annotate src/styleengine.hh @ 1494:9225a90ad7dd

make Doctree a non-virtual class Doctree now is a proper class with it's own implementation. StyleEngine no longer needs to provide the Doctree interface itself. This hopefully make the code easier to understand and should also be a bit faster as no virtual methods are involved.
author Johannes Hofmann <Johannes.Hofmann@gmx.de>
date Thu, 07 Jan 2010 16:23:05 +0100
parents 6ed936726b50
children b27cf7eb15b6
rev   line source
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96713a0f5d8b css.[ch][ch] -> styleengine.[ch][ch]
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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 class Node {
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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 Doctree *doctree;
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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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45 void computeBorderWidth (int *dest, CssProperty *p,
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46 dw::core::style::Font *font);
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47
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48 public:
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49 StyleEngine (dw::core::Layout *layout);
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50 ~StyleEngine ();
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51
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52 void parse (DilloHtml *html, DilloUrl *url, const char *buf, int buflen,
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53 CssOrigin origin);
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54 void startElement (int tag);
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55 void startElement (const char *tagname);
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56 void setId (const char *id);
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57 const char * getId () { return doctree->top ()->id; };
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58 void setClass (const char *klass);
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59 void setStyle (const char *style);
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60 void endElement (int tag);
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61 void setPseudoLink ();
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62 void setPseudoVisited ();
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63 void setNonCssHints (CssPropertyList *nonCssHints);
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64 void inheritBackgroundColor (); /* \todo get rid of this somehow */
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65 dw::core::style::Style *backgroundStyle ();
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67 inline dw::core::style::Style *style () {
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68 dw::core::style::Style *s = stack->getRef (stack->size () - 1)->style;
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69 if (s)
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70 return s;
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71 else
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72 return style0 ();
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73 };
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74
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75 inline dw::core::style::Style *wordStyle () {
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76 dw::core::style::Style *s = stack->getRef(stack->size()-1)->wordStyle;
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77 if (s)
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78 return s;
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79 else
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80 return wordStyle0 ();
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81 };
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82 };
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83
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84 #endif