annotate src/styleengine.hh @ 1746:ef983c0fe908

fix Style leaks in StyleEngine
author Johannes Hofmann <Johannes.Hofmann@gmx.de>
date Sun, 17 Oct 2010 18:38:52 +0200
parents 6ff5d5aeb9a5
children 4779a3d891a1
rev   line source
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1 #ifndef __STYLEENGINE_HH__
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2 #define __STYLEENGINE_HH__
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3
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4 class StyleEngine;
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5
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6 #include "dw/core.hh"
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7 #include "doctree.hh"
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8 #include "css.hh"
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9 #include "cssparser.hh"
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10
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11 /**
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12 * \brief This class provides the glue between HTML parser and CSS subsystem.
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13 *
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14 * It maintains a document tree and creates and caches style objects for use
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15 * by the HTML parser.
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16 * The HTML parser in turn informs StyleEngine about opened or closed
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17 * HTML elements and their attributes via the startElement() / endElement()
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18 * methods.
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19 */
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20 class StyleEngine {
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21 private:
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22 struct Node {
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23 CssPropertyList *styleAttrProperties;
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24 CssPropertyList *nonCssProperties;
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25 dw::core::style::Style *style;
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26 dw::core::style::Style *wordStyle;
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27 dw::core::style::Style *backgroundStyle;
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28 bool inheritBackgroundColor;
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29 DoctreeNode *doctreeNode;
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30 };
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31
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32 dw::core::Layout *layout;
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33 lout::misc::SimpleVector <Node> *stack;
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34 CssContext *cssContext;
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35 Doctree *doctree;
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36 int importDepth;
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37
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38 dw::core::style::Style *style0 (int i);
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39 dw::core::style::Style *wordStyle0 ();
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40 inline void setNonCssHint(CssPropertyName name, CssValueType type,
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41 CssPropertyValue value) {
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42 Node *n = stack->getRef (stack->size () - 1);
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43
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44 if (!n->nonCssProperties)
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45 n->nonCssProperties = new CssPropertyList (true);
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46 n->nonCssProperties->set(name, type, value);
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47 }
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48 void preprocessAttrs (dw::core::style::StyleAttrs *attrs);
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49 void postprocessAttrs (dw::core::style::StyleAttrs *attrs);
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50 void apply (int i, dw::core::style::StyleAttrs *attrs, CssPropertyList *props);
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51 bool computeValue (int *dest, CssLength value,
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52 dw::core::style::Font *font);
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53 bool computeValue (int *dest, CssLength value,
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54 dw::core::style::Font *font, int percentageBase);
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55 bool computeLength (dw::core::style::Length *dest, CssLength value,
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56 dw::core::style::Font *font);
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57 void computeBorderWidth (int *dest, CssProperty *p,
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58 dw::core::style::Font *font);
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59
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60 public:
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61 StyleEngine (dw::core::Layout *layout);
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62 ~StyleEngine ();
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63
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64 void parse (DilloHtml *html, DilloUrl *url, const char *buf, int buflen,
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65 CssOrigin origin);
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66 void startElement (int tag);
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67 void startElement (const char *tagname);
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68 void setId (const char *id);
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69 const char * getId () { return doctree->top ()->id; };
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70 void setClass (const char *klass);
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71 void setStyle (const char *style);
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72 void endElement (int tag);
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73 void setPseudoLink ();
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74 void setPseudoVisited ();
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75 inline void setNonCssHint(CssPropertyName name, CssValueType type,
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76 int value) {
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77 CssPropertyValue v;
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78 v.intVal = value;
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79 setNonCssHint (name, type, v);
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80 }
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81 inline void setNonCssHint(CssPropertyName name, CssValueType type,
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82 const char *value) {
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83 CssPropertyValue v;
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84 v.strVal = dStrdup(value);
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85 setNonCssHint (name, type, v);
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86 }
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87 void inheritNonCssHints ();
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88 void clearNonCssHints ();
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89 void restyle ();
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90 void inheritBackgroundColor (); /* \todo get rid of this somehow */
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91 dw::core::style::Style *backgroundStyle ();
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92 dw::core::style::Color *backgroundColor ();
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93
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94 inline dw::core::style::Style *style () {
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95 dw::core::style::Style *s = stack->getRef (stack->size () - 1)->style;
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96 if (s)
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97 return s;
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98 else
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99 return style0 (stack->size () - 1);
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100 };
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101
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102 inline dw::core::style::Style *wordStyle () {
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103 dw::core::style::Style *s = stack->getRef(stack->size()-1)->wordStyle;
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104 if (s)
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105 return s;
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106 else
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107 return wordStyle0 ();
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108 };
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109 };
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110
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111 #endif