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/*
* File: styleengine.cc
*
* Copyright 2008 Jorge Arellano Cid <jcid@dillo.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*/
#include <stdio.h>
#include "styleengine.hh"
using namespace dw::core::style;
StyleEngine::StyleEngine (dw::core::Layout *layout) {
StyleAttrs style_attrs;
FontAttrs font_attrs;
stack = new lout::misc::SimpleVector <Node> (1);
cssContext = new CssContext ();
this->layout = layout;
stack->increase ();
Node *n = stack->getRef (stack->size () - 1);
/* Create a dummy font, attribute, and tag for the bottom of the stack. */
font_attrs.name = "helvetica";
font_attrs.size = 12;
font_attrs.weight = 400;
font_attrs.style = FONT_STYLE_NORMAL;
style_attrs.initValues ();
style_attrs.font = Font::create (layout, &font_attrs);
style_attrs.color = Color::createSimple (layout, 0);
n->style = Style::create (layout, &style_attrs);
}
StyleEngine::~StyleEngine () {
delete stack;
}
/**
* \brief tell the styleEngine that a new html element has started.
*/
void StyleEngine::startElement (int element, const char *id, const char *klass,
const char *style) {
// fprintf(stderr, "===> START %d %s %s %s\n", element, id, klass, style);
if (stack->getRef (stack->size () - 1)->style == NULL)
style0 ();
stack->increase ();
Node *n = stack->getRef (stack->size () - 1);
n->style = NULL;
n->depth = stack->size ();
n->element = element;
n->id = id;
n->klass = klass;
n->pseudo = NULL;
n->styleAttribute = style;
}
/**
* \brief set properties that were definded using (mostly deprecated) HTML
* attributes (e.g. bgColor).
*/
void StyleEngine::setNonCssProperties (CssPropertyList *props) {
if (stack->getRef (stack->size () - 1)->style)
stack->getRef (stack->size () - 1)->style->unref ();
style0 (props); // evaluate now, so caller can free props
}
/**
* \brief set the CSS pseudo class (e.g. "link", "visited").
*/
void StyleEngine::setPseudoClass (const char *pseudo) {
stack->getRef (stack->size () - 1)->pseudo = pseudo;
}
/**
* \brief tell the styleEngine that a html element has ended.
*/
void StyleEngine::endElement (int element) {
// fprintf(stderr, "===> END %d\n", element);
assert (stack->size () > 1);
assert (element == stack->getRef (stack->size () - 1)->element);
Node *n = stack->getRef (stack->size () - 1);
if (n->style)
n->style->unref ();
stack->setSize (stack->size () - 1);
}
/**
* \brief Make changes to StyleAttrs attrs according to CssPropertyList props.
*/
void StyleEngine::apply (StyleAttrs *attrs, CssPropertyList *props) {
FontAttrs fontAttrs = *attrs->font;
for (int i = 0; i < props->size (); i++) {
CssProperty *p = props->getRef (i);
switch (p->name) {
/* \todo missing cases */
case CssProperty::CSS_PROPERTY_BACKGROUND_COLOR:
attrs->backgroundColor =
Color::createSimple (layout, p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_BORDER_BOTTOM_COLOR:
attrs->borderColor.bottom =
Color::createSimple (layout, p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_BORDER_COLOR:
attrs->setBorderColor (Color::createSimple (layout, p->value.intVal));
break;
case CssProperty::CSS_PROPERTY_BORDER_BOTTOM_STYLE:
attrs->borderStyle.bottom = (BorderStyle) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_BORDER_STYLE:
attrs->setBorderStyle ((BorderStyle) p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_BORDER_WIDTH:
attrs->borderWidth.setVal (p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_BORDER_SPACING:
attrs->hBorderSpacing = p->value.intVal;
attrs->vBorderSpacing = p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_COLOR:
attrs->color = Color::createSimple (layout, p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_CURSOR:
attrs->cursor = (Cursor) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_FONT_FAMILY:
fontAttrs.name = p->value.strVal;
break;
case CssProperty::CSS_PROPERTY_FONT_SIZE:
fontAttrs.size = p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_FONT_STYLE:
fontAttrs.style = (FontStyle) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_FONT_WEIGHT:
switch (p->value.intVal) {
case CssProperty::CSS_FONT_WEIGHT_LIGHTER:
fontAttrs.weight -= CssProperty::CSS_FONT_WEIGHT_STEP;
break;
case CssProperty::CSS_FONT_WEIGHT_BOLDER:
fontAttrs.weight += CssProperty::CSS_FONT_WEIGHT_STEP;
break;
default:
fontAttrs.weight = p->value.intVal;
break;
}
if (fontAttrs.weight < CssProperty::CSS_FONT_WEIGHT_MIN)
fontAttrs.weight = CssProperty::CSS_FONT_WEIGHT_MIN;
if (fontAttrs.weight > CssProperty::CSS_FONT_WEIGHT_MAX)
fontAttrs.weight = CssProperty::CSS_FONT_WEIGHT_MAX;
break;
case CssProperty::CSS_PROPERTY_LIST_STYLE_TYPE:
attrs->listStyleType = (ListStyleType) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_MARGIN:
attrs->margin.setVal (p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_PADDING:
attrs->padding.setVal (p->value.intVal);
break;
case CssProperty::CSS_PROPERTY_TEXT_ALIGN:
attrs->textAlign = (TextAlignType) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_TEXT_DECORATION:
attrs->textDecoration |= p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_VERTICAL_ALIGN:
attrs->valign = (VAlignType) p->value.intVal;
break;
case CssProperty::CSS_PROPERTY_WIDTH:
attrs->width = p->value.intVal;
break;
case CssProperty::PROPERTY_X_LINK:
attrs->x_link = p->value.intVal;
break;
case CssProperty::PROPERTY_X_IMG:
attrs->x_img = p->value.intVal;
break;
default:
break;
}
}
attrs->font = Font::create (layout, &fontAttrs);
}
/**
* \brief Create a new style object based on the previously opened / closed
* HTML elements and the nonCssProperties that have been set.
* This method is private. Call style() to get a current style object.
*/
Style * StyleEngine::style0 (CssPropertyList *nonCssProperties) {
CssPropertyList props;
CssPropertyList *tagStyleProps = CssPropertyList::parse (
stack->getRef (stack->size () - 1)->styleAttribute);
// get previous style from the stack
StyleAttrs attrs = *stack->getRef (stack->size () - 2)->style;
// reset values that are not inherited according to CSS
attrs.resetValues ();
cssContext->apply (&props, this, tagStyleProps, nonCssProperties);
apply (&attrs, &props);
stack->getRef (stack->size () - 1)->style = Style::create (layout, &attrs);
return stack->getRef (stack->size () - 1)->style;
}
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