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189 lines
6.5 KiB
189 lines
6.5 KiB
/*
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* This file is part of the html renderer for KDE.
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*
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* Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
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* (C) 2000 Antti Koivisto (koivisto@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef KHTMLFONT_H
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#define KHTMLFONT_H
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#include <tqfont.h>
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#include <tqfontmetrics.h>
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#include <tqmap.h>
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#include <tqpainter.h>
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class QFontDatabase;
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class QPaintDeviceMetrics;
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namespace khtml
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{
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class RenderStyle;
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class CSSStyleSelector;
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class FontDef
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{
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public:
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FontDef()
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: size( 0 ), italic( false ), smallCaps( false ), weight( 50 ) {}
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bool operator == ( const FontDef &other ) const {
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return ( family == other.family &&
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size == other.size &&
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italic == other.italic &&
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smallCaps == other.smallCaps &&
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weight == other.weight );
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}
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TQString family;
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short int size;
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bool italic : 1;
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bool smallCaps : 1;
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unsigned int weight : 8;
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};
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class Font
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{
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friend class RenderStyle;
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friend class CSSStyleSelector;
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public:
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Font() : fontDef(), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 ) {}
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Font( const FontDef &fd )
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: fontDef( fd ), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 )
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{}
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Font(const Font& o)
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: fontDef(o.fontDef), f(o.f), fm(o.fm), scFont(o.scFont), letterSpacing(o.letterSpacing), wordSpacing(o.wordSpacing) { if (o.scFont) scFont = new TQFont(*o.scFont); }
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~Font() { delete scFont; }
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bool operator == ( const Font &other ) const {
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return (fontDef == other.fontDef &&
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letterSpacing == other.letterSpacing &&
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wordSpacing == other.wordSpacing );
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}
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const FontDef& getFontDef() const { return fontDef; }
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void update( TQPaintDeviceMetrics *devMetrics ) const;
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/**
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* Draws a piece from the given piece of text.
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* @param p painter
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* @param x x-coordinate to begin drawing, always denotes leftmost position
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* @param y y-coordinate of baseline of text
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* @param str string to draw a piece from
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* @param slen total length of string
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* @param pos zero-based offset of beginning of piece
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* @param len length of piece
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* @param width additional pixels to be distributed equally among all
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* spaces
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* @param d text direction
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* @param from begin with this position relative to @p pos, -1 to start
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* at @p pos
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* @param to stop before this position relative to @p pos, -1 to use full
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* length of piece
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* @param bg if valid, fill the background of the drawn piece with this
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* color
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* @param uy y-coordinate of top position, used for background and text
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* decoration painting
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* @param h total height of line, only used for background and text
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* decoration painting
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* @param deco combined text decoration (see Decoration)
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*/
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void drawText( TQPainter *p, int x, int y, TQChar *str, int slen, int pos, int len, int width,
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TQPainter::TextDirection d, int from=-1, int to=-1, TQColor bg=TQColor(),
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int uy=-1, int h=-1, int deco=0 ) const;
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/** returns the width of the given string chunk in pixels.
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*
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* The method also considers various styles like text-align and font-variant
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* @param str pointer to string
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* @param slen total length of string
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* @param pos zero-based position in string where to start measuring
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* @param len count of characters up to which the width should be determined
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* @param start starting position of inline text box within str, only
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* used when toAdd is specified.
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* @param end ending position of inline text box within str, only
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* used when toAdd is specified.
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* @param toAdd amount of pixels to distribute evenly among all spaces of
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* str. Note that toAdd applies to all spaces within str, but only those
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* within [pos, pos+len) are counted towards the width.
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*/
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int width( TQChar *str, int slen, int pos, int len, int start = 0, int end = 0, int toAdd = 0 ) const;
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/** return the width of the given char in pixels.
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*
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* The method also considers various styles like text-align and font-variant
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* @param str pointer to string
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* @param slen total length of string
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* @param pos zero-based position of char in string
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*/
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int width( TQChar *str, int slen, int pos) const;
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/** Text decoration constants.
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*
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* The enumeration constant values match those of ETextDecoration, but only
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* a subset is supported.
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*/
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enum Decoration { UNDERLINE = 0x1, OVERLINE = 0x2, LINE_THROUGH= 0x4 };
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// Keep in sync with ETextDecoration
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/** draws text decoration
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* @param p painter
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* @param x x-coordinate
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* @param y top y-coordinate of line box
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* @param baseline baseline
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* @param width length of decoration in pixels
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* @param height height of line box
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* @param deco decoration to be drawn (see Decoration). The enumeration
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* constants may be combined.
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*/
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void drawDecoration(TQPainter *p, int x, int y, int baseline, int width, int height, int deco) const;
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/** returns letter spacing
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*/
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int getLetterSpacing() const { return letterSpacing; }
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/** returns word spacing
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*/
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int getWordSpacing() const { return wordSpacing; }
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private:
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mutable FontDef fontDef;
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mutable TQFont f;
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mutable TQFontMetrics fm;
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mutable TQFont *scFont;
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short letterSpacing;
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short wordSpacing;
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struct ScalKey;
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enum ScalInfo {
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Unknown,
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No,
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Yes
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};
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static TQMap<ScalKey, ScalInfo>* scalCache;
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static TQMap<ScalKey, TQValueList<int> >* scalSizesCache;
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static bool isFontScalable(TQFontDatabase& db, const TQFont& font);
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};
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} // namespace
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#endif
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