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/*
* File: styleengine.hh
*
* Copyright 2008-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
* Copyright 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
*
* 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.
*/
#ifndef __STYLEENGINE_HH__
#define __STYLEENGINE_HH__
class StyleEngine;
#include "dw/core.hh"
#include "doctree.hh"
#include "css.hh"
#include "cssparser.hh"
/**
* \brief This class provides the glue between HTML parser and CSS subsystem.
*
* It maintains a document tree and creates and caches style objects for use
* by the HTML parser.
* The HTML parser in turn informs StyleEngine about opened or closed
* HTML elements and their attributes via the startElement() / endElement()
* methods.
*/
class StyleEngine {
private:
struct Node {
CssPropertyList *styleAttrProperties;
CssPropertyList *styleAttrPropertiesImportant;
CssPropertyList *nonCssProperties;
dw::core::style::Style *style;
dw::core::style::Style *wordStyle;
dw::core::style::Style *backgroundStyle;
bool inheritBackgroundColor;
bool displayNone;
DoctreeNode *doctreeNode;
};
dw::core::Layout *layout;
lout::misc::SimpleVector <Node> *stack;
CssContext *cssContext;
Doctree *doctree;
int importDepth;
float dpmm;
float zoom;
DilloUrl *pageUrl, *baseUrl;
void stackPush ();
void stackPop ();
void buildUserStyle ();
dw::core::style::Style *style0 (int i, BrowserWindow *bw);
dw::core::style::Style *wordStyle0 (BrowserWindow *bw);
inline void setNonCssHint(CssPropertyName name, CssValueType type,
CssPropertyValue value) {
Node *n = stack->getRef (stack->size () - 1);
if (!n->nonCssProperties)
n->nonCssProperties = new CssPropertyList (true);
n->nonCssProperties->set(name, type, value);
}
void preprocessAttrs (dw::core::style::StyleAttrs *attrs);
void postprocessAttrs (dw::core::style::StyleAttrs *attrs);
void apply (int i, dw::core::style::StyleAttrs *attrs,
CssPropertyList *props, BrowserWindow *bw);
bool computeValue (int *dest, CssLength value,
dw::core::style::Font *font);
bool computeValue (int *dest, CssLength value,
dw::core::style::Font *font, int percentageBase);
bool computeLength (dw::core::style::Length *dest, CssLength value,
dw::core::style::Font *font);
void computeBorderWidth (int *dest, CssProperty *p,
dw::core::style::Font *font);
public:
static void init ();
StyleEngine (dw::core::Layout *layout,
const DilloUrl *pageUrl, const DilloUrl *baseUrl, float zoom);
~StyleEngine ();
void parse (DilloHtml *html, DilloUrl *url, const char *buf, int buflen,
CssOrigin origin);
void startElement (int tag, BrowserWindow *bw);
void startElement (const char *tagname, BrowserWindow *bw);
void setId (const char *id);
const char * getId () { return doctree->top ()->id; };
void setClass (const char *klass);
void setStyle (const char *style);
void endElement (int tag);
void setPseudoLink ();
void setPseudoVisited ();
inline void setNonCssHint(CssPropertyName name, CssValueType type,
int value) {
CssPropertyValue v;
v.intVal = value;
setNonCssHint (name, type, v);
}
inline void setNonCssHint(CssPropertyName name, CssValueType type,
const char *value) {
CssPropertyValue v;
v.strVal = dStrdup(value);
setNonCssHint (name, type, v);
}
void inheritNonCssHints ();
void clearNonCssHints ();
void restyle (BrowserWindow *bw);
void inheritBackgroundColor (); /* \todo get rid of this somehow */
dw::core::style::Style *backgroundStyle (BrowserWindow *bw);
dw::core::style::Color *backgroundColor ();
dw::core::style::StyleImage *backgroundImage
(dw::core::style::BackgroundRepeat *bgRepeat,
dw::core::style::BackgroundAttachment *bgAttachment,
dw::core::style::Length *bgPositionX,
dw::core::style::Length *bgPositionY);
inline dw::core::style::Style *style (BrowserWindow *bw) {
dw::core::style::Style *s = stack->getRef (stack->size () - 1)->style;
if (s)
return s;
else
return style0 (stack->size () - 1, bw);
};
inline dw::core::style::Style *wordStyle (BrowserWindow *bw) {
dw::core::style::Style *s = stack->getRef(stack->size()-1)->wordStyle;
if (s)
return s;
else
return wordStyle0 (bw);
};
};
#endif
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