progression[] = {
{"tb", SP_CSS_BLOCK_PROGRESSION_TB},
{"rl", SP_CSS_BLOCK_PROGRESSION_RL},
{"lr", SP_CSS_BLOCK_PROGRESSION_LR},
{NULL, -1}
};
static SPStyleEnum const enum_writing_mode[] = {
/* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
* input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
* value is lr-tb rather than lr.
*
* ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
* sharing enumerators for different strings may be a bug (once we support ecma script).
*/
{"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
{"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
{"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
{"lr", SP_CSS_WRITING_MODE_LR_TB},
{"rl", SP_CSS_WRITING_MODE_RL_TB},
{"tb", SP_CSS_WRITING_MODE_TB_RL},
{NULL, -1}
};
static SPStyleEnum const enum_visibility[] = {
{"hidden", SP_CSS_VISIBILITY_HIDDEN},
{"collapse", SP_CSS_VISIBILITY_COLLAPSE},
{"visible", SP_CSS_VISIBILITY_VISIBLE},
{NULL, -1}
};
static SPStyleEnum const enum_overflow[] = {
{"visible", SP_CSS_OVERFLOW_VISIBLE},
{"hidden", SP_CSS_OVERFLOW_HIDDEN},
{"scroll", SP_CSS_OVERFLOW_SCROLL},
{"auto", SP_CSS_OVERFLOW_AUTO},
{NULL, -1}
};
static SPStyleEnum const enum_display[] = {
{"none", SP_CSS_DISPLAY_NONE},
{"inline", SP_CSS_DISPLAY_INLINE},
{"block", SP_CSS_DISPLAY_BLOCK},
{"list-item", SP_CSS_DISPLAY_LIST_ITEM},
{"run-in", SP_CSS_DISPLAY_RUN_IN},
{"compact", SP_CSS_DISPLAY_COMPACT},
{"marker", SP_CSS_DISPLAY_MARKER},
{"table", SP_CSS_DISPLAY_TABLE},
{"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
{"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
{"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
{"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
{"table-row", SP_CSS_DISPLAY_TABLE_ROW},
{"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
{"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
{"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
{"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
{NULL, -1}
};
static SPStyleEnum const enum_shape_rendering[] = {
{"auto", 0},
{"optimizeSpeed", 0},
{"crispEdges", 0},
{"geometricPrecision", 0},
{NULL, -1}
};
static SPStyleEnum const enum_color_rendering[] = {
{"auto", 0},
{"optimizeSpeed", 0},
{"optimizeQuality", 0},
{NULL, -1}
};
static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
static SPStyleEnum const enum_text_rendering[] = {
{"auto", 0},
{"optimizeSpeed", 0},
{"optimizeLegibility", 0},
{"geometricPrecision", 0},
{NULL, -1}
};
static SPStyleEnum const enum_enable_background[] = {
{"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
{"new", SP_CSS_BACKGROUND_NEW},
{NULL, -1}
};
/**
* Release callback.
*/
static void
sp_style_object_release(SPObject *object, SPStyle *style)
{
style->object = NULL;
}
/**
* Returns a new SPStyle object with settings as per sp_style_clear().
*/
SPStyle *
sp_style_new()
{
SPStyle *const style = g_new0(SPStyle, 1);
style->refcount = 1;
style->object = NULL;
style->text = sp_text_style_new();
style->text_private = TRUE;
sp_style_clear(style);
style->cloned = false;
style->fill_hreffed = false;
style->stroke_hreffed = false;
style->filter_hreffed = false;
new (&style->release_connection) sigc::connection();
new (&style->fill_release_connection) sigc::connection();
new (&style->fill_modified_connection) sigc::connection();
new (&style->stroke_release_connection) sigc::connection();
new (&style->stroke_modified_connection) sigc::connection();
return style;
}
/**
* Creates a new SPStyle object, and attaches it to the specified SPObject.
*/
SPStyle *
sp_style_new_from_object(SPObject *object)
{
g_return_val_if_fail(object != NULL, NULL);
g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
SPStyle *style = sp_style_new();
style->object = object;
style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
if (object && SP_OBJECT_IS_CLONED(object)) {
style->cloned = true;
}
return style;
}
/**
* Increase refcount of style.
*/
SPStyle *
sp_style_ref(SPStyle *style)
{
g_return_val_if_fail(style != NULL, NULL);
g_return_val_if_fail(style->refcount > 0, NULL);
style->refcount += 1;
return style;
}
/**
* Decrease refcount of style with possible destruction.
*/
SPStyle *
sp_style_unref(SPStyle *style)
{
g_return_val_if_fail(style != NULL, NULL);
g_return_val_if_fail(style->refcount > 0, NULL);
style->refcount -= 1;
if (style->refcount < 1) {
style->release_connection.disconnect();
style->release_connection.~connection();
if (style->text) sp_text_style_unref(style->text);
sp_style_paint_clear(style, &style->fill);
sp_style_paint_clear(style, &style->stroke);
sp_style_filter_clear(style, &style->filter);
style->fill_release_connection.disconnect();
style->fill_release_connection.~connection();
style->fill_modified_connection.disconnect();
style->fill_modified_connection.~connection();
style->stroke_release_connection.disconnect();
style->stroke_release_connection.~connection();
style->stroke_modified_connection.disconnect();
style->stroke_modified_connection.~connection();
g_free(style->stroke_dash.dash);
g_free(style);
}
return NULL;
}
/**
* Reads the various style parameters for an object from repr.
*/
static void
sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
{
g_assert(style != NULL);
g_assert(repr != NULL);
g_assert(!object || (SP_OBJECT_REPR(object) == repr));
sp_style_clear(style);
if (object && SP_OBJECT_IS_CLONED(object)) {
style->cloned = true;
}
/* 1. Style itself */
gchar const *val = repr->attribute("style");
if (val != NULL) {
sp_style_merge_from_style_string(style, val);
}
if (object) {
sp_style_merge_from_object_stylesheet(style, object);
} else {
/** \todo No stylesheet information. Find out under what circumstances
* this occurs, and handle accordingly. (If we really wanted to, we
* could probably get stylesheets by going through repr->doc.)
*/
}
/* 2. Presentation attributes */
/* CSS2 */
SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
/* Font */
SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
/* Text (css2 chapter 16) */
SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
if (!style->text_decoration.set) {
val = repr->attribute("text-decoration");
if (val) {
sp_style_read_itextdecoration(&style->text_decoration, val);
}
}
if (!style->line_height.set) {
val = repr->attribute("line-height");
if (val) {
sp_style_read_ilengthornormal(&style->line_height, val);
}
}
if (!style->letter_spacing.set) {
val = repr->attribute("letter-spacing");
if (val) {
sp_style_read_ilengthornormal(&style->letter_spacing, val);
}
}
if (!style->word_spacing.set) {
val = repr->attribute("word-spacing");
if (val) {
sp_style_read_ilengthornormal(&style->word_spacing, val);
}
}
SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
/* SVG */
SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
enum_writing_mode, true);
SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
enum_text_anchor, true);
/* opacity */
if (!style->opacity.set) {
val = repr->attribute("opacity");
if (val) {
sp_style_read_iscale24(&style->opacity, val);
}
}
/* color */
if (!style->color.set) {
val = repr->attribute("color");
if (val) {
sp_style_read_icolor(&style->color, val, style, ( object
? SP_OBJECT_DOCUMENT(object)
: NULL ));
}
}
/* fill */
if (!style->fill.set) {
val = repr->attribute("fill");
if (val) {
sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
}
}
/* fill-opacity */
if (!style->fill_opacity.set) {
val = repr->attribute("fill-opacity");
if (val) {
sp_style_read_iscale24(&style->fill_opacity, val);
}
}
/* fill-rule */
SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
/* stroke */
if (!style->stroke.set) {
val = repr->attribute("stroke");
if (val) {
sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
}
}
SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
/* markers */
if (!style->marker[SP_MARKER_LOC].set) {
val = repr->attribute("marker");
if (val) {
sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
}
}
if (!style->marker[SP_MARKER_LOC_START].set) {
val = repr->attribute("marker-start");
if (val) {
sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
}
}
if (!style->marker[SP_MARKER_LOC_MID].set) {
val = repr->attribute("marker-mid");
if (val) {
sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
}
}
if (!style->marker[SP_MARKER_LOC_END].set) {
val = repr->attribute("marker-end");
if (val) {
sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
}
}
/* stroke-opacity */
if (!style->stroke_opacity.set) {
val = repr->attribute("stroke-opacity");
if (val) {
sp_style_read_iscale24(&style->stroke_opacity, val);
}
}
if (!style->stroke_dasharray_set) {
val = repr->attribute("stroke-dasharray");
if (val) {
sp_style_read_dash(style, val);
}
}
if (!style->stroke_dashoffset_set) {
/* fixme */
val = repr->attribute("stroke-dashoffset");
if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
style->stroke_dashoffset_set = TRUE;
} else {
style->stroke_dashoffset_set = FALSE;
}
}
/* font-family */
if (!style->text_private || !style->text->font_family.set) {
val = repr->attribute("font-family");
if (val) {
if (!style->text_private) sp_style_privatize_text(style);
sp_style_read_istring(&style->text->font_family, val);
css2_unescape_unquote(&style->text->font_family);
}
}
/* filter effects */
if (!style->filter.set) {
val = repr->attribute("filter");
if (val) {
sp_style_read_ifilter(&style->filter, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
}
}
SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
"enable-background", enum_enable_background, true);
/* 3. Merge from parent */
if (object) {
if (object->parent) {
sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
}
} else {
if (sp_repr_parent(repr)) {
/// \todo fixme: This is not the prettiest thing (Lauris)
SPStyle *parent = sp_style_new();
sp_style_read(parent, NULL, sp_repr_parent(repr));
sp_style_merge_from_parent(style, parent);
sp_style_unref(parent);
}
}
}
/**
* Read style properties from object's repr.
*
* 1. Reset existing object style
* 2. Load current effective object style
* 3. Load i attributes from immediate parent (which has to be up-to-date)
*/
void
sp_style_read_from_object(SPStyle *style, SPObject *object)
{
g_return_if_fail(style != NULL);
g_return_if_fail(object != NULL);
g_return_if_fail(SP_IS_OBJECT(object));
Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
g_return_if_fail(repr != NULL);
sp_style_read(style, object, repr);
}
/**
* Read style properties from repr only.
*/
void
sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
{
g_return_if_fail(style != NULL);
g_return_if_fail(repr != NULL);
sp_style_read(style, NULL, repr);
}
/**
*
*/
static void
sp_style_privatize_text(SPStyle *style)
{
SPTextStyle *text = style->text;
style->text = sp_text_style_duplicate_unset(style->text);
sp_text_style_unref(text);
style->text_private = TRUE;
}
/**
* Merge property into style.
*
* Should be called in order of highest to lowest precedence.
* E.g. for a single style string, call from the last declaration to the first,
* as CSS says that later declarations override earlier ones.
*
* \pre val != NULL.
*/
static void
sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
{
g_return_if_fail(val != NULL);
switch (id) {
/* CSS2 */
/* Font */
case SP_PROP_FONT_FAMILY:
if (!style->text_private) sp_style_privatize_text(style);
if (!style->text->font_family.set) {
sp_style_read_istring(&style->text->font_family, val);
css2_unescape_unquote(&style->text->font_family);
}
break;
case SP_PROP_FONT_SIZE:
SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
break;
case SP_PROP_FONT_SIZE_ADJUST:
if (strcmp(val, "none") != 0) {
g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
}
break;
case SP_PROP_FONT_STYLE:
SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
break;
case SP_PROP_FONT_VARIANT:
SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
break;
case SP_PROP_FONT_WEIGHT:
SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
break;
case SP_PROP_FONT_STRETCH:
SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
break;
case SP_PROP_FONT:
if (!style->text_private) sp_style_privatize_text(style);
if (!style->text->font.set) {
g_free(style->text->font.value);
style->text->font.value = g_strdup(val);
style->text->font.set = TRUE;
style->text->font.inherit = (val && !strcmp(val, "inherit"));
}
break;
/* Text */
case SP_PROP_TEXT_INDENT:
SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
break;
case SP_PROP_TEXT_ALIGN:
SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
break;
case SP_PROP_TEXT_DECORATION:
if (!style->text_decoration.set) {
sp_style_read_itextdecoration(&style->text_decoration, val);
}
break;
case SP_PROP_LINE_HEIGHT:
if (!style->line_height.set) {
sp_style_read_ilengthornormal(&style->line_height, val);
}
break;
case SP_PROP_LETTER_SPACING:
if (!style->letter_spacing.set) {
sp_style_read_ilengthornormal(&style->letter_spacing, val);
}
break;
case SP_PROP_WORD_SPACING:
if (!style->word_spacing.set) {
sp_style_read_ilengthornormal(&style->word_spacing, val);
}
break;
case SP_PROP_TEXT_TRANSFORM:
SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
break;
/* Text (css3) */
case SP_PROP_DIRECTION:
SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
break;
case SP_PROP_BLOCK_PROGRESSION:
SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
break;
case SP_PROP_WRITING_MODE:
SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
break;
case SP_PROP_TEXT_ANCHOR:
SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
break;
/* Text (unimplemented) */
case SP_PROP_TEXT_RENDERING: {
/* Ignore the hint. */
SPIEnum dummy;
SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
break;
}
case SP_PROP_ALIGNMENT_BASELINE:
g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
break;
case SP_PROP_BASELINE_SHIFT:
g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
break;
case SP_PROP_DOMINANT_BASELINE:
g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
break;
case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
break;
case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
break;
case SP_PROP_KERNING:
g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
break;
/* Misc */
case SP_PROP_CLIP:
g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
break;
case SP_PROP_COLOR:
if (!style->color.set) {
sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
}
break;
case SP_PROP_CURSOR:
g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
break;
case SP_PROP_DISPLAY:
SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
break;
case SP_PROP_OVERFLOW:
/** \todo
* FIXME: not supported properly yet, we just read and write it,
* but act as if it is always "display".
*/
SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
break;
case SP_PROP_VISIBILITY:
SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
break;
/* SVG */
/* Clip/Mask */
case SP_PROP_CLIP_PATH:
g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
break;
case SP_PROP_CLIP_RULE:
g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
break;
case SP_PROP_MASK:
g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
break;
case SP_PROP_OPACITY:
if (!style->opacity.set) {
sp_style_read_iscale24(&style->opacity, val);
}
break;
case SP_PROP_ENABLE_BACKGROUND:
SPS_READ_IENUM_IF_UNSET(&style->enable_background, val,
enum_enable_background, true);
break;
/* Filter */
case SP_PROP_FILTER:
if (!style->filter.set && !style->filter.inherit) {
sp_style_read_ifilter(&style->filter, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
}
break;
case SP_PROP_FLOOD_COLOR:
g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
break;
case SP_PROP_FLOOD_OPACITY:
g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
break;
case SP_PROP_LIGHTING_COLOR:
g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
break;
/* Gradient */
case SP_PROP_STOP_COLOR:
g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
break;
case SP_PROP_STOP_OPACITY:
g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
break;
/* Interactivity */
case SP_PROP_POINTER_EVENTS:
g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
break;
/* Paint */
case SP_PROP_COLOR_INTERPOLATION:
g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
break;
case SP_PROP_COLOR_INTERPOLATION_FILTERS:
g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
break;
case SP_PROP_COLOR_PROFILE:
g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
break;
case SP_PROP_COLOR_RENDERING: {
/* Ignore the hint. */
SPIEnum dummy;
SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
break;
}
case SP_PROP_FILL:
if (!style->fill.set) {
sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
}
break;
case SP_PROP_FILL_OPACITY:
if (!style->fill_opacity.set) {
sp_style_read_iscale24(&style->fill_opacity, val);
}
break;
case SP_PROP_FILL_RULE:
if (!style->fill_rule.set) {
sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
}
break;
case SP_PROP_IMAGE_RENDERING: {
/* Ignore the hint. */
SPIEnum dummy;
SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
break;
}
case SP_PROP_MARKER:
/* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
/* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
marker_status("Setting SP_PROP_MARKER");
if (!style->marker[SP_MARKER_LOC].set) {
g_free(style->marker[SP_MARKER_LOC].value);
style->marker[SP_MARKER_LOC].value = g_strdup(val);
style->marker[SP_MARKER_LOC].set = TRUE;
style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
}
break;
case SP_PROP_MARKER_START:
/* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
marker_status("Setting SP_PROP_MARKER_START");
if (!style->marker[SP_MARKER_LOC_START].set) {
g_free(style->marker[SP_MARKER_LOC_START].value);
style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
style->marker[SP_MARKER_LOC_START].set = TRUE;
style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
}
break;
case SP_PROP_MARKER_MID:
/* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
marker_status("Setting SP_PROP_MARKER_MID");
if (!style->marker[SP_MARKER_LOC_MID].set) {
g_free(style->marker[SP_MARKER_LOC_MID].value);
style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
style->marker[SP_MARKER_LOC_MID].set = TRUE;
style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
}
break;
case SP_PROP_MARKER_END:
/* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
marker_status("Setting SP_PROP_MARKER_END");
if (!style->marker[SP_MARKER_LOC_END].set) {
g_free(style->marker[SP_MARKER_LOC_END].value);
style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
style->marker[SP_MARKER_LOC_END].set = TRUE;
style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
}
break;
case SP_PROP_SHAPE_RENDERING: {
/* Ignore the hint. */
SPIEnum dummy;
SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
break;
}
case SP_PROP_STROKE:
if (!style->stroke.set) {
sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
}
break;
case SP_PROP_STROKE_WIDTH:
SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
break;
case SP_PROP_STROKE_DASHARRAY:
if (!style->stroke_dasharray_set) {
sp_style_read_dash(style, val);
}
break;
case SP_PROP_STROKE_DASHOFFSET:
if (!style->stroke_dashoffset_set) {
/* fixme */
if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
style->stroke_dashoffset_set = TRUE;
} else {
style->stroke_dashoffset_set = FALSE;
}
}
break;
case SP_PROP_STROKE_LINECAP:
if (!style->stroke_linecap.set) {
sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
}
break;
case SP_PROP_STROKE_LINEJOIN:
if (!style->stroke_linejoin.set) {
sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
}
break;
case SP_PROP_STROKE_MITERLIMIT:
if (!style->stroke_miterlimit.set) {
sp_style_read_ifloat(&style->stroke_miterlimit, val);
}
break;
case SP_PROP_STROKE_OPACITY:
if (!style->stroke_opacity.set) {
sp_style_read_iscale24(&style->stroke_opacity, val);
}
break;
default:
g_warning("Invalid style property id: %d value: %s", id, val);
break;
}
}
static void
sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
{
/** \todo Ensure that property is lcased, as per
* http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
* Should probably be done in libcroco.
*/
unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
if (prop_idx != SP_ATTR_INVALID) {
/** \todo
* effic: Test whether the property is already set before trying to
* convert to string. Alternatively, set from CRTerm directly rather
* than converting to string.
*/
guchar *const str_value_unsigned = cr_term_to_string(decl->value);
gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
sp_style_merge_property(style, prop_idx, str_value);
g_free(str_value);
}
}
static void
sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
{
#if 0 /* forwards */
for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
CRDeclaration *decl = NULL;
cr_prop_list_get_decl(cur, &decl);
sp_style_merge_style_from_decl(style, decl);
}
#else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
if (props) {
sp_style_merge_from_props(style, cr_prop_list_get_next(props));
CRDeclaration *decl = NULL;
cr_prop_list_get_decl(props, &decl);
sp_style_merge_style_from_decl(style, decl);
}
#endif
}
/**
* \pre decl_list != NULL
*/
static void
sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
{
if (decl_list->next) {
sp_style_merge_from_decl_list(style, decl_list->next);
}
sp_style_merge_style_from_decl(style, decl_list);
}
static CRSelEng *
sp_repr_sel_eng()
{
CRSelEng *const ret = cr_sel_eng_new();
cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
/** \todo
* Check whether we need to register any pseudo-class handlers.
* libcroco has its own default handlers for first-child and lang.
*
* We probably want handlers for link and arguably visited (though
* inkscape can't visit links at the time of writing). hover etc.
* more useful in inkview than the editor inkscape.
*
* http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
* the following should be honoured, at least by inkview:
* :hover, :active, :focus, :visited, :link.
*/
g_assert(ret);
return ret;
}
static void
sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
{
static CRSelEng *sel_eng = NULL;
if (!sel_eng) {
sel_eng = sp_repr_sel_eng();
}
CRPropList *props = NULL;
CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
object->document->style_cascade,
object->repr,
&props);
g_return_if_fail(status == CR_OK);
/// \todo Check what errors can occur, and handle them properly.
if (props) {
sp_style_merge_from_props(style, props);
cr_prop_list_destroy(props);
}
}
/**
* Parses a style="..." string and merges it with an existing SPStyle.
*/
void
sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
{
/*
* Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
* ``When CSS styling is used, CSS inline style is specified by including
* semicolon-separated property declarations of the form "name : value"
* within the style attribute''.
*
* That's fairly ambiguous. Is a `value' allowed to contain semicolons?
* Why does it say "including", what else is allowed in the style
* attribute value?
*/
CRDeclaration *const decl_list
= cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
if (decl_list) {
sp_style_merge_from_decl_list(style, decl_list);
cr_declaration_destroy(decl_list);
}
}
/** Indexed by SP_CSS_FONT_SIZE_blah. */
static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
static void
sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
{
/* 'font-size' */
if (!child.set || child.inherit) {
/* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
child.computed = parent.computed;
} else if (child.type == SP_FONT_SIZE_LITERAL) {
/** \todo
* fixme: SVG and CSS do not specify clearly, whether we should use
* user or screen coordinates (Lauris)
*/
if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
child.computed = font_size_table[child.value];
} else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
child.computed = parent.computed / 1.2;
} else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
child.computed = parent.computed * 1.2;
} else {
/* Illegal value */
}
} else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
/* Unlike most other lengths, percentage for font size is relative to parent computed value
* rather than viewport. */
child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
}
}
/**
* Sets computed values in \a style, which may involve inheriting from (or in some other way
* calculating from) corresponding computed values of \a parent.
*
* References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
* http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
* inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
* about what the computed value is (not obvious for lengths).
*
* \pre \a parent's computed values are already up-to-date.
*/
void
sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
{
g_return_if_fail(style != NULL);
/** \todo
* fixme: Check for existing callers that might pass null parent.
* This should probably be g_return_if_fail, or else we should make a
* best attempt to set computed values correctly without having a parent
* (i.e., by assuming parent has initial values).
*/
if (!parent)
return;
/* CSS2 */
/* Font */
sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
/* 'font-style' */
if (!style->font_style.set || style->font_style.inherit) {
style->font_style.computed = parent->font_style.computed;
}
/* 'font-variant' */
if (!style->font_variant.set || style->font_variant.inherit) {
style->font_variant.computed = parent->font_variant.computed;
}
/* 'font-weight' */
if (!style->font_weight.set || style->font_weight.inherit) {
style->font_weight.computed = parent->font_weight.computed;
} else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
/** \todo
* fixme: This is unconditional, i.e., happens even if parent not
* present.
*/
style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
} else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
} else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
unsigned const parent_val = parent->font_weight.computed;
g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
// strictly, 'bolder' and 'lighter' should go to the next weight
// expressible in the current font family, but that's difficult to
// find out, so jumping by 3 seems an appropriate approximation
style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
? (unsigned)SP_CSS_FONT_WEIGHT_100
: parent_val - 3);
g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
} else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
unsigned const parent_val = parent->font_weight.computed;
g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
? (unsigned)SP_CSS_FONT_WEIGHT_900
: parent_val + 3);
g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
}
/* 'font-stretch' */
if (!style->font_stretch.set || style->font_stretch.inherit) {
style->font_stretch.computed = parent->font_stretch.computed;
} else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
unsigned const parent_val = parent->font_stretch.computed;
style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
? parent_val
: parent_val - 1);
g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
} else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
unsigned const parent_val = parent->font_stretch.computed;
g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
? parent_val
: parent_val + 1);
g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
}
/* text (css2) */
if (!style->text_indent.set || style->text_indent.inherit) {
style->text_indent.computed = parent->text_indent.computed;
}
if (!style->text_align.set || style->text_align.inherit) {
style->text_align.computed = parent->text_align.computed;
}
if (!style->text_decoration.set || style->text_decoration.inherit) {
style->text_decoration.underline = parent->text_decoration.underline;
style->text_decoration.overline = parent->text_decoration.overline;
style->text_decoration.line_through = parent->text_decoration.line_through;
style->text_decoration.blink = parent->text_decoration.blink;
}
if (!style->line_height.set || style->line_height.inherit) {
style->line_height.computed = parent->line_height.computed;
style->line_height.normal = parent->line_height.normal;
}
if (!style->letter_spacing.set || style->letter_spacing.inherit) {
style->letter_spacing.computed = parent->letter_spacing.computed;
style->letter_spacing.normal = parent->letter_spacing.normal;
}
if (!style->word_spacing.set || style->word_spacing.inherit) {
style->word_spacing.computed = parent->word_spacing.computed;
style->word_spacing.normal = parent->word_spacing.normal;
}
if (!style->text_transform.set || style->text_transform.inherit) {
style->text_transform.computed = parent->text_transform.computed;
}
if (!style->direction.set || style->direction.inherit) {
style->direction.computed = parent->direction.computed;
}
if (!style->block_progression.set || style->block_progression.inherit) {
style->block_progression.computed = parent->block_progression.computed;
}
if (!style->writing_mode.set || style->writing_mode.inherit) {
style->writing_mode.computed = parent->writing_mode.computed;
}
if (!style->text_anchor.set || style->text_anchor.inherit) {
style->text_anchor.computed = parent->text_anchor.computed;
}
if (style->opacity.inherit) {
style->opacity.value = parent->opacity.value;
}
/* Color */
if (!style->color.set || style->color.inherit) {
sp_style_merge_ipaint(style, &style->color, &parent->color);
}
/* Fill */
if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
sp_style_merge_ipaint(style, &style->fill, &parent->fill);
}
if (!style->fill_opacity.set || style->fill_opacity.inherit) {
style->fill_opacity.value = parent->fill_opacity.value;
}
if (!style->fill_rule.set || style->fill_rule.inherit) {
style->fill_rule.computed = parent->fill_rule.computed;
}
/* Stroke */
if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
}
if (!style->stroke_width.set || style->stroke_width.inherit) {
style->stroke_width.computed = parent->stroke_width.computed;
} else {
/* Update computed value for any change in font inherited from parent. */
double const em = style->font_size.computed;
if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
style->stroke_width.computed = style->stroke_width.value * em;
} else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
style->stroke_width.computed = style->stroke_width.value * ex;
}
}
if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
style->stroke_linecap.computed = parent->stroke_linecap.computed;
}
if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
}
if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
}
if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
/** \todo
* This code looks wrong. Why does the logic differ from the
* above properties? Similarly dashoffset below.
*/
style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
if (style->stroke_dash.n_dash > 0) {
style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
}
}
if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
style->stroke_dash.offset = parent->stroke_dash.offset;
}
if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
style->stroke_opacity.value = parent->stroke_opacity.value;
}
if (style->text && parent->text) {
if (!style->text->font_family.set || style->text->font_family.inherit) {
g_free(style->text->font_family.value);
style->text->font_family.value = g_strdup(parent->text->font_family.value);
}
}
/* Markers - Free the old value and make copy of the new */
for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
if (!style->marker[i].set || style->marker[i].inherit) {
g_free(style->marker[i].value);
style->marker[i].value = g_strdup(parent->marker[i].value);
}
}
/* Filter effects */
if(style->filter.set && style->filter.inherit) {
sp_style_merge_ifilter(style, &style->filter, &parent->filter);
}
if(style->enable_background.inherit) {
style->enable_background.value = parent->enable_background.value;
}
}
template <typename T>
static void
sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
{
if ( ( !(child.set) || child.inherit )
&& parent.set && !(parent.inherit) )
{
child = parent;
}
}
/**
* Copy SPIString from parent to child.
*/
static void
sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
{
if ( ( !(child.set) || child.inherit )
&& parent.set && !(parent.inherit) )
{
g_free(child.value);
child.value = g_strdup(parent.value);
child.set = parent.set;
child.inherit = parent.inherit;
}
}
static void
sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
SPIPaint &child, SPIPaint const &parent)
{
/** \todo
* I haven't given this much attention. See comments below about
* currentColor, colorProfile, and relative URIs.
*/
if (!child.set || child.inherit || child.currentcolor) {
sp_style_merge_ipaint(style, &child, &parent);
child.set = parent.set;
child.inherit = parent.inherit;
}
}
static void
sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
unsigned const max_computed_val,
unsigned const smaller_val)
{
/* We assume that min computed val is 0, contiguous up to max_computed_val,
then zero or more other absolute values, then smaller_val then larger_val. */
unsigned const min_computed_val = 0;
unsigned const larger_val = smaller_val + 1;
g_return_if_fail(min_computed_val < max_computed_val);
g_return_if_fail(max_computed_val < smaller_val);
if (parent.set && !parent.inherit) {
if (!child.set || child.inherit) {
child.value = parent.value;
child.set = parent.set; // i.e. true
child.inherit = parent.inherit; // i.e. false
} else if (child.value < smaller_val) {
/* Child has absolute value: leave as is. */
} else if ( ( child.value == smaller_val
&& parent.value == larger_val )
|| ( parent.value == smaller_val
&& child.value == larger_val ) )
{
child.set = false;
/*
* Note that this can result in a change in computed value in the
* rare case that the parent's setting was a no-op (i.e. if the
* parent's parent's computed value was already ultra-condensed or
* ultra-expanded). However, I'd guess that the change is for the
* better: I'd guess that if the properties were specified
* relatively, then the intent is to counteract parent's effect.
* I.e. I believe this is the best code even in that case.
*/
} else if (child.value == parent.value) {
/* Leave as is. */
/** \todo
* It's unclear what to do if style and parent specify the same
* relative directive (narrower or wider). We can either convert
* to absolute specification or coalesce to a single relative
* request (of half the strength of the original pair).
*
* Converting to a single level of relative specification is a
* better choice if the newly-unlinked clone is itself cloned to
* other contexts (inheriting different font stretchiness): it
* would preserve the effect that it will be narrower than
* the inherited context in each case. The disadvantage is that
* it will ~certainly affect the computed value of the
* newly-unlinked clone.
*/
} else {
unsigned const parent_val = parent.computed;
child.value = ( child.value == smaller_val
? ( parent_val == min_computed_val
? parent_val
: parent_val - 1 )
: ( parent_val == max_computed_val
? parent_val
: parent_val + 1 ) );
g_assert(child.value <= max_computed_val);
child.inherit = false;
g_assert(child.set);
}
}
}
template <typename LengthT>
static void
sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
double const parent_child_em_ratio)
{
if ( ( !(child.set) || child.inherit )
&& parent.set && !(parent.inherit) )
{
child = parent;
switch (parent.unit) {
case SP_CSS_UNIT_EM:
case SP_CSS_UNIT_EX:
child.value *= parent_child_em_ratio;
/** \todo
* fixme: Have separate ex ratio parameter.
* Get x height from libnrtype or pango.
*/
if (!isFinite(child.value)) {
child.value = child.computed;
child.unit = SP_CSS_UNIT_NONE;
}
break;
default:
break;
}
}
}
static double
get_relative_font_size_frac(SPIFontSize const &font_size)
{
switch (font_size.type) {
case SP_FONT_SIZE_LITERAL: {
switch (font_size.value) {
case SP_CSS_FONT_SIZE_SMALLER:
return 5.0 / 6.0;
case SP_CSS_FONT_SIZE_LARGER:
return 6.0 / 5.0;
default:
g_assert_not_reached();
}
}
case SP_FONT_SIZE_PERCENTAGE:
return SP_F8_16_TO_FLOAT(font_size.value);
case SP_FONT_SIZE_LENGTH:
g_assert_not_reached();
}
g_assert_not_reached();
}
/**
* Combine \a style and \a parent style specifications into a single style specification that
* preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
*
* Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
* unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
* trying to retain the same visual appearance once the parent is removed. Interesting cases are
* when there is unusual interaction with the parent's value (opacity, display) or when the value
* can be specified as relative to the parent computed value (font-size, font-weight etc.).
*
* Doesn't update computed values of \a style. For correctness, you should subsequently call
* sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
* style was previously up-to-date wrt \a parent.
*
* \pre \a parent's computed values are already up-to-date.
* (\a style's computed values needn't be up-to-date.)
*/
void
sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
{
/** \note
* The general rule for each property is as follows:
*
* If style is set to an absolute value, then leave it as is.
*
* Otherwise (i.e. if style has a relative value):
*
* If parent is set to an absolute value, then set style to the computed value.
*
* Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
*/
/* We do font-size first, to ensure that em size is up-to-date. */
/** \todo
* fixme: We'll need to have more font-related things up the top once
* we're getting x-height from pango or libnrtype.
*/
/* Some things that allow relative specifications. */
{
/* font-size. Note that we update the computed font-size of style,
to assist in em calculations later in this function. */
if (parent->font_size.set && !parent->font_size.inherit) {
if (!style->font_size.set || style->font_size.inherit) {
/* font_size inherits the computed value, so we can use the parent value
* verbatim. */
style->font_size = parent->font_size;
} else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
/* Child already has absolute size (stored in computed value), so do nothing. */
} else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
&& style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
/* Child already has absolute size, but we ensure that the computed value
is up-to-date. */
unsigned const ix = style->font_size.value;
g_assert(ix < G_N_ELEMENTS(font_size_table));
style->font_size.computed = font_size_table[ix];
} else {
/* Child has relative size. */
double const child_frac(get_relative_font_size_frac(style->font_size));
style->font_size.set = true;
style->font_size.inherit = false;
style->font_size.computed = parent->font_size.computed * child_frac;
if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
&& parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
|| parent->font_size.type == SP_FONT_SIZE_LENGTH )
{
/* Absolute value. */
style->font_size.type = SP_FONT_SIZE_LENGTH;
/* .value is unused for SP_FONT_SIZE_LENGTH. */
} else {
/* Relative value. */
double const parent_frac(get_relative_font_size_frac(parent->font_size));
style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
}
}
}
/* 'font-stretch' */
sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
parent->font_stretch,
SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
SP_CSS_FONT_STRETCH_NARROWER);
/* font-weight */
sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
parent->font_weight,
SP_CSS_FONT_WEIGHT_900,
SP_CSS_FONT_WEIGHT_LIGHTER);
}
/* Enum values that don't have any relative settings (other than `inherit'). */
{
SPIEnum SPStyle::*const fields[] = {
//nyi: SPStyle::clip_rule,
//nyi: SPStyle::color_interpolation,
//nyi: SPStyle::color_interpolation_filters,
//nyi: SPStyle::color_rendering,
&SPStyle::direction,
&SPStyle::fill_rule,
&SPStyle::font_style,
&SPStyle::font_variant,
//nyi: SPStyle::image_rendering,
//nyi: SPStyle::pointer_events,
//nyi: SPStyle::shape_rendering,
&SPStyle::stroke_linecap,
&SPStyle::stroke_linejoin,
&SPStyle::text_anchor,
//nyi: &SPStyle::text_rendering,
&SPStyle::visibility,
&SPStyle::writing_mode
};
for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
SPIEnum SPStyle::*const fld = fields[i];
sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
}
}
/* A few other simple inheritance properties. */
{
sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
/** \todo
* We currently treat text-decoration as if it were a simple inherited
* property (fixme). This code may need changing once we do the
* special fill/stroke inheritance mentioned by the spec.
*/
sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
parent->text_decoration);
//nyi: font-size-adjust, // <number> | none | inherit
//nyi: glyph-orientation-horizontal,
//nyi: glyph-orientation-vertical,
}
/* Properties that involve length but are easy in other respects. */
{
/* The difficulty with lengths is that font-relative units need adjusting if the font
* varies between parent & child.
*
* Lengths specified in the existing child can stay as they are: its computed font
* specification should stay unchanged, so em & ex lengths should continue to mean the same
* size.
*
* Lengths specified in the dying parent in em or ex need to be scaled according to the
* ratio of em or ex size between parent & child.
*/
double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
SPILength SPStyle::*const lfields[] = {
&SPStyle::stroke_width,
&SPStyle::text_indent
};
for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
SPILength SPStyle::*fld = lfields[i];
sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
parent->*fld,
parent_child_em_ratio);
}
SPILengthOrNormal SPStyle::*const nfields[] = {
&SPStyle::letter_spacing,
&SPStyle::line_height,
&SPStyle::word_spacing
};
for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
SPILengthOrNormal SPStyle::*fld = nfields[i];
sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
parent->*fld,
parent_child_em_ratio);
}
//nyi: &SPStyle::kerning: length or `auto'
/* fixme: Move stroke-dash and stroke-dash-offset here once they
can accept units. */
}
/* Properties that involve a URI but are easy in other respects. */
{
/** \todo
* Could cause problems if original object was in another document
* and it used a relative URL. (At the time of writing, we don't
* allow hrefs to other documents, so this isn't a problem yet.)
* Paint properties also allow URIs.
*/
//nyi: cursor, // may involve change in effect, but we can't do much better
//nyi: color-profile,
// Markers (marker-start, marker-mid, marker-end).
for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
}
}
/* CSS2 */
/* Font */
if (style->text && parent->text) {
sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
parent->text->font_family);
}
/* Properties that don't inherit by default. Most of these need special handling. */
{
/*
* opacity's effect is cumulative; we set the new value to the combined effect. The
* default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
* fill-opacity are quite different from opacity, and don't need any special handling.)
*
* Cases:
* - parent & child were each previously unset, in which case the effective
* opacity value is 1.0, and style should remain unset.
* - parent was previously unset (so computed opacity value of 1.0)
* and child was set to inherit. The merged child should
* get a value of 1.0, and shouldn't inherit (lest the new parent
* has a different opacity value). Given that opacity's default
* value is 1.0 (rather than inherit), we might as well have the
* merged child's opacity be unset.
* - parent was previously unset (so opacity 1.0), and child was set to a number.
* The merged child should retain its existing settings (though it doesn't matter
* if we make it unset if that number was 1.0).
* - parent was inherit and child was unset. Merged child should be set to inherit.
* - parent was inherit and child was inherit. (We can't in general reproduce this
* effect (short of introducing a new group), but setting opacity to inherit is rare.)
* If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
* child's value should be set to the product of the two, i.e. the square of the
* inherited value, and should not be marked as inherit. (This decision assumes that it
* is more important to retain the effective opacity than to retain the inheriting
* effect, and assumes that the inheriting effect either isn't important enough to create
* a group or isn't common enough to bother maintaining the code to create a group.) If
* the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
* closer to maintaining the effect.
* - parent was inherit and child was set to a numerical value. If the child's value
* was 1.0, then the merged child should have the same settings as the parent.
* If the child's value was 0, then the merged child should also be set to 0.
* If the child's value was anything else, then we do the same as for the inherit/inherit
* case above: have the merged child set to the product of the two opacities and not
* marked as inherit, for the same reasons as for that case.
* - parent was set to a value, and child was unset. The merged child should have
* parent's settings.
* - parent was set to a value, and child was inherit. The merged child should
* be set to the product, i.e. the square of the parent's value.
* - parent & child are each set to a value. The merged child should be set to the
* product.
*/
if ( !style->opacity.set
|| ( !style->opacity.inherit
&& style->opacity.value == SP_SCALE24_MAX ) )
{
style->opacity = parent->opacity;
} else {
/* Ensure that style's computed value is up-to-date. */
if (style->opacity.inherit) {
style->opacity.value = parent->opacity.value;
}
/* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
parent->opacity.value);
style->opacity.inherit = (parent->opacity.inherit
&& style->opacity.inherit
&& (parent->opacity.value == 0 ||
parent->opacity.value == SP_SCALE24_MAX));
style->opacity.set = ( style->opacity.inherit
|| style->opacity.value < SP_SCALE24_MAX );
}
/* display is in principle similar to opacity, but implementation is easier. */
if ( parent->display.set && !parent->display.inherit
&& parent->display.value == SP_CSS_DISPLAY_NONE ) {
style->display.value = SP_CSS_DISPLAY_NONE;
style->display.set = true;
style->display.inherit = false;
} else if (style->display.inherit) {
style->display.value = parent->display.value;
style->display.set = parent->display.set;
style->display.inherit = parent->display.inherit;
} else {
/* Leave as is. (display doesn't inherit by default.) */
}
/* enable-background - this is rather complicated, because
* it is valid only when applied to container elements.
* Let's check a simple case anyhow. */
if (parent->enable_background.set
&& !parent->enable_background.inherit
&& style->enable_background.inherit)
{
style->enable_background.set = true;
style->enable_background.inherit = false;
style->enable_background.value = parent->enable_background.value;
}
/** \todo
* fixme: Check that we correctly handle all properties that don't
* inherit by default (as shown in
* http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
*/
}
/* SPIPaint properties (including color). */
{
/** \todo
* Think about the issues involved if specified as currentColor or
* if specified relative to colorProfile, and if the currentColor or
* colorProfile differs between parent \& child. See also comments
* elsewhere in this function about URIs.
*/
SPIPaint SPStyle::*const fields[] = {
&SPStyle::color,
&SPStyle::fill,
&SPStyle::stroke
};
for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
SPIPaint SPStyle::*const fld = fields[i];
sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
}
}
/* Things from SVG 1.2 or CSS3. */
{
/* Note: If we ever support setting string values for text-align then we'd need strdup
* handling here. */
sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
}
/* Note: this will need length handling once dasharray supports units. */
if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
&& parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
{
style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
if (style->stroke_dash.n_dash > 0) {
style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
}
style->stroke_dasharray_set = parent->stroke_dasharray_set;
style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
}
/* Note: this will need length handling once dasharray_offset supports units. */
if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
style->stroke_dash.offset = parent->stroke_dash.offset;
style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
/* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
* represent it as a normal SPILength; though will need to do something about existing
* users of stroke_dash.offset and stroke_dashoffset_set. */
}
/* TODO: deal with filters */
}
/**
* Disconnects from possible fill and stroke paint servers.
*/
static void
sp_style_paint_server_release(SPObject *obj, SPStyle *style)
{
SPPaintServer *server=static_cast<SPPaintServer *>(obj);
if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
&& (server == style->fill.value.paint.server))
{
sp_style_paint_clear(style, &style->fill);
}
if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
&& (server == style->stroke.value.paint.server))
{
sp_style_paint_clear(style, &style->stroke);
}
}
/**
* Emit style modified signal on style's object if server is style's fill
* or stroke paint server.
*/
static void
sp_style_paint_server_modified(SPObject *obj, guint flags, SPStyle *style)
{
SPPaintServer *server = static_cast<SPPaintServer *>(obj);
if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
&& (server == style->fill.value.paint.server))
{
if (style->object) {
/** \todo
* fixme: I do not know, whether it is optimal - we are
* forcing reread of everything (Lauris)
*/
/** \todo
* fixme: We have to use object_modified flag, because parent
* flag is only available downstreams.
*/
style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
} else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
&& (server == style->stroke.value.paint.server))
{
if (style->object) {
/// \todo fixme:
style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
} else {
g_assert_not_reached();
}
}
/**
*
*/
static void
sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
{
sp_style_paint_clear(style, paint);
if ((paint->set && paint->currentcolor) || parent->currentcolor) {
paint->currentcolor = TRUE;
paint->type = SP_PAINT_TYPE_COLOR;
sp_color_copy(&paint->value.color, &style->color.value.color);
return;
}
paint->type = parent->type;
switch (paint->type) {
case SP_PAINT_TYPE_COLOR:
sp_color_copy(&paint->value.color, &parent->value.color);
break;
case SP_PAINT_TYPE_PAINTSERVER:
paint->value.paint.server = parent->value.paint.server;
paint->value.paint.uri = parent->value.paint.uri;
if (paint->value.paint.server) {
if (style->object && !style->cloned) { // href paintserver for style of non-clones only
sp_object_href(SP_OBJECT(paint->value.paint.server), style);
if (paint == &style->fill) {
style->fill_hreffed = true;
} else {
assert(paint == &style->stroke);
style->stroke_hreffed = true;
}
}
if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
SPObject *server = paint->value.paint.server;
sigc::connection release_connection
= server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
sigc::connection modified_connection
= server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
if (paint == &style->fill) {
style->fill_release_connection = release_connection;
style->fill_modified_connection = modified_connection;
} else {
assert(paint == &style->stroke);
style->stroke_release_connection = release_connection;
style->stroke_modified_connection = modified_connection;
}
}
}
break;
case SP_PAINT_TYPE_NONE:
break;
default:
g_assert_not_reached();
break;
}
}
/**
* Merge filter style from parent.
* Filter effects do not inherit by default
*/
static void
sp_style_merge_ifilter(SPStyle *style, SPIFilter *child, SPIFilter const *parent)
{
sp_style_filter_clear(style, child);
child->set = parent->set;
child->inherit = parent->inherit;
child->filter = parent->filter;
child->uri = parent->uri;
sp_object_href(SP_OBJECT(child), style);
style->filter_hreffed = true;
}
/**
* Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
* SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
* complete cascaded style to style_clipboard. When you need a CSS string
* for an object in the document tree, you normally call
* sp_style_write_difference instead to take into account the object's parent.
*
* \pre style != NULL.
* \pre flags in {IFSET, ALWAYS}.
* \post ret != NULL.
*/
gchar *
sp_style_write_string(SPStyle const *const style, guint const flags)
{
/** \todo
* Merge with write_difference, much duplicate code!
*/
g_return_val_if_fail(style != NULL, NULL);
g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
(flags == SP_STYLE_FLAG_ALWAYS) ),
NULL);
gchar c[BMAX];
gchar *p = c;
*p = '\0';
p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
/* Text */
p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
/// \todo fixme: Per type methods need default flag too (lauris)
p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
marker_status("sp_style_write_string: Writing markers");
if (style->marker[SP_MARKER_LOC].set) {
p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
} else if (flags == SP_STYLE_FLAG_ALWAYS) {
p += g_snprintf(p, c + BMAX - p, "marker:none;");
}
if (style->marker[SP_MARKER_LOC_START].set) {
p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
} else if (flags == SP_STYLE_FLAG_ALWAYS) {
p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
}
if (style->marker[SP_MARKER_LOC_MID].set) {
p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
} else if (flags == SP_STYLE_FLAG_ALWAYS) {
p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
}
if (style->marker[SP_MARKER_LOC_END].set) {
p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
} else if (flags == SP_STYLE_FLAG_ALWAYS) {
p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
}
p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
/** \todo fixme: */
if ((flags == SP_STYLE_FLAG_ALWAYS)
|| style->stroke_dasharray_set)
{
if (style->stroke_dasharray_inherit) {
p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
} else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
gint i;
for (i = 0; i < style->stroke_dash.n_dash; i++) {
Inkscape::CSSOStringStream os;
if (i) {
os << ", ";
}
os << style->stroke_dash.dash[i];
p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
}
if (p < c + BMAX) {
*p++ = ';';
}
} else {
p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
}
}
/** \todo fixme: */
if (style->stroke_dashoffset_set) {
Inkscape::CSSOStringStream os;
os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
} else if (flags == SP_STYLE_FLAG_ALWAYS) {
p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
}
p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
/* filter: */
p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
/* fixme: */
p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
/* Get rid of trailing `;'. */
if (p != c) {
--p;
if (*p == ';') {
*p = '\0';
}
}
return g_strdup(c);
}
#define STYLE_BUF_MAX
/**
* Dumps style to CSS string, see sp_style_write_string()
*
* \pre from != NULL.
* \pre to != NULL.
* \post ret != NULL.
*/
gchar *
sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
{
g_return_val_if_fail(from != NULL, NULL);
g_return_val_if_fail(to != NULL, NULL);
gchar c[BMAX], *p = c;
*p = '\0';
p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
/* Text */
p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
/// \todo fixme: Per type methods need default flag too
if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
}
p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
&from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
&from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
&from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
/** \todo fixme: */
if (from->stroke_dasharray_set) {
if (from->stroke_dasharray_inherit) {
p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
} else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
Inkscape::CSSOStringStream os;
if (i) {
os << ", ";
}
os << from->stroke_dash.dash[i];
p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
}
p += g_snprintf(p, c + BMAX - p, ";");
}
}
/* fixme: */
if (from->stroke_dashoffset_set) {
Inkscape::CSSOStringStream os;
os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
}
p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
/* markers */
marker_status("sp_style_write_difference: Writing markers");
if (from->marker[SP_MARKER_LOC].value != NULL) {
p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
}
if (from->marker[SP_MARKER_LOC_START].value != NULL) {
p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
}
if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
}
if (from->marker[SP_MARKER_LOC_END].value != NULL) {
p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
}
p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
/* filter: */
p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
/** \todo
* The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
* flag is mainly only for attributes that don't handle explicit unset well.
* We may need to revisit the behaviour of this routine.
*/
/* Get rid of trailing `;'. */
if (p != c) {
--p;
if (*p == ';') {
*p = '\0';
}
}
return g_strdup(c);
}
/**
* Reset all style properties.
*/
static void
sp_style_clear(SPStyle *style)
{
g_return_if_fail(style != NULL);
sp_style_paint_clear(style, &style->fill);
sp_style_paint_clear(style, &style->stroke);
sp_style_filter_clear(style, &style->filter);
if (style->stroke_dash.dash) {
g_free(style->stroke_dash.dash);
}
/** \todo fixme: Do that text manipulation via parents */
SPObject *object = style->object;
gint const refcount = style->refcount;
SPTextStyle *text = style->text;
unsigned const text_private = style->text_private;
memset(style, 0, sizeof(SPStyle));
style->refcount = refcount;
style->object = object;
style->text = text;
style->text_private = text_private;
/* fixme: */
style->text->font.set = FALSE;
style->text->font_family.set = FALSE;
style->font_size.set = FALSE;
style->font_size.type = SP_FONT_SIZE_LITERAL;
style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
style->font_size.computed = 12.0;
style->font_style.set = FALSE;
style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
style->font_variant.set = FALSE;
style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
style->font_weight.set = FALSE;
style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
style->font_stretch.set = FALSE;
style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
/* text */
style->text_indent.set = FALSE;
style->text_indent.unit = SP_CSS_UNIT_NONE;
style->text_indent.computed = 0.0;
style->text_align.set = FALSE;
style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
style->text_decoration.set = FALSE;
style->text_decoration.underline = FALSE;
style->text_decoration.overline = FALSE;
style->text_decoration.line_through = FALSE;
style->text_decoration.blink = FALSE;
style->line_height.set = FALSE;
style->line_height.unit = SP_CSS_UNIT_PERCENT;
style->line_height.normal = TRUE;
style->line_height.value = style->line_height.computed = 1.0;
style->letter_spacing.set = FALSE;
style->letter_spacing.unit = SP_CSS_UNIT_NONE;
style->letter_spacing.normal = TRUE;
style->letter_spacing.value = style->letter_spacing.computed = 0.0;
style->word_spacing.set = FALSE;
style->word_spacing.unit = SP_CSS_UNIT_NONE;
style->word_spacing.normal = TRUE;
style->word_spacing.value = style->word_spacing.computed = 0.0;
style->text_transform.set = FALSE;
style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
style->direction.set = FALSE;
style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
style->block_progression.set = FALSE;
style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
style->writing_mode.set = FALSE;
style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
style->text_anchor.set = FALSE;
style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
style->opacity.value = SP_SCALE24_MAX;
style->visibility.set = FALSE;
style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
style->display.set = FALSE;
style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
style->overflow.set = FALSE;
style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
style->color.type = SP_PAINT_TYPE_COLOR;
sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
style->fill.type = SP_PAINT_TYPE_COLOR;
sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
style->fill_opacity.value = SP_SCALE24_MAX;
style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
style->stroke.type = SP_PAINT_TYPE_NONE;
style->stroke.set = FALSE;
sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
style->stroke_opacity.value = SP_SCALE24_MAX;
style->stroke_width.set = FALSE;
style->stroke_width.unit = SP_CSS_UNIT_NONE;
style->stroke_width.computed = 1.0;
style->stroke_linecap.set = FALSE;
style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
style->stroke_linejoin.set = FALSE;
style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
style->stroke_miterlimit.set = FALSE;
style->stroke_miterlimit.value = 4.0;
style->stroke_dash.n_dash = 0;
style->stroke_dash.dash = NULL;
style->stroke_dash.offset = 0.0;
for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
g_free(style->marker[i].value);
style->marker[i].set = FALSE;
}
style->filter.set = FALSE;
//Are these really needed?
style->filter.inherit = FALSE;
style->filter.uri = NULL;
style->filter.filter = FALSE;
style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
style->enable_background.set = false;
style->enable_background.inherit = false;
}
/**
*
*/
static void
sp_style_read_dash(SPStyle *style, gchar const *str)
{
/* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
style->stroke_dasharray_set = TRUE;
if (strcmp(str, "inherit") == 0) {
style->stroke_dasharray_inherit = true;
return;
}
style->stroke_dasharray_inherit = false;
NRVpathDash &dash = style->stroke_dash;
g_free(dash.dash);
dash.dash = NULL;
if (strcmp(str, "none") == 0) {
dash.n_dash = 0;
return;
}
gint n_dash = 0;
gdouble d[64];
gchar *e = NULL;
bool LineSolid=true;
while (e != str && n_dash < 64) {
/* TODO: Should allow <length> rather than just a unitless (px) number. */
d[n_dash] = g_ascii_strtod(str, (char **) &e);
if (d[n_dash] > 0.00000001)
LineSolid = false;
if (e != str) {
n_dash += 1;
str = e;
}
while (str && *str && !isalnum(*str)) str += 1;
}
if (LineSolid) {
dash.n_dash = 0;
return;
}
if (n_dash > 0) {
dash.dash = g_new(gdouble, n_dash);
memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
dash.n_dash = n_dash;
}
}
/*#########################
## SPTextStyle operations
#########################*/
/**
* Return new SPTextStyle object with default settings.
*/
static SPTextStyle *
sp_text_style_new()
{
SPTextStyle *ts = g_new0(SPTextStyle, 1);
ts->refcount = 1;
sp_text_style_clear(ts);
ts->font.value = g_strdup("Bitstream Vera Sans");
ts->font_family.value = g_strdup("Bitstream Vera Sans");
return ts;
}
/**
* Clear text style settings.
*/
static void
sp_text_style_clear(SPTextStyle *ts)
{
ts->font.set = FALSE;
ts->font_family.set = FALSE;
}
/**
* Reduce refcount of text style and possibly free it.
*/
static SPTextStyle *
sp_text_style_unref(SPTextStyle *st)
{
st->refcount -= 1;
if (st->refcount < 1) {
g_free(st->font.value);
g_free(st->font_family.value);
g_free(st);
}
return NULL;
}
/**
* Return duplicate of text style.
*/
static SPTextStyle *
sp_text_style_duplicate_unset(SPTextStyle *st)
{
SPTextStyle *nt = g_new0(SPTextStyle, 1);
nt->refcount = 1;
nt->font.value = g_strdup(st->font.value);
nt->font_family.value = g_strdup(st->font_family.value);
return nt;
}
/**
* Write SPTextStyle object into string.
*/
static guint
sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
{
gint d = 0;
// We do not do diffing for text style
if (flags == SP_STYLE_FLAG_IFDIFF)
flags = SP_STYLE_FLAG_IFSET;
d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
return d;
}
/* The following sp_tyle_read_* functions ignore invalid values, as per
* http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
*
* [However, the SVG spec is somewhat unclear as to whether the style attribute should
* be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
* pairs, in which case SVG's error-handling rules
* http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
*/
/**
* Set SPIFloat object from string.
*/
static void
sp_style_read_ifloat(SPIFloat *val, gchar const *str)
{
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
} else {
gfloat value;
if (sp_svg_number_read_f(str, &value)) {
val->set = TRUE;
val->inherit = FALSE;
val->value = value;
}
}
}
/**
* Set SPIScale24 object from string.
*/
static void
sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
{
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
} else {
gfloat value;
if (sp_svg_number_read_f(str, &value)) {
val->set = TRUE;
val->inherit = FALSE;
value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
val->value = SP_SCALE24_FROM_FLOAT(value);
}
}
}
/**
* Reads a style value and performs lookup based on the given style value enumerations.
*/
static void
sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
bool const can_explicitly_inherit)
{
if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
val->set = TRUE;
val->inherit = TRUE;
} else {
for (unsigned i = 0; dict[i].key; i++) {
if (!strcmp(str, dict[i].key)) {
val->set = TRUE;
val->inherit = FALSE;
val->value = dict[i].value;
/* Save copying for values not needing it */
val->computed = val->value;
break;
}
}
}
}
/**
* Set SPIString object from string.
*/
static void
sp_style_read_istring(SPIString *val, gchar const *str)
{
g_free(val->value);
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
val->value = NULL;
} else {
val->set = TRUE;
val->inherit = FALSE;
val->value = g_strdup(str);
}
}
/**
* Set SPILength object from string.
*/
static void
sp_style_read_ilength(SPILength *val, gchar const *str)
{
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
} else {
gdouble value;
gchar *e;
/** \todo fixme: Move this to standard place (Lauris) */
value = g_ascii_strtod(str, &e);
if ((gchar const *) e != str) {
/** \todo
* Allow the number of px per inch to vary (document preferences,
* X server or whatever). E.g. don't fill in computed here, do
* it at the same time as percentage units are done.
*/
if (!*e) {
/* Userspace */
val->unit = SP_CSS_UNIT_NONE;
val->computed = value;
} else if (!strcmp(e, "px")) {
/* Userspace */
val->unit = SP_CSS_UNIT_PX;
val->computed = value;
} else if (!strcmp(e, "pt")) {
/* Userspace / DEVICESCALE */
val->unit = SP_CSS_UNIT_PT;
val->computed = value * PX_PER_PT;
} else if (!strcmp(e, "pc")) {
/* 1 pica = 12pt; FIXME: add it to SPUnit */
val->unit = SP_CSS_UNIT_PC;
val->computed = value * PX_PER_PT * 12;
} else if (!strcmp(e, "mm")) {
val->unit = SP_CSS_UNIT_MM;
val->computed = value * PX_PER_MM;
} else if (!strcmp(e, "cm")) {
val->unit = SP_CSS_UNIT_CM;
val->computed = value * PX_PER_CM;
} else if (!strcmp(e, "in")) {
val->unit = SP_CSS_UNIT_IN;
val->computed = value * PX_PER_IN;
} else if (!strcmp(e, "em")) {
/* EM square */
val->unit = SP_CSS_UNIT_EM;
val->value = value;
} else if (!strcmp(e, "ex")) {
/* ex square */
val->unit = SP_CSS_UNIT_EX;
val->value = value;
} else if (!strcmp(e, "%")) {
/* Percentage */
val->unit = SP_CSS_UNIT_PERCENT;
val->value = value * 0.01;
} else {
/* Invalid */
return;
}
val->set = TRUE;
val->inherit = FALSE;
}
}
}
/**
* Set SPILengthOrNormal object from string.
*/
static void
sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
{
if (!strcmp(str, "normal")) {
val->set = TRUE;
val->inherit = FALSE;
val->normal = TRUE;
val->unit = SP_CSS_UNIT_NONE;
val->value = val->computed = 0.0;
} else {
SPILength length;
sp_style_read_ilength(&length, str);
val->set = length.set;
val->inherit = length.inherit;
val->normal = FALSE;
val->unit = length.unit;
val->value = length.value;
val->computed = length.computed;
}
}
/**
* Set SPITextDecoration object from string.
*/
static void
sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
{
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
} else if (!strcmp(str, "none")) {
val->set = TRUE;
val->inherit = FALSE;
val->underline = FALSE;
val->overline = FALSE;
val->line_through = FALSE;
val->blink = FALSE;
} else {
bool found_underline = false;
bool found_overline = false;
bool found_line_through = false;
bool found_blink = false;
for ( ; *str ; str++ ) {
if (*str == ' ') continue;
if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
found_underline = true;
str += 9;
} else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
found_overline = true;
str += 8;
} else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
found_line_through = true;
str += 12;
} else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
found_blink = true;
str += 5;
} else {
return; // invalid value
}
}
if (!(found_underline || found_overline || found_line_through || found_blink)) {
return; // invalid value: empty
}
val->set = TRUE;
val->inherit = FALSE;
val->underline = found_underline;
val->overline = found_overline;
val->line_through = found_line_through;
val->blink = found_blink;
}
}
/**
* Set SPIPaint object from string containing an integer value.
* \param document Ignored
*/
static void
sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
{
paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
if (!strcmp(str, "inherit")) {
paint->set = TRUE;
paint->inherit = TRUE;
} else {
guint32 const rgb0 = sp_svg_read_color(str, 0xff);
if (rgb0 != 0xff) {
paint->type = SP_PAINT_TYPE_COLOR;
sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
paint->set = TRUE;
paint->inherit = FALSE;
}
}
}
/**
* Set SPIPaint object from string.
*
* \pre paint == \&style.fill || paint == \&style.stroke.
*/
static void
sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
{
while (isspace(*str)) {
++str;
}
if (streq(str, "inherit")) {
paint->set = TRUE;
paint->inherit = TRUE;
paint->currentcolor = FALSE;
} else if (streq(str, "currentColor") && paint != &style->color) {
paint->set = TRUE;
paint->inherit = FALSE;
paint->currentcolor = TRUE;
} else if (streq(str, "none") && paint != &style->color) {
paint->type = SP_PAINT_TYPE_NONE;
paint->set = TRUE;
paint->inherit = FALSE;
paint->currentcolor = FALSE;
} else if (strneq(str, "url", 3) && paint != &style->color) {
// this is alloc'd uri, but seems to be shared with a parent
// potentially, so it's not any easy g_free case...
paint->value.paint.uri = extract_uri(str);
if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
paint->type = SP_PAINT_TYPE_NONE;
return;
}
paint->type = SP_PAINT_TYPE_PAINTSERVER;
paint->set = TRUE;
paint->inherit = FALSE;
paint->currentcolor = FALSE;
if (document) {
SPObject *ps = sp_uri_reference_resolve(document, str);
if (ps && SP_IS_PAINT_SERVER(ps)) {
paint->value.paint.server = SP_PAINT_SERVER(ps);
if (style->object && !style->cloned) {
sp_object_href(SP_OBJECT(paint->value.paint.server), style);
if (paint == &style->fill) {
style->fill_hreffed = true;
} else {
assert(paint == &style->stroke);
style->stroke_hreffed = true;
}
}
if (style->object || style->cloned) {
SPObject *server = paint->value.paint.server;
sigc::connection release_connection
= server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
sigc::connection modified_connection
= server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
if (paint == &style->fill) {
style->fill_release_connection = release_connection;
style->fill_modified_connection = modified_connection;
} else {
assert(paint == &style->stroke);
style->stroke_release_connection = release_connection;
style->stroke_modified_connection = modified_connection;
}
}
} else {
paint->value.paint.server = NULL;
}
}
} else {
guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
if (rgb0 != 0xff) {
paint->type = SP_PAINT_TYPE_COLOR;
sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
paint->set = TRUE;
paint->inherit = FALSE;
paint->currentcolor = FALSE;
while (g_ascii_isspace(*str)) {
++str;
}
if (strneq(str, "icc-color(", 10)) {
SVGICCColor* tmp = new SVGICCColor();
if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
delete tmp;
tmp = 0;
}
paint->iccColor = tmp;
}
}
}
}
/**
* Set SPIFontSize object from string.
*/
static void
sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
{
if (!strcmp(str, "inherit")) {
val->set = TRUE;
val->inherit = TRUE;
} else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
for (unsigned i = 0; enum_font_size[i].key; i++) {
if (!strcmp(str, enum_font_size[i].key)) {
val->set = TRUE;
val->inherit = FALSE;
val->type = SP_FONT_SIZE_LITERAL;
val->value = enum_font_size[i].value;
return;
}
}
/* Invalid */
return;
} else {
gdouble value;
gchar *e;
/* fixme: Move this to standard place (Lauris) */
value = g_ascii_strtod(str, &e);
if ((gchar const *) e != str) {
if (!*e) {
/* Userspace */
} else if (!strcmp(e, "px")) {
/* Userspace */
} else if (!strcmp(e, "pt")) {
/* Userspace * DEVICESCALE */
value *= PX_PER_PT;
} else if (!strcmp(e, "pc")) {
/* 12pt */
value *= PX_PER_PT * 12.0;
} else if (!strcmp(e, "mm")) {
value *= PX_PER_MM;
} else if (!strcmp(e, "cm")) {
value *= PX_PER_CM;
} else if (!strcmp(e, "in")) {
value *= PX_PER_IN;
} else if (!strcmp(e, "%")) {
/* Percentage */
val->set = TRUE;
val->inherit = FALSE;
val->type = SP_FONT_SIZE_PERCENTAGE;
val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
return;
} else {
/* Invalid */
return;
}
/* Length */
val->set = TRUE;
val->inherit = FALSE;
val->type = SP_FONT_SIZE_LENGTH;
val->computed = value;
return;
}
}
}
/**
* Set SPIFilter object from string.
*/
static void
sp_style_read_ifilter( SPIFilter *f, gchar const *str, SPStyle * style, SPDocument *document)
{
/* Try all possible values: inherit, none, uri */
if (streq(str, "inherit")) {
f->set = TRUE;
f->inherit = TRUE;
f->filter = NULL;
} else if(streq(str, "none")) {
f->set = TRUE;
f->inherit = FALSE;
f->filter = NULL;
} else if (strneq(str, "url", 3)) {
f->uri = extract_uri(str);
if(f->uri == NULL || f->uri[0] == '\0') {
g_warning("Specified filter url is empty");
f->set = TRUE;
f->inherit = FALSE;
f->filter = NULL;
return;
}
f->set = TRUE;
f->inherit = FALSE;
f->filter = NULL;
if (document) {
SPObject *obj;
obj = sp_uri_reference_resolve(document, str);
if (SP_IS_FILTER(obj)) {
f->filter = SP_FILTER(obj);
sp_object_href(SP_OBJECT(f->filter), style);
style->filter_hreffed = true;
//g_signal_connect(G_OBJECT(f->filter), "release",
// G_CALLBACK(sp_style_filter_release), style);
//g_signal_connect(G_OBJECT(f->filter), "modified",
// G_CALLBACK(sp_style_filter_modified), style);
} else {
g_warning("Element '%s' not found or is not a filter", f->uri);
}
}
} else {
/* We shouldn't reach this if SVG input is well-formed */
f->set = FALSE;
f->inherit = FALSE;
f->filter = NULL;
f->uri = NULL;
}
}
/**
* Set SPIEnum object from repr attribute.
*/
static void
sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
gchar const *key, SPStyleEnum const *dict,
bool const can_explicitly_inherit)
{
gchar const *str = repr->attribute(key);
if (str) {
sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
}
}
/**
* Set SPILength object from repr attribute.
*/
static void
sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
{
gchar const *str = repr->attribute(key);
if (str) {
sp_style_read_ilength(val, str);
}
}
/**
* Set SPIFontSize object from repr attribute.
*/
static void
sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
{
gchar const *str = repr->attribute(key);
if (str) {
sp_style_read_ifontsize(val, str);
}
}
/**
* Set SPIFloat object from repr attribute.
*/
static void
sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
{
gchar const *str = repr->attribute(key);
if (str) {
sp_style_read_ifloat(val, str);
}
}
/**
* Write SPIFloat object into string.
*/
static gint
sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
SPIFloat const *const val, SPIFloat const *const base, guint const flags)
{
Inkscape::CSSOStringStream os;
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || (val->value != base->value))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else {
os << key << ":" << val->value << ";";
return g_strlcpy(p, os.str().c_str(), len);
}
}
return 0;
}
/**
* Write SPIScale24 object into string.
*/
static gint
sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
SPIScale24 const *const val, SPIScale24 const *const base,
guint const flags)
{
Inkscape::CSSOStringStream os;
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || (val->value != base->value))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else {
os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
return g_strlcpy(p, os.str().c_str(), len);
}
}
return 0;
}
/**
* Write SPIEnum object into string.
*/
static gint
sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
SPStyleEnum const *const dict,
SPIEnum const *const val, SPIEnum const *const base, guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || (val->computed != base->computed))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
}
for (unsigned i = 0; dict[i].key; i++) {
if (dict[i].value == static_cast< gint > (val->value) ) {
return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
}
}
}
return 0;
}
/**
* Write SPIString object into string.
*/
static gint
sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
SPIString const *const val, SPIString const *const base, guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || strcmp(val->value, base->value))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else {
return g_snprintf(p, len, "%s:%s;", key, val->value);
}
}
return 0;
}
/**
*
*/
static bool
sp_length_differ(SPILength const *const a, SPILength const *const b)
{
if (a->unit != b->unit) {
if (a->unit == SP_CSS_UNIT_EM) return true;
if (a->unit == SP_CSS_UNIT_EX) return true;
if (a->unit == SP_CSS_UNIT_PERCENT) return true;
if (b->unit == SP_CSS_UNIT_EM) return true;
if (b->unit == SP_CSS_UNIT_EX) return true;
if (b->unit == SP_CSS_UNIT_PERCENT) return true;
}
return (a->computed != b->computed);
}
/**
* Write SPILength object into string.
*/
static gint
sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
SPILength const *const val, SPILength const *const base, guint const flags)
{
Inkscape::CSSOStringStream os;
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || sp_length_differ(val, base))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else {
switch (val->unit) {
case SP_CSS_UNIT_NONE:
os << key << ":" << val->computed << ";";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_PX:
os << key << ":" << val->computed << "px;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_PT:
os << key << ":" << val->computed * PT_PER_PX << "pt;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_PC:
os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_MM:
os << key << ":" << val->computed * MM_PER_PX << "mm;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_CM:
os << key << ":" << val->computed * CM_PER_PX << "cm;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_IN:
os << key << ":" << val->computed * IN_PER_PX << "in;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_EM:
os << key << ":" << val->value << "em;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_EX:
os << key << ":" << val->value << "ex;";
return g_strlcpy(p, os.str().c_str(), len);
break;
case SP_CSS_UNIT_PERCENT:
os << key << ":" << (val->value * 100.0) << "%;";
return g_strlcpy(p, os.str().c_str(), len);
break;
default:
/* Invalid */
break;
}
}
}
return 0;
}
/**
*
*/
static bool
sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
{
if (a->normal != b->normal) return true;
if (a->normal) return false;
if (a->unit != b->unit) {
if (a->unit == SP_CSS_UNIT_EM) return true;
if (a->unit == SP_CSS_UNIT_EX) return true;
if (a->unit == SP_CSS_UNIT_PERCENT) return true;
if (b->unit == SP_CSS_UNIT_EM) return true;
if (b->unit == SP_CSS_UNIT_EX) return true;
if (b->unit == SP_CSS_UNIT_PERCENT) return true;
}
return (a->computed != b->computed);
}
/**
* Write SPILengthOrNormal object into string.
*/
static gint
sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
SPILengthOrNormal const *const val,
SPILengthOrNormal const *const base,
guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || sp_lengthornormal_differ(val, base))))
{
if (val->normal) {
return g_snprintf(p, len, "%s:normal;", key);
} else {
SPILength length;
length.set = val->set;
length.inherit = val->inherit;
length.unit = val->unit;
length.value = val->value;
length.computed = val->computed;
return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
}
}
return 0;
}
/**
*
*/
static bool
sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
{
return a->underline != b->underline
|| a->overline != b->overline
|| a->line_through != b->line_through
|| a->blink != b->blink;
}
/**
* Write SPITextDecoration object into string.
*/
static gint
sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
SPITextDecoration const *const val,
SPITextDecoration const *const base,
guint const flags)
{
Inkscape::CSSOStringStream os;
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || sp_textdecoration_differ(val, base))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else {
os << key << ":";
if (val->underline || val->overline || val->line_through || val->blink) {
if (val->underline) os << " underline";
if (val->overline) os << " overline";
if (val->line_through) os << " line-through";
if (val->blink) os << " blink";
} else
os << "none";
os << ";";
return g_strlcpy(p, os.str().c_str(), len);
}
}
return 0;
}
/**
*
*/
static bool
sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
{
if (a->type != b->type)
return true;
if (a->type == SP_PAINT_TYPE_COLOR)
return !(sp_color_is_equal(&a->value.color, &b->value.color)
&& ((a->iccColor == b->iccColor)
|| (a->iccColor && b->iccColor
&& (a->iccColor->colorProfile == b->iccColor->colorProfile)
&& (a->iccColor->colors == b->iccColor->colors))));
/* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
* in the string representation. */
if (a->type == SP_PAINT_TYPE_PAINTSERVER)
return (a->value.paint.server != b->value.paint.server);
return false;
}
/**
* Write SPIPaint object into string.
*/
static gint
sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
&& (!base->set || sp_paint_differ(paint, base))))
{
if (paint->inherit) {
return g_snprintf(b, len, "%s:inherit;", key);
} else if (paint->currentcolor) {
return g_snprintf(b, len, "%s:currentColor;", key);
} else {
switch (paint->type) {
case SP_PAINT_TYPE_COLOR: {
char color_buf[8];
sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
if (paint->iccColor) {
CSSOStringStream css;
css << color_buf << " icc-color(" << paint->iccColor->colorProfile;
for (vector<double>::const_iterator i(paint->iccColor->colors.begin()),
iEnd(paint->iccColor->colors.end());
i != iEnd; ++i) {
css << ", " << *i;
}
css << ')';
return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
} else {
return g_snprintf(b, len, "%s:%s;", key, color_buf);
}
}
case SP_PAINT_TYPE_PAINTSERVER:
return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
default:
break;
}
return g_snprintf(b, len, "%s:none;", key);
}
}
return 0;
}
/**
*
*/
static bool
sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
{
if (a->type != b->type)
return true;
if (a->type == SP_FONT_SIZE_LENGTH) {
if (a->computed != b->computed)
return true;
} else {
if (a->value != b->value)
return true;
}
return false;
}
/**
* Write SPIFontSize object into string.
*/
static gint
sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
SPIFontSize const *const val, SPIFontSize const *const base,
guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
&& (!base->set || sp_fontsize_differ(val, base))))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else if (val->type == SP_FONT_SIZE_LITERAL) {
for (unsigned i = 0; enum_font_size[i].key; i++) {
if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
}
}
} else if (val->type == SP_FONT_SIZE_LENGTH) {
Inkscape::CSSOStringStream os;
os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
return g_strlcpy(p, os.str().c_str(), len);
} else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
Inkscape::CSSOStringStream os;
os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
return g_strlcpy(p, os.str().c_str(), len);
}
}
return 0;
}
/**
* Write SPIFilter object into string.
*/
static gint
sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
SPIFilter const *const val, SPIFilter const *const base,
guint const flags)
{
if ((flags & SP_STYLE_FLAG_ALWAYS)
|| ((flags & SP_STYLE_FLAG_IFSET) && val->set)
|| ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
{
if (val->inherit) {
return g_snprintf(p, len, "%s:inherit;", key);
} else if (val->uri) {
return g_snprintf(p, len, "%s:url(%s);", key, val->uri);
}
}
return 0;
}
/**
* Clear paint object, and disconnect style from paintserver (if present).
*/
static void
sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
{
if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
if (paint == &style->fill) {
if (style->fill_hreffed) {
sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
style->fill_hreffed = false;
}
style->fill_release_connection.disconnect();
style->fill_modified_connection.disconnect();
} else {
assert(paint == &style->stroke); // Only fill & stroke can have a paint server.
if (style->stroke_hreffed) {
sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
style->stroke_hreffed = false;
}
style->stroke_release_connection.disconnect();
style->stroke_modified_connection.disconnect();
}
paint->value.paint.server = NULL;
}
paint->value.paint.uri = NULL;
paint->type = SP_PAINT_TYPE_NONE;
delete paint->iccColor;
paint->iccColor = NULL;
}
/**
* Clear filter object, and disconnect style from paintserver (if present).
*/
static void
sp_style_filter_clear(SPStyle *style, SPIFilter *f)
{
if (style->filter_hreffed) {
sp_object_hunref(SP_OBJECT(f->filter), style);
style->filter_hreffed = false;
}
//style->fill_release_connection.disconnect();
//style->fill_modified_connection.disconnect();
f->filter = NULL;
}
// FIXME: Everything below this line belongs in a different file - css-chemistry?
void
sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
{
Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
if (repr == NULL) return;
g_return_if_fail(linked != NULL);
gchar *val = g_strdup_printf("url(#%s)", SP_OBJECT_ID(linked));
SPCSSAttr *css = sp_repr_css_attr_new();
sp_repr_css_set_property(css, property, val);
g_free(val);
if (recursive) {
sp_repr_css_change_recursive(repr, css, "style");
} else {
sp_repr_css_change(repr, css, "style");
}
sp_repr_css_attr_unref(css);
}
/**
* Clear all style property attributes in object.
*/
void
sp_style_unset_property_attrs(SPObject *o)
{
if (!o) return;
SPStyle *style = SP_OBJECT_STYLE(o);
if (!style) return;
Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
if (!repr) return;
if (style->opacity.set) {
repr->setAttribute("opacity", NULL);
}
if (style->color.set) {
repr->setAttribute("color", NULL);
}
if (style->fill.set) {
repr->setAttribute("fill", NULL);
}
if (style->fill_opacity.set) {
repr->setAttribute("fill-opacity", NULL);
}
if (style->fill_rule.set) {
repr->setAttribute("fill-rule", NULL);
}
if (style->stroke.set) {
repr->setAttribute("stroke", NULL);
}
if (style->stroke_width.set) {
repr->setAttribute("stroke-width", NULL);
}
if (style->stroke_linecap.set) {
repr->setAttribute("stroke-linecap", NULL);
}
if (style->stroke_linejoin.set) {
repr->setAttribute("stroke-linejoin", NULL);
}
if (style->marker[SP_MARKER_LOC].set) {
repr->setAttribute("marker", NULL);
}
if (style->marker[SP_MARKER_LOC_START].set) {
repr->setAttribute("marker-start", NULL);
}
if (style->marker[SP_MARKER_LOC_MID].set) {
repr->setAttribute("marker-mid", NULL);
}
if (style->marker[SP_MARKER_LOC_END].set) {
repr->setAttribute("marker-end", NULL);
}
if (style->stroke_opacity.set) {
repr->setAttribute("stroke-opacity", NULL);
}
if (style->stroke_dasharray_set) {
repr->setAttribute("stroke-dasharray", NULL);
}
if (style->stroke_dashoffset_set) {
repr->setAttribute("stroke-dashoffset", NULL);
}
if (style->text_private && style->text->font_family.set) {
repr->setAttribute("font-family", NULL);
}
if (style->text_anchor.set) {
repr->setAttribute("text-anchor", NULL);
}
if (style->writing_mode.set) {
repr->setAttribute("writing_mode", NULL);
}
if (style->filter.set) {
repr->setAttribute("filter", NULL);
}
if (style->enable_background.set) {
repr->setAttribute("enable-background", NULL);
}
}
/**
* \pre style != NULL.
* \pre flags in {IFSET, ALWAYS}.
*/
SPCSSAttr *
sp_css_attr_from_style(SPStyle const *const style, guint const flags)
{
g_return_val_if_fail(style != NULL, NULL);
g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
(flags == SP_STYLE_FLAG_ALWAYS) ),
NULL);
gchar *style_str = sp_style_write_string(style, flags);
SPCSSAttr *css = sp_repr_css_attr_new();
sp_repr_css_attr_add_from_string(css, style_str);
g_free(style_str);
return css;
}
/**
* \pre object != NULL
* \pre flags in {IFSET, ALWAYS}.
*/
SPCSSAttr *
sp_css_attr_from_object(SPObject *object, guint const flags)
{
g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
(flags == SP_STYLE_FLAG_ALWAYS) ),
NULL);
SPStyle const *const style = SP_OBJECT_STYLE(object);
if (style == NULL)
return NULL;
return sp_css_attr_from_style(style, flags);
}
/**
* Unset any text-related properties
*/
SPCSSAttr *
sp_css_attr_unset_text(SPCSSAttr *css)
{
sp_repr_css_set_property(css, "font", NULL); // not implemented yet
sp_repr_css_set_property(css, "font-size", NULL);
sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
sp_repr_css_set_property(css, "font-style", NULL);
sp_repr_css_set_property(css, "font-variant", NULL);
sp_repr_css_set_property(css, "font-weight", NULL);
sp_repr_css_set_property(css, "font-stretch", NULL);
sp_repr_css_set_property(css, "font-family", NULL);
sp_repr_css_set_property(css, "text-indent", NULL);
sp_repr_css_set_property(css, "text-align", NULL);
sp_repr_css_set_property(css, "text-decoration", NULL);
sp_repr_css_set_property(css, "line-height", NULL);
sp_repr_css_set_property(css, "letter-spacing", NULL);
sp_repr_css_set_property(css, "word-spacing", NULL);
sp_repr_css_set_property(css, "text-transform", NULL);
sp_repr_css_set_property(css, "direction", NULL);
sp_repr_css_set_property(css, "block-progression", NULL);
sp_repr_css_set_property(css, "writing-mode", NULL);
sp_repr_css_set_property(css, "text-anchor", NULL);
sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
return css;
}
bool
is_url(char const *p)
{
if (p == NULL)
return false;
/** \todo
* FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
* in property values must start with 'url('.
*/
return (g_ascii_strncasecmp(p, "url(", 4) == 0);
}
/**
* Unset any properties that contain URI values.
*
* Used for storing style that will be reused across documents when carrying
* the referenced defs is impractical.
*/
SPCSSAttr *
sp_css_attr_unset_uris(SPCSSAttr *css)
{
// All properties that may hold <uri> or <paint> according to SVG 1.1
if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
return css;
}
/**
* Scale a single-value property.
*/
void
sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
double ex, bool only_with_units = false)
{
gchar const *w = sp_repr_css_property(css, property, NULL);
if (w) {
gchar *units = NULL;
double wd = g_ascii_strtod(w, &units) * ex;
if (w == units) {// nothing converted, non-numeric value
return;
}
if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
// only_with_units, but no units found, so do nothing.
return;
}
Inkscape::CSSOStringStream os;
os << wd << units; // reattach units
sp_repr_css_set_property(css, property, os.str().c_str());
}
}
/**
* Scale a list-of-values property.
*/
void
sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
{
gchar const *string = sp_repr_css_property(css, property, NULL);
if (string) {
Inkscape::CSSOStringStream os;
gchar **a = g_strsplit(string, ",", 10000);
bool first = true;
for (gchar **i = a; i != NULL; i++) {
gchar *w = *i;
if (w == NULL)
break;
gchar *units = NULL;
double wd = g_ascii_strtod(w, &units) * ex;
if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
g_strfreev(a);
return;
}
if (!first) {
os << ",";
}
os << wd << units; // reattach units
first = false;
}
sp_repr_css_set_property(css, property, os.str().c_str());
g_strfreev(a);
}
}
/**
* Scale any properties that may hold <length> by ex.
*/
SPCSSAttr *
sp_css_attr_scale(SPCSSAttr *css, double ex)
{
sp_css_attr_scale_property_single(css, "baseline-shift", ex);
sp_css_attr_scale_property_single(css, "stroke-width", ex);
sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
sp_css_attr_scale_property_single(css, "font-size", ex);
sp_css_attr_scale_property_single(css, "kerning", ex);
sp_css_attr_scale_property_single(css, "letter-spacing", ex);
sp_css_attr_scale_property_single(css, "word-spacing", ex);
sp_css_attr_scale_property_single(css, "line-height", ex, true);
return css;
}
/**
* Remove quotes from SPIString object value.
*
* \todo FIXME: now used for font family, but perhaps this should apply to
* ALL strings (check CSS spec), in which case this should be part of
* read_istring.
*/
static void
css2_unescape_unquote(SPIString *val)
{
if (val->set && val->value && strlen(val->value) >= 2) {
/// \todo unescape all \-escaped chars
int l = strlen(val->value);
if ( ( val->value[0] == '"' && val->value[l - 1] == '"' ) ||
( val->value[0] == '\'' && val->value[l - 1] == '\'' ) ) {
memcpy(val->value, val->value + 1, l - 2);
val->value[l - 2] = '\0';
}
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :