annotate src/styleengine.hh @ 1049:a913df1621ac

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author Johannes Hofmann <Johannes.Hofmann@gmx.de>
date Thu, 23 Apr 2009 11:49:25 +0200
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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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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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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 cashes 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 : public Doctree {
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21 private:
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22 class Node : public DoctreeNode {
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23 public:
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24 dw::core::style::Style *style;
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25 dw::core::style::Style *wordStyle;
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26 const char *styleAttribute;
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27 bool inheritBackgroundColor;
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28 };
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29
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30 dw::core::Layout *layout;
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31 lout::misc::SimpleVector <Node> *stack;
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32 CssContext *cssContext;
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33 int num;
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34 int importDepth;
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35
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36 dw::core::style::Style *style0 (CssPropertyList *nonCssHints = NULL);
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37 dw::core::style::Style *wordStyle0 (CssPropertyList *nonCssHints = NULL);
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38 void apply (dw::core::style::StyleAttrs *attrs, CssPropertyList *props);
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39 bool computeValue (int *dest, CssLength value,
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40 dw::core::style::Font *font);
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41 bool computeValue (int *dest, CssLength value,
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42 dw::core::style::Font *font, int percentageBase);
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43 bool computeLength (dw::core::style::Length *dest, CssLength value,
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44 dw::core::style::Font *font);
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46 public:
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47 StyleEngine (dw::core::Layout *layout);
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48 ~StyleEngine ();
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49
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50 /* Doctree interface */
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51 inline const DoctreeNode *top () {
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52 return stack->getRef (stack->size () - 1);
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53 };
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54
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55 inline const DoctreeNode *parent (const DoctreeNode *n) {
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56 if (n->depth > 1)
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57 return stack->getRef (n->depth - 1);
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58 else
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59 return NULL;
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60 };
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61
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62 void parse (DilloHtml *html, DilloUrl *url, const char *buf, int buflen,
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63 CssOrigin origin);
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64 void startElement (int tag);
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65 void startElement (const char *tagname);
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66 void setId (const char *id);
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67 const char * getId () { return top ()->id; };
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68 void setClass (const char *klass);
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69 void setStyle (const char *style);
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70 void endElement (int tag);
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71 void setPseudoLink ();
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72 void setPseudoVisited ();
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73 void setNonCssHints (CssPropertyList *nonCssHints);
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74 void inheritBackgroundColor (); /* \todo get rid of this somehow */
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75 dw::core::style::Style *backgroundStyle ();
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77 inline dw::core::style::Style *style () {
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78 dw::core::style::Style *s = stack->getRef (stack->size () - 1)->style;
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79 if (s)
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80 return s;
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81 else
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82 return style0 ();
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83 };
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84
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85 inline dw::core::style::Style *wordStyle () {
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86 dw::core::style::Style *s = stack->getRef(stack->size()-1)->wordStyle;
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87 if (s)
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88 return s;
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89 else
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90 return wordStyle0 ();
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91 };
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92 };
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93
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94 #endif