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Diffstat (limited to 'src/css.hh')
| -rw-r--r-- | src/css.hh | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/src/css.hh b/src/css.hh new file mode 100644 index 00000000..515831e9 --- /dev/null +++ b/src/css.hh @@ -0,0 +1,313 @@ +#ifndef __CSS_HH__ +#define __CSS_HH__ + +#include "dw/core.hh" +#include "doctree.hh" + +/* Origin and weight. Used only internally.*/ +typedef enum { + CSS_PRIMARY_USER_AGENT, + CSS_PRIMARY_USER, + CSS_PRIMARY_AUTHOR, + CSS_PRIMARY_AUTHOR_IMPORTANT, + CSS_PRIMARY_USER_IMPORTANT, + CSS_PRIMARY_LAST, +} CssPrimaryOrder; + +/* + * Lengths are represented as int in the following way: + * + * +---+ - - - +---+---+- - - - - -+---+---+---+---+ + * | integer part | decimal fraction | type | + * +---+ - - - +---+---+- - - - - -+---+---+---+---+ + * n-1 19 18 3 2 1 0 + * + * | <------ fixed point value ------> | + * + * where type is one of the CSS_LENGTH_TYPE_* values. + */ + +typedef int CssLength; + +enum { + CSS_LENGTH_TYPE_PX, + CSS_LENGTH_TYPE_MM, /* "cm", "in", "pt" and "pc" are converted into + millimeters. */ + CSS_LENGTH_TYPE_EM, + CSS_LENGTH_TYPE_EX, + CSS_LENGTH_TYPE_PERCENTAGE, + CSS_LENGTH_TYPE_RELATIVE, /* This does not exist in CSS but + is used in HTML */ + CSS_LENGTH_TYPE_AUTO /* This can be used as a simple value. */ +}; + +#define CSS_CREATE_LENGTH(v, t) ( ( (int)((v) * (1 << 19)) & ~7 ) | (t) ) +#define CSS_LENGTH_VALUE(l) ( ( (float)((l) & ~7) ) / (1 << 19) ) +#define CSS_LENGTH_TYPE(l) ((l) & 7) + +/** + * \brief This class holds a CSS property and value pair. + */ +class CssProperty { + public: + typedef union { + int intVal; + const char *strVal; + } Value; + + typedef enum { + CSS_PROPERTY_BACKGROUND_ATTACHMENT, + CSS_PROPERTY_BACKGROUND_COLOR, + CSS_PROPERTY_BACKGROUND_IMAGE, + CSS_PROPERTY_BACKGROUND_POSITION, + CSS_PROPERTY_BACKGROUND_REPEAT, + CSS_PROPERTY_BORDER_BOTTOM_COLOR, + CSS_PROPERTY_BORDER_BOTTOM_STYLE, + CSS_PROPERTY_BORDER_BOTTOM_WIDTH, + CSS_PROPERTY_BORDER_COLLAPSE, + CSS_PROPERTY_BORDER_LEFT_COLOR, + CSS_PROPERTY_BORDER_LEFT_STYLE, + CSS_PROPERTY_BORDER_LEFT_WIDTH, + CSS_PROPERTY_BORDER_RIGHT_COLOR, + CSS_PROPERTY_BORDER_RIGHT_STYLE, + CSS_PROPERTY_BORDER_RIGHT_WIDTH, + CSS_PROPERTY_BORDER_SPACING, + CSS_PROPERTY_BORDER_TOP_COLOR, + CSS_PROPERTY_BORDER_TOP_STYLE, + CSS_PROPERTY_BORDER_TOP_WIDTH, + CSS_PROPERTY_BOTTOM, + CSS_PROPERTY_CAPTION_SIDE, + CSS_PROPERTY_CLEAR, + CSS_PROPERTY_CLIP, + CSS_PROPERTY_COLOR, + CSS_PROPERTY_CONTENT, + CSS_PROPERTY_COUNTER_INCREMENT, + CSS_PROPERTY_COUNTER_RESET, + CSS_PROPERTY_CURSOR, + CSS_PROPERTY_DIRECTION, + CSS_PROPERTY_DISPLAY, + CSS_PROPERTY_EMPTY_CELLS, + CSS_PROPERTY_FLOAT, + CSS_PROPERTY_FONT_FAMILY, + CSS_PROPERTY_FONT_SIZE, + CSS_PROPERTY_FONT_SIZE_ADJUST, + CSS_PROPERTY_FONT_STRETCH, + CSS_PROPERTY_FONT_STYLE, + CSS_PROPERTY_FONT_VARIANT, + CSS_PROPERTY_FONT_WEIGHT, + CSS_PROPERTY_HEIGHT, + CSS_PROPERTY_LEFT, + CSS_PROPERTY_LETTER_SPACING, + CSS_PROPERTY_LINE_HEIGHT, + CSS_PROPERTY_LIST_STYLE_IMAGE, + CSS_PROPERTY_LIST_STYLE_POSITION, + CSS_PROPERTY_LIST_STYLE_TYPE, + CSS_PROPERTY_MARGIN_BOTTOM, + CSS_PROPERTY_MARGIN_LEFT, + CSS_PROPERTY_MARGIN_RIGHT, + CSS_PROPERTY_MARGIN_TOP, + CSS_PROPERTY_MARKER_OFFSET, + CSS_PROPERTY_MARKS, + CSS_PROPERTY_MAX_HEIGHT, + CSS_PROPERTY_MAX_WIDTH, + CSS_PROPERTY_MIN_HEIGHT, + CSS_PROPERTY_MIN_WIDTH, + CSS_PROPERTY_OUTLINE_COLOR, + CSS_PROPERTY_OUTLINE_STYLE, + CSS_PROPERTY_OUTLINE_WIDTH, + CSS_PROPERTY_OVERFLOW, + CSS_PROPERTY_PADDING_BOTTOM, + CSS_PROPERTY_PADDING_LEFT, + CSS_PROPERTY_PADDING_RIGHT, + CSS_PROPERTY_PADDING_TOP, + CSS_PROPERTY_POSITION, + CSS_PROPERTY_QUOTES, + CSS_PROPERTY_RIGHT, + CSS_PROPERTY_TEXT_ALIGN, + CSS_PROPERTY_TEXT_DECORATION, + CSS_PROPERTY_TEXT_INDENT, + CSS_PROPERTY_TEXT_SHADOW, + CSS_PROPERTY_TEXT_TRANSFORM, + CSS_PROPERTY_TOP, + CSS_PROPERTY_UNICODE_BIDI, + CSS_PROPERTY_VERTICAL_ALIGN, + CSS_PROPERTY_VISIBILITY, + CSS_PROPERTY_WHITE_SPACE, + CSS_PROPERTY_WIDTH, + CSS_PROPERTY_WORD_SPACING, + CSS_PROPERTY_Z_INDEX, + CSS_PROPERTY_X_LINK, + CSS_PROPERTY_X_COLSPAN, + CSS_PROPERTY_X_ROWSPAN, + PROPERTY_X_LINK, + PROPERTY_X_IMG, + PROPERTY_X_TOOLTIP, + CSS_PROPERTY_LAST + } Name; + + typedef enum { + CSS_FONT_WEIGHT_LIGHTER = -1, + CSS_FONT_WEIGHT_BOLDER = -2, + CSS_FONT_WEIGHT_STEP = 300, + /* Some special font weights. */ + CSS_FONT_WEIGHT_LIGHT = 100, + CSS_FONT_WEIGHT_NORMAL = 400, + CSS_FONT_WEIGHT_BOLD = 700, + CSS_FONT_WEIGHT_MIN = 100, + CSS_FONT_WEIGHT_MAX = 900, + } FontWeightExtensions; + + Name name; + Value value; + + void print (); +}; + +/** + * \brief A list of CssProperty objects. + */ +class CssPropertyList : public lout::misc::SimpleVector <CssProperty> { + int refCount; + + public: + CssPropertyList() : lout::misc::SimpleVector <CssProperty> (1) { + refCount = 0; + }; + CssPropertyList(const CssPropertyList &p) : + lout::misc::SimpleVector <CssProperty> (p) { + refCount = 0; + }; + + void set (CssProperty::Name name, CssProperty::Value value); + void set (CssProperty::Name name, const char *value) { + CssProperty::Value v; + v.strVal = value; + set (name, v); + }; + void set (CssProperty::Name name, int value) { + CssProperty::Value v; + v.intVal = value; + set (name, v); + }; + void apply (CssPropertyList *props); + void print (); + inline void ref () { refCount++; } + inline void unref () { if(--refCount == 0) delete this; } +}; + +class CssSimpleSelector { + public: + enum { + ELEMENT_NONE = -1, + ELEMENT_ANY = -2, + }; + + int element; + const char *klass, *pseudo, *id; + + bool match (const DoctreeNode *node); + void print (); +}; + +/** + * \brief CSS selector class. + * \todo Implement missing selector options. + */ +class CssSelector { + public: + typedef enum { + DESCENDENT, + CHILD, + ADJACENT_SIBLING, + } Combinator; + + private: + struct CombinatorAndSelector { + Combinator combinator; + CssSimpleSelector selector; + }; + + int refCount; + lout::misc::SimpleVector <struct CombinatorAndSelector> *selectorList; + + public: + CssSelector (int element = CssSimpleSelector::ELEMENT_ANY, + const char *klass = NULL, + const char *pseudo = NULL, const char *id = NULL); + ~CssSelector (); + void addSimpleSelector (Combinator c, + int element = CssSimpleSelector::ELEMENT_ANY, + const char *klass = NULL, + const char *pseudo = NULL, const char *id=NULL); + inline CssSimpleSelector *top () { + return &selectorList->getRef (selectorList->size () - 1)->selector; + }; + + bool match (Doctree *dt); + void print (); + inline void ref () { refCount++; } + inline void unref () { if(--refCount == 0) delete this; } +}; + +/** + * \brief A CssSelector CssPropertyList pair. + * The CssPropertyList is applied if the CssSelector matches. + */ +class CssRule { + private: + int refCount; + CssPropertyList *props; + + public: + CssSelector *selector; + + CssRule (CssSelector *selector, CssPropertyList *props); + ~CssRule (); + + void apply (CssPropertyList *props, Doctree *docTree); + inline void ref () { refCount++; } + inline void unref () { if(--refCount == 0) delete this; } + void print (); +}; + +/** + * \brief A list of CssRules. + * In apply () all matching rules are applied. + */ +class CssStyleSheet { + private: + static const int ntags = 90; // \todo replace 90 + lout::misc::SimpleVector <CssRule*> *ruleTable[ntags]; + + public: + CssStyleSheet(); + ~CssStyleSheet(); + void addRule (CssRule *rule); + void addRule (CssSelector *selector, CssPropertyList *props); + void apply (CssPropertyList *props, Doctree *docTree); +}; + +/** + * \brief A set of CssStyleSheets. + */ +class CssContext { + private: + static CssStyleSheet *userAgentStyle; + static CssStyleSheet *userStyle; + static CssStyleSheet *userImportantStyle; + CssStyleSheet *sheet[CSS_PRIMARY_USER_IMPORTANT + 1]; + + void buildUserAgentStyle (); + void buildUserStyle (); + + public: + CssContext (); + ~CssContext (); + + void addRule (CssRule *rule, CssPrimaryOrder order); + void apply (CssPropertyList *props, + Doctree *docTree, + CssPropertyList *tagStyle, CssPropertyList *nonCssHints); +}; + +#endif |