/*
* bulia byak <buliabyak@users.sf.net>
* Tavmjong Bah <tavmjong@free.fr> (Documentation)
*
* Functions to manipulate SPCSSAttr which is a class derived from Inkscape::XML::Node See
* sp-css-attr.h and node.h
*
* SPCSSAttr is a special node type where the "attributes" are the properties in an element's style
* attribute. For example, style="fill:blue;stroke:none" is stored in a List (Inkscape::Util:List)
* where the key is the property (e.g. "fill" or "stroke") and the value is the property's value
* (e.g. "blue" or "none"). An element's properties are manipulated by adding, removing, or
* changing an item in the List. Utility functions are provided to go back and forth between the
* two ways of representing properties (by a string or by a list).
*
* Use sp_repr_css_write_string to go from a property list to a style string.
*
*/
#define SP_REPR_CSS_C
#include <cstring>
#include <string>
#include <sstream>
#include "svg/css-ostringstream.h"
#include "xml/simple-document.h"
#include "xml/simple-node.h"
#include "xml/sp-css-attr.h"
#include "style.h"
#include "libcroco/cr-sel-eng.h"
public:
protected:
};
/**
* Creates an empty SPCSSAttr (a class for manipulating CSS style properties).
*/
{
if (!attr_doc) {
}
return new SPCSSAttrImpl(attr_doc);
}
/**
* Unreferences an SPCSSAttr (will be garbage collected if no references remain).
*/
{
}
/**
* Creates a new SPCSSAttr with one attribute (i.e. style) copied from an existing repr (node). The
* repr attribute data is in the form of a char const * string (e.g. fill:#00ff00;stroke:none). The
* string is parsed by libcroco which returns a CRDeclaration list (a typical C linked list) of
* properties and values. This list is then used to fill the attributes of the new SPCSSAttr.
*/
{
return css;
}
/**
* Attempt to parse the passed string as a hexadecimal RGB or RGBA color.
* @param text The Glib::ustring to parse
* @return New CSS style representation if the parsing was successful, NULL otherwise
*/
{
// TODO reuse existing code instead of replicating here.
bool attempt_alpha = false;
return NULL; // this is OK due to boolean short-circuit
}
// those conditionals guard against parsing e.g. the string "fab" as "fab000"
// (incomplete color) and "45fab71" as "45fab710" (incomplete alpha)
if ( *str == '#' ) {
if ( len < 7 ) {
return NULL;
}
if ( len >= 9 ) {
attempt_alpha = true;
}
} else {
if ( len < 6 ) {
return NULL;
}
if ( len >= 8 ) {
attempt_alpha = true;
}
}
// skip a leading #, if present
if ( *str == '#' ) {
++str;
}
// try to parse first 6 digits
if (attempt_alpha) {// try to parse alpha if there's enough characters
alpha = 0xff;
}
}
// print and set properties
if (opacity > 1.0) {
}
return color_css;
}
return NULL;
}
/**
* Adds an attribute to an existing SPCSAttr with the cascaded value including all parents.
*/
{
// read the ancestors from root down, using head recursion, so that children override parents
if (parent) {
}
}
/**
* Creates a new SPCSSAttr with one attribute whose value is determined by cascading.
*/
{
return css;
}
/**
* Adds components (style properties) to an existing SPCSAttr from the specified attribute's data
* (nominally a style attribute).
*
*/
{
}
/**
* Returns a character string of the value of a given style property or a default value if the
* attribute is not found.
*/
{
? defval
: attr );
}
/**
* Returns true if a style property is present and its value is unset.
*/
{
}
/**
* Set a style property to a new value (e.g. fill to #ffff00).
*/
{
}
/**
* Set a style property to "inkscape:unset".
*/
{
}
/**
* Return the value of a style property if property define, or a default value if not.
*/
{
return val;
}
/**
* Write a style attribute string from a list of properties stored in an SPCSAttr object.
*/
{
{
continue;
}
}
}
}
/**
* Sets an attribute (e.g. style) to a string created from a list of style properties.
*/
{
/*
* If the new value is different from the old value, this will sometimes send a signal via
* CompositeNodeObserver::notiftyAttributeChanged() which results in calling
* SPObject::repr_attr_changed and thus updates the object's SPStyle. This update
* results in another call to repr->setAttribute().
*/
}
/**
*/
{
{
}
}
/**
* Merges two SPCSSAttr's. Properties in src overwrite properties in dst if present in both.
*/
{
}
/**
* Merges style properties as parsed by libcroco into an existing SPCSSAttr.
* libcroco converts all single quotes to double quotes, which needs to be
* undone as we always use single quotes inside our 'style' strings since
* double quotes are used outside: e.g.:
* style="font-family:'DejaVu Sans'"
*/
{
++pos;
}
/*
* Problem with parsing of units em and ex, like font-size "1.2em" and "3.4ex"
* stringstream thinks they are in scientific "e" notation and fails
* Must be a better way using std::fixed, precision etc
*
* HACK for now is to strip off em and ex units and add them back at the end
*/
if (le > 2) {
}
else {
}
}
// libcroco uses %.17f for formatting... leading to trailing zeros or small rounding errors.
// CSSOStringStream is used here to write valid CSS (as in sp_style_write_string). This has
// the additional benefit of respecting the numerical precission set in the SVG Output
// preferences. We assume any numerical part comes first (if not, the whole string is copied).
double number = 0;
if (!number_valid) {
}
characters += temp;
characters += " ";
}
characters += temp;
//g_message("sp_repr_css_merge_from_decl looks like em or ex units %s --> %s", str_value, os.str().c_str());
}
}
/**
* Merges style properties as parsed by libcroco into an existing SPCSSAttr.
*
* \pre decl_list != NULL
*/
{
// read the decls from start to end, using tail recursion, so that latter declarations override
// (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
// because sp_repr_css_merge_from_decl sets properties unconditionally
}
}
/**
* Use libcroco to parse a string for CSS properties and then merge
* them into an existing SPCSSAttr.
*/
{
if (p != NULL) {
if (decl_list) {
}
}
}
/**
* Creates a new SPCSAttr with the values filled from a repr, merges in properties from the given
* SPCSAttr, and then replaces that SPCSAttr with the new one. This is called, for example, for
* each object in turn when a selection's style is updated via sp_desktop_set_style().
*/
{
}
{
}
}
/*
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:fileencoding=utf-8:textwidth=99 :