#include "sp-string.h"

#include "style.h"

#include "xml/repr.h"

#include <iostream>

SPString::SPString() : SPObject() {

}

SPString::~SPString() {

}

void SPString::build(SPDocument *doc, Inkscape::XML::Node *repr) {

SPString* object = this;

object->read_content();

SPObject::build(doc, repr);

}

void SPString::release() {

SPObject::release();

}

void SPString::read_content() {

SPString* object = this;

SPString *string = SP_STRING(object);

string->string.clear();

//XML Tree being used directly here while it shouldn't be.

gchar const *xml_string = string->getRepr()->content();

// std::cout << ">" << (xml_string?xml_string:"Null") << "<" << std::endl;

// SVG2/CSS Text Level 3 'white-space' has five values.

// See: http://dev.w3.org/csswg/css-text/#white-space

// | New Lines | Spaces/Tabs | Text Wrapping

// ---------|------------|--------------|--------------

// normal | Collapes | Collapse | Wrap

// pre | Preserve | Preserve | No Wrap

// nowrap | Collapse | Collapse | No Wrap

// pre-wrap | Preserve | Preserve | Wrap

// pre-line | Preserve | Collapse | Wrap

// 'xml:space' has two values:

// 'default' which corresponds to 'normal' (without wrapping).

// 'preserve' which corresponds to 'pre' except new lines are converted to spaces.

// See algorithms described in svg 1.1 section 10.15

bool collapse_space = true;

bool collapse_line = true;

bool is_css = false;

// Strings don't have style, check parent for style

if( object->parent && object->parent->style ) {

if( object->parent->style->white_space.computed == SP_CSS_WHITE_SPACE_PRE ||

object->parent->style->white_space.computed == SP_CSS_WHITE_SPACE_PREWRAP ||

object->parent->style->white_space.computed == SP_CSS_WHITE_SPACE_PRELINE ) {

collapse_line = false;

}

if( object->parent->style->white_space.computed == SP_CSS_WHITE_SPACE_PRE ||

object->parent->style->white_space.computed == SP_CSS_WHITE_SPACE_PREWRAP ) {

collapse_space = false;

}

if( object->parent->style->white_space.computed != SP_CSS_WHITE_SPACE_NORMAL ) {

is_css = true; // If white-space not normal, we assume white-space is set.

}

}

if( !is_css ) {

// SVG 2: Use 'xml:space' only if 'white-space' not 'normal'.

if (object->xml_space.value == SP_XML_SPACE_PRESERVE) {

collapse_space = false;

}

}

bool white_space = false;

for ( ; *xml_string ; xml_string = g_utf8_next_char(xml_string) ) {

gunichar c = g_utf8_get_char(xml_string);

switch (c) {

case 0xd: // Carriage return

// XML Parsers convert 0xa, 0xd, 0xD 0xA to 0xA. CSS also follows this rule so we

// should never see 0xd.

std::cerr << "SPString: Carriage Return found! Argh!" << std::endl;

continue;

break;

case 0xa: // Line feed

if( collapse_line ) {

if( !is_css && collapse_space ) continue; // xml:space == 'default' strips LFs.

white_space = true; // Convert to space and collapse

} else {

string->string += c; // Preserve line feed

continue;

}

break;

case '\t': // Tab

if( collapse_space ) {

white_space = true; // Convert to space and collapse

} else {

string->string += c; // Preserve tab

continue;

}

break;

case ' ': // Space

if( collapse_space ) {

white_space = true; // Collapse white space

} else {

string->string += c; // Preserve space

continue;

}

break;

default:

if( white_space && (!string->string.empty() || (object->getPrev() != NULL))) {

string->string += ' ';

}

string->string += c;

white_space = false;

} // End switch

} // End loop

// Insert white space at end if more text follows

if (white_space && object->getRepr()->next() != NULL) { // can't use SPObject::getNext() when the SPObject tree is still being built

string->string += ' ';

}

// std::cout << ">" << string->string << "<" << std::endl;

object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

}

void SPString::update(SPCtx * /*ctx*/, unsigned /*flags*/) {

// if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG)) {

// /* Parent style or we ourselves changed, so recalculate */

// flags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B; // won't be "just a transformation" anymore, we're going to recompute "x" and "y" attributes

// }

}