annotate src/styleengine.hh @ 659:920e6090d6d6

use output parameter in StyleEngine::computeValue() This way an assignment is avoided in case of an invalid or unsupported value for the given property. E.g. it is not allowed to specify a percentage for border-width.
author Johannes Hofmann <Johannes.Hofmann@gmx.de>
date Tue, 09 Dec 2008 20:09:35 +0100
parents ea961706be66
children 109eaf60aea2
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 #include "dw/core.hh"
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5 #include "doctree.hh"
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6 #include "css.hh"
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7 #include "cssparser.hh"
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8
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9 class StyleEngine : public Doctree {
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10 private:
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11 class Node : public DoctreeNode {
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12 public:
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13 dw::core::style::Style *style;
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14 dw::core::style::Style *wordStyle;
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15 const char *styleAttribute;
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16 bool inheritBackgroundColor;
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17 };
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18
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19 dw::core::Layout *layout;
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20 lout::misc::SimpleVector <Node> *stack;
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21 CssContext *cssContext;
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22
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23 dw::core::style::Style *style0 (CssPropertyList *nonCssHints = NULL);
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24 dw::core::style::Style *wordStyle0 (CssPropertyList *nonCssHints = NULL);
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25 void apply (dw::core::style::StyleAttrs *attrs, CssPropertyList *props);
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26 void computeValue (int *dest, CssLength value, dw::core::style::Font *font);
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27 void computeValue (int *dest, CssLength value, dw::core::style::Font *font,
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28 int percentageBase);
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29 void computeLength (dw::core::style::Length *dest, CssLength value, dw::core::style::Font *font);
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30
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31 public:
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32 StyleEngine (dw::core::Layout *layout);
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33 ~StyleEngine ();
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34
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35 /* Doctree interface */
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36 inline const DoctreeNode *top () {
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37 return stack->getRef (stack->size () - 1);
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38 };
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39
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40 inline const DoctreeNode *parent (const DoctreeNode *n) {
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41 if (n->depth > 1)
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42 return stack->getRef (n->depth - 1);
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43 else
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44 return NULL;
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45 };
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46
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47 void parse (const char *buf, int buflen, int order_count, CssOrigin origin);
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48 void startElement (int tag);
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49 void setId (const char *id);
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50 void setClass (const char *klass);
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51 void setStyle (const char *style);
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52 void endElement (int tag);
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53 void setPseudo (const char *pseudo);
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54 void setNonCssHints (CssPropertyList *nonCssHints);
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55 void inheritBackgroundColor ();
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56
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57 inline dw::core::style::Style *style () {
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58 dw::core::style::Style *s = stack->getRef (stack->size () - 1)->style;
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59 if (s)
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60 return s;
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61 else
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62 return style0 ();
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63 };
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64 inline dw::core::style::Style *wordStyle () {
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65 dw::core::style::Style *s = stack->getRef (stack->size () - 1)->wordStyle;
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66 if (s)
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67 return s;
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68 else
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69 return wordStyle0 ();
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70 };
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71
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72 };
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73
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74 #endif