Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 188 insertions, 0 deletions

diff --git a/khtml/rendering/font.h b/khtml/rendering/font.h
new file mode 100644
index 000000000..c35ab53aa
--- /dev/null
+++ b/khtml/rendering/font.h
@@ -0,0 +1,188 @@
+/*
+ * This file is part of the html renderer for KDE.
+ *
+ * Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
+ *           (C) 2000 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2000 Dirk Mueller (mueller@kde.org)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef KHTMLFONT_H
+#define KHTMLFONT_H
+
+#include <qfont.h>
+#include <qfontmetrics.h>
+#include <qmap.h>
+#include <qpainter.h>
+
+class QFontDatabase;
+class QPaintDeviceMetrics;
+
+namespace khtml
+{
+class RenderStyle;
+class CSSStyleSelector;
+
+class FontDef
+{
+public:
+    FontDef()
+        : size( 0 ), italic( false ), smallCaps( false ), weight( 50 ) {}
+    bool operator == ( const FontDef &other ) const {
+        return ( family == other.family &&
+                 size == other.size &&
+                 italic == other.italic &&
+                 smallCaps == other.smallCaps &&
+                 weight == other.weight );
+    }
+
+    QString family;
+    short int size;
+    bool italic 		: 1;
+    bool smallCaps 		: 1;
+    unsigned int weight 		: 8;
+};
+
+
+class Font
+{
+    friend class RenderStyle;
+    friend class CSSStyleSelector;
+
+public:
+    Font() : fontDef(), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 ) {}
+    Font( const FontDef &fd )
+        :  fontDef( fd ), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 )
+        {}
+    Font(const Font& o)
+        : fontDef(o.fontDef), f(o.f), fm(o.fm), scFont(o.scFont), letterSpacing(o.letterSpacing), wordSpacing(o.wordSpacing) { if (o.scFont) scFont = new QFont(*o.scFont); }
+    ~Font() { delete scFont; }
+
+    bool operator == ( const Font &other ) const {
+        return (fontDef == other.fontDef &&
+                letterSpacing == other.letterSpacing &&
+                wordSpacing == other.wordSpacing );
+    }
+
+    const FontDef& getFontDef() const { return fontDef; }
+
+    void update( QPaintDeviceMetrics *devMetrics ) const;
+
+    /**
+     * Draws a piece from the given piece of text.
+     * @param p painter
+     * @param x x-coordinate to begin drawing, always denotes leftmost position
+     * @param y y-coordinate of baseline of text
+     * @param str string to draw a piece from
+     * @param slen total length of string
+     * @param pos zero-based offset of beginning of piece
+     * @param len length of piece
+     * @param width additional pixels to be distributed equally among all
+     *		spaces
+     * @param d text direction
+     * @param from begin with this position relative to @p pos, -1 to start
+     *		at @p pos
+     * @param to stop before this position relative to @p pos, -1 to use full
+     *		length of piece
+     * @param bg if valid, fill the background of the drawn piece with this
+     *		color
+     * @param uy y-coordinate of top position, used for background and text
+     *		decoration painting
+     * @param h total height of line, only used for background and text
+     *		decoration painting
+     * @param deco combined text decoration (see Decoration)
+     */
+    void drawText( QPainter *p, int x, int y, QChar *str, int slen, int pos, int len, int width,
+                   QPainter::TextDirection d, int from=-1, int to=-1, QColor bg=QColor(),
+		   int uy=-1, int h=-1, int deco=0 ) const;
+
+    /** returns the width of the given string chunk in pixels.
+     *
+     * The method also considers various styles like text-align and font-variant
+     * @param str pointer to string
+     * @param slen total length of string
+     * @param pos zero-based position in string where to start measuring
+     * @param len count of characters up to which the width should be determined
+     * @param start starting position of inline text box within str, only
+     * used when toAdd is specified.
+     * @param end ending position of inline text box within str, only
+     * used when toAdd is specified.
+     * @param toAdd amount of pixels to distribute evenly among all spaces of
+     * str. Note that toAdd applies to all spaces within str, but only those
+     * within [pos, pos+len) are counted towards the width.
+     */
+    int width( QChar *str, int slen, int pos, int len, int start = 0, int end = 0, int toAdd = 0 ) const;
+    /** return the width of the given char in pixels.
+     *
+     * The method also considers various styles like text-align and font-variant
+     * @param str pointer to string
+     * @param slen total length of string
+     * @param pos zero-based position of char in string
+     */
+    int width( QChar *str, int slen, int pos) const;
+
+    /** Text decoration constants.
+     *
+     * The enumeration constant values match those of ETextDecoration, but only
+     * a subset is supported.
+     */
+    enum Decoration { UNDERLINE = 0x1, OVERLINE = 0x2, LINE_THROUGH= 0x4 };
+    // Keep in sync with ETextDecoration
+
+    /** draws text decoration
+     * @param p painter
+     * @param x x-coordinate
+     * @param y top y-coordinate of line box
+     * @param baseline baseline
+     * @param width length of decoration in pixels
+     * @param height height of line box
+     * @param deco decoration to be drawn (see Decoration). The enumeration
+     *		constants may be combined.
+     */
+    void drawDecoration(QPainter *p, int x, int y, int baseline, int width, int height, int deco) const;
+
+    /** returns letter spacing
+     */
+    int getLetterSpacing() const { return letterSpacing; }
+    /** returns word spacing
+     */
+    int getWordSpacing() const { return wordSpacing; }
+
+private:
+    mutable FontDef fontDef;
+    mutable QFont f;
+    mutable QFontMetrics fm;
+    mutable QFont *scFont;
+    short letterSpacing;
+    short wordSpacing;
+
+    struct ScalKey;
+    enum   ScalInfo {
+        Unknown,
+        No,
+        Yes
+    };
+
+    static QMap<ScalKey, ScalInfo>* scalCache;
+    static QMap<ScalKey, QValueList<int> >* scalSizesCache;
+    static bool isFontScalable(QFontDatabase& db, const QFont& font);
+};
+
+} // namespace
+
+#endif