Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

6 files changed, 756 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/pango/FontCachePango.cpp b/Source/WebCore/platform/graphics/pango/FontCachePango.cpp
new file mode 100644
index 0000000..fad29e0
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/FontCachePango.cpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2008 Alp Toker <alp@atoker.com>
+ *
+ * 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.
+ *
+ */
+
+#include "config.h"
+#include "FontCache.h"
+
+#include "CString.h"
+#include "Font.h"
+#include "OwnPtrCairo.h"
+#include "SimpleFontData.h"
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+void FontCache::platformInit()
+{
+    if (!FontPlatformData::init())
+        ASSERT_NOT_REACHED();
+}
+
+const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
+{
+    return 0;
+}
+
+SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
+{
+    return 0;
+}
+
+SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
+{
+    // FIXME: Would be even better to somehow get the user's default font here.
+    // For now we'll pick the default that the user would get without changing any prefs.
+    static AtomicString timesStr("Times New Roman");
+    return getCachedFontData(fontDescription, timesStr);
+}
+
+void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
+{
+}
+
+FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
+{
+    return new FontPlatformData(fontDescription, family);
+}
+
+}
diff --git a/Source/WebCore/platform/graphics/pango/FontCustomPlatformDataPango.cpp b/Source/WebCore/platform/graphics/pango/FontCustomPlatformDataPango.cpp
new file mode 100644
index 0000000..a158689
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/FontCustomPlatformDataPango.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2008 Alp Toker <alp@atoker.com>
+ *
+ * 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.
+ *
+ */
+
+#include "config.h"
+#include "FontCustomPlatformData.h"
+
+#include "SharedBuffer.h"
+#include "FontPlatformData.h"
+
+namespace WebCore {
+
+FontCustomPlatformData::~FontCustomPlatformData()
+{
+}
+
+FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation, FontRenderingMode)
+{
+    return FontPlatformData(m_fontFace, size, bold, italic);
+}
+
+static void releaseData(void* data)
+{
+    static_cast<SharedBuffer*>(data)->deref();
+}
+
+FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
+{
+    // FIXME: we need support in pango to read fonts from memory to implement this.y
+    return 0;
+}
+
+bool FontCustomPlatformData::supportsFormat(const String& /* format */)
+{
+    return false;
+}
+
+}
diff --git a/Source/WebCore/platform/graphics/pango/FontPlatformData.h b/Source/WebCore/platform/graphics/pango/FontPlatformData.h
new file mode 100644
index 0000000..2929a3f
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/FontPlatformData.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc.
+ * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
+ * Copyright (C) 2007 Holger Hans Peter Freyther
+ * Copyright (C) 2007 Pioneer Research Center USA, Inc.
+ * All rights reserved.
+ *
+ * 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 FontPlatformDataPango_h
+#define FontPlatformDataPango_h
+
+#include "FontDescription.h"
+#include "FontOrientation.h"
+#include "GlyphBuffer.h"
+#include <cairo.h>
+#include <pango/pangocairo.h>
+#include <wtf/Forward.h>
+
+namespace WebCore {
+
+class FontPlatformData {
+public:
+    FontPlatformData(WTF::HashTableDeletedValueType)
+        : m_context(0)
+        , m_font(hashTableDeletedFontValue())
+        , m_size(0)
+        , m_syntheticBold(false)
+        , m_syntheticOblique(false)
+        , m_scaledFont(0)
+        { }
+
+    FontPlatformData()
+        : m_context(0)
+        , m_font(0)
+        , m_size(0)
+        , m_syntheticBold(false)
+        , m_syntheticOblique(false)
+        , m_scaledFont(0)
+        { }
+
+    FontPlatformData(const FontDescription&, const AtomicString& family);
+    FontPlatformData(cairo_font_face_t* fontFace, float size, bool bold, bool italic);
+    FontPlatformData(float size, bool bold, bool italic);
+    FontPlatformData(const FontPlatformData&);
+    ~FontPlatformData();
+
+    static bool init();
+    bool isFixedPitch();
+    float size() const { return m_size; }
+    void setSize(float size) { m_size = size; }
+    bool syntheticBold() const { return m_syntheticBold; }
+    bool syntheticOblique() const { return m_syntheticOblique; }
+
+    FontOrientation orientation() const { return Horizontal; } // FIXME: Implement.
+
+    cairo_scaled_font_t* scaledFont() const { return m_scaledFont; }
+
+    unsigned hash() const
+    {
+        uintptr_t hashCodes[1] = { reinterpret_cast<uintptr_t>(m_scaledFont) };
+        return WTF::StringHasher::createBlobHash<sizeof(hashCodes)>(hashCodes);
+    }
+
+    bool operator==(const FontPlatformData&) const;
+    FontPlatformData& operator=(const FontPlatformData&);
+    bool isHashTableDeletedValue() const
+    {
+        return m_font == hashTableDeletedFontValue();
+    }
+
+#ifndef NDEBUG
+    String description() const;
+#endif
+
+    static PangoFontMap* m_fontMap;
+    static GHashTable* m_hashTable;
+    PangoContext* m_context;
+    PangoFont* m_font;
+    float m_size;
+    bool m_syntheticBold;
+    bool m_syntheticOblique;
+    cairo_scaled_font_t* m_scaledFont;
+private:
+    static PangoFont *hashTableDeletedFontValue() { return reinterpret_cast<PangoFont*>(-1); }
+};
+
+}
+
+#endif // FontPlatformDataPango_h
diff --git a/Source/WebCore/platform/graphics/pango/FontPlatformDataPango.cpp b/Source/WebCore/platform/graphics/pango/FontPlatformDataPango.cpp
new file mode 100644
index 0000000..03dc33d
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/FontPlatformDataPango.cpp
@@ -0,0 +1,277 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.
+ * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
+ * Copyright (C) 2007, 2008 Alp Toker <alp@atoker.com>
+ * Copyright (C) 2007 Holger Hans Peter Freyther
+ * Copyright (C) 2007 Pioneer Research Center USA, Inc.
+ * Copyright (C) 2009 Igalia S.L.
+ * All rights reserved.
+ *
+ * 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.
+ */
+#include "config.h"
+#include "FontPlatformData.h"
+
+#include "PlatformString.h"
+#include "FontDescription.h"
+#include <wtf/text/CString.h>
+#include <cairo.h>
+#include <assert.h>
+
+#include <pango/pango.h>
+#include <pango/pangocairo.h>
+
+// Use cairo-ft i a recent enough Pango version isn't available
+#if !PANGO_VERSION_CHECK(1,18,0)
+#include <cairo-ft.h>
+#include <pango/pangofc-fontmap.h>
+#endif
+
+namespace WebCore {
+
+PangoFontMap* FontPlatformData::m_fontMap = 0;
+GHashTable* FontPlatformData::m_hashTable = 0;
+
+FontPlatformData::FontPlatformData(const FontDescription& fontDescription, const AtomicString& familyName)
+    : m_context(0)
+    , m_font(0)
+    , m_size(fontDescription.computedSize())
+    , m_syntheticBold(false)
+    , m_syntheticOblique(false)
+    , m_scaledFont(0)
+{
+    FontPlatformData::init();
+
+    CString stored_family = familyName.string().utf8();
+    char const* families[] = {
+      stored_family.data(),
+      NULL
+    };
+
+    switch (fontDescription.genericFamily()) {
+    case FontDescription::SerifFamily:
+        families[1] = "serif";
+        break;
+    case FontDescription::SansSerifFamily:
+        families[1] = "sans";
+        break;
+    case FontDescription::MonospaceFamily:
+        families[1] = "monospace";
+        break;
+    case FontDescription::NoFamily:
+    case FontDescription::StandardFamily:
+    default:
+        families[1] = "sans";
+        break;
+    }
+
+    PangoFontDescription* description = pango_font_description_new();
+    pango_font_description_set_absolute_size(description, fontDescription.computedSize() * PANGO_SCALE);
+
+    // FIXME: Map all FontWeight values to Pango font weights.
+    if (fontDescription.weight() >= FontWeight600)
+        pango_font_description_set_weight(description, PANGO_WEIGHT_BOLD);
+    if (fontDescription.italic())
+        pango_font_description_set_style(description, PANGO_STYLE_ITALIC);
+
+#if PANGO_VERSION_CHECK(1,21,5)   // deprecated in 1.21
+    m_context = pango_font_map_create_context(m_fontMap);
+#else
+    m_context = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(m_fontMap));
+#endif
+    for (unsigned int i = 0; !m_font && i < G_N_ELEMENTS(families); i++) {
+        pango_font_description_set_family(description, families[i]);
+        pango_context_set_font_description(m_context, description);
+        m_font = pango_font_map_load_font(m_fontMap, m_context, description);
+    }
+
+#if PANGO_VERSION_CHECK(1,18,0)
+    if (m_font)
+        m_scaledFont = cairo_scaled_font_reference(pango_cairo_font_get_scaled_font(PANGO_CAIRO_FONT(m_font)));
+#else
+    // This compatibility code for older versions of Pango is not well-tested.
+    if (m_font) {
+        PangoFcFont* fcfont = PANGO_FC_FONT(m_font);
+        cairo_font_face_t* face = cairo_ft_font_face_create_for_pattern(fcfont->font_pattern);
+        double size;
+        if (FcPatternGetDouble(fcfont->font_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
+            size = 12.0;
+        cairo_matrix_t fontMatrix;
+        cairo_matrix_init_scale(&fontMatrix, size, size);
+        cairo_font_options_t* fontOptions;
+        if (pango_cairo_context_get_font_options(m_context))
+            fontOptions = cairo_font_options_copy(pango_cairo_context_get_font_options(m_context));
+        else
+            fontOptions = cairo_font_options_create();
+        cairo_matrix_t ctm;
+        cairo_matrix_init_identity(&ctm);
+        m_scaledFont = cairo_scaled_font_create(face, &fontMatrix, &ctm, fontOptions);
+        cairo_font_options_destroy(fontOptions);
+        cairo_font_face_destroy(face);
+    }
+#endif
+    pango_font_description_free(description);
+}
+
+FontPlatformData::FontPlatformData(float size, bool bold, bool italic)
+    : m_context(0)
+    , m_font(0)
+    , m_size(size)
+    , m_syntheticBold(bold)
+    , m_syntheticOblique(italic)
+    , m_scaledFont(0)
+{
+}
+
+FontPlatformData::FontPlatformData(cairo_font_face_t* fontFace, float size, bool bold, bool italic)
+    : m_context(0)
+    , m_font(0)
+    , m_size(size)
+    , m_syntheticBold(bold)
+    , m_syntheticOblique(italic)
+    , m_scaledFont(0)
+{
+    cairo_matrix_t fontMatrix;
+    cairo_matrix_init_scale(&fontMatrix, size, size);
+    cairo_matrix_t ctm;
+    cairo_matrix_init_identity(&ctm);
+    cairo_font_options_t* options = cairo_font_options_create();
+
+    // We force antialiasing and disable hinting to provide consistent
+    // typographic qualities for custom fonts on all platforms.
+    cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_NONE);
+    cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
+
+    m_scaledFont = cairo_scaled_font_create(fontFace, &fontMatrix, &ctm, options);
+    cairo_font_options_destroy(options);
+}
+
+bool FontPlatformData::init()
+{
+    static bool initialized = false;
+    if (initialized)
+        return true;
+    initialized = true;
+
+    if (!m_fontMap)
+        m_fontMap = pango_cairo_font_map_get_default();
+    if (!m_hashTable) {
+        PangoFontFamily** families = 0;
+        int n_families = 0;
+
+        m_hashTable = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_object_unref);
+
+        pango_font_map_list_families(m_fontMap, &families, &n_families);
+
+        for (int family = 0; family < n_families; family++)
+                g_hash_table_insert(m_hashTable,
+                                    g_strdup(pango_font_family_get_name(families[family])),
+                                    g_object_ref(families[family]));
+
+        g_free(families);
+    }
+
+    return true;
+}
+
+FontPlatformData::~FontPlatformData()
+{
+    if (m_font && m_font != reinterpret_cast<PangoFont*>(-1)) {
+        g_object_unref(m_font);
+        m_font = 0;
+    }
+
+    if (m_context) {
+        g_object_unref(m_context);
+        m_context = 0;
+    }
+
+    if (m_scaledFont) {
+        cairo_scaled_font_destroy(m_scaledFont);
+        m_scaledFont = 0;
+    }
+}
+
+bool FontPlatformData::isFixedPitch()
+{
+    PangoFontDescription* description = pango_font_describe_with_absolute_size(m_font);
+    PangoFontFamily* family = reinterpret_cast<PangoFontFamily*>(g_hash_table_lookup(m_hashTable, pango_font_description_get_family(description)));
+    pango_font_description_free(description);
+    return pango_font_family_is_monospace(family);
+}
+
+FontPlatformData& FontPlatformData::operator=(const FontPlatformData& other)
+{
+    // Check for self-assignment.
+    if (this == &other)
+        return *this;
+
+    m_size = other.m_size;
+    m_syntheticBold = other.m_syntheticBold;
+    m_syntheticOblique = other.m_syntheticOblique;
+
+    if (other.m_scaledFont)
+        cairo_scaled_font_reference(other.m_scaledFont);
+    if (m_scaledFont)
+        cairo_scaled_font_destroy(m_scaledFont);
+    m_scaledFont = other.m_scaledFont;
+
+    if (other.m_font)
+        g_object_ref(other.m_font);
+    if (m_font)
+        g_object_unref(m_font);
+    m_font = other.m_font;
+
+    if (other.m_context)
+        g_object_ref(other.m_context);
+    if (m_context)
+        g_object_unref(m_context);
+    m_context = other.m_context;
+
+    return *this;
+}
+
+FontPlatformData::FontPlatformData(const FontPlatformData& other)
+    : m_context(0)
+    , m_font(0)
+    , m_scaledFont(0)
+{
+    *this = other;
+}
+
+bool FontPlatformData::operator==(const FontPlatformData& other) const
+{
+    if (m_font == other.m_font)
+        return true;
+    if (m_font == 0 || m_font == reinterpret_cast<PangoFont*>(-1)
+        || other.m_font == 0 || other.m_font == reinterpret_cast<PangoFont*>(-1))
+        return false;
+    PangoFontDescription* thisDesc = pango_font_describe(m_font);
+    PangoFontDescription* otherDesc = pango_font_describe(other.m_font);
+    bool result = pango_font_description_equal(thisDesc, otherDesc);
+    pango_font_description_free(otherDesc);
+    pango_font_description_free(thisDesc);
+    return result;
+}
+
+#ifndef NDEBUG
+String FontPlatformData::description() const
+{
+    return String();
+}
+#endif
+
+}
diff --git a/Source/WebCore/platform/graphics/pango/GlyphPageTreeNodePango.cpp b/Source/WebCore/platform/graphics/pango/GlyphPageTreeNodePango.cpp
new file mode 100644
index 0000000..8d0baa6
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/GlyphPageTreeNodePango.cpp
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
+ * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
+ * Copyright (C) 2007 Pioneer Research Center USA, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "GlyphPageTreeNode.h"
+
+#include "SimpleFontData.h"
+#include <pango/pango-font.h>
+
+namespace WebCore {
+
+static PangoGlyph pango_font_get_glyph(PangoFont* font, PangoContext* context, gunichar wc)
+{
+    PangoGlyph result = 0;
+    gchar buffer[7];
+
+    gint  length = g_unichar_to_utf8(wc, buffer);
+    g_return_val_if_fail(length, 0);
+
+    GList* items = pango_itemize(context, buffer, 0, length, NULL, NULL);
+
+    if (g_list_length(items) == 1) {
+        PangoItem* item = reinterpret_cast<PangoItem*>(items->data);
+        PangoFont* tmpFont = item->analysis.font;
+        item->analysis.font = font;
+
+        PangoGlyphString* glyphs = pango_glyph_string_new();
+        pango_shape(buffer, length, &item->analysis, glyphs);
+
+        item->analysis.font = tmpFont;
+
+        if (glyphs->num_glyphs == 1)
+            result = glyphs->glyphs[0].glyph;
+        else
+            g_warning("didn't get 1 glyph but %d", glyphs->num_glyphs);
+
+        pango_glyph_string_free(glyphs);
+    }
+
+    g_list_foreach(items, (GFunc)pango_item_free, NULL);
+    g_list_free(items);
+
+    return result;
+}
+
+bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
+{
+    // The bufferLength will be greater than the glyph page size if the buffer has Unicode supplementary characters.
+    // We won't support this for now.
+    if (bufferLength > GlyphPage::size)
+        return false;
+
+    if (!fontData->platformData().m_font || fontData->platformData().m_font == reinterpret_cast<PangoFont*>(-1))
+        return false;
+
+    bool haveGlyphs = false;
+    for (unsigned i = 0; i < length; i++) {
+        Glyph glyph = pango_font_get_glyph(fontData->platformData().m_font, fontData->platformData().m_context, buffer[i]);
+        if (!glyph)
+            setGlyphDataForIndex(offset + i, 0, 0);
+        else {
+            setGlyphDataForIndex(offset + i, glyph, fontData);
+            haveGlyphs = true;
+        }
+    }
+
+    return haveGlyphs;
+}
+
+}
diff --git a/Source/WebCore/platform/graphics/pango/SimpleFontDataPango.cpp b/Source/WebCore/platform/graphics/pango/SimpleFontDataPango.cpp
new file mode 100644
index 0000000..d0bf836
--- /dev/null
+++ b/Source/WebCore/platform/graphics/pango/SimpleFontDataPango.cpp
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
+ * Copyright (C) 2007, 2008 Alp Toker <alp@atoker.com>
+ * Copyright (C) 2007 Holger Hans Peter Freyther
+ * Copyright (C) 2007 Pioneer Research Center USA, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "SimpleFontData.h"
+
+#include "FloatRect.h"
+#include "Font.h"
+#include "FontCache.h"
+#include "FontDescription.h"
+#include "GlyphBuffer.h"
+#include <cairo.h>
+#include <wtf/MathExtras.h>
+
+namespace WebCore {
+
+void SimpleFontData::platformInit()
+{
+    cairo_font_extents_t font_extents;
+    cairo_text_extents_t text_extents;
+    cairo_scaled_font_extents(m_platformData.m_scaledFont, &font_extents);
+    m_ascent = static_cast<int>(lroundf(font_extents.ascent));
+    m_descent = static_cast<int>(lroundf(font_extents.descent));
+    m_lineSpacing = static_cast<int>(lroundf(font_extents.height));
+    // There seems to be some rounding error in cairo (or in how we
+    // use cairo) with some fonts, like DejaVu Sans Mono, which makes
+    // cairo report a height smaller than ascent + descent, which is
+    // wrong and confuses WebCore's layout system. Workaround this
+    // while we figure out what's going on.
+    if (m_lineSpacing < m_ascent + m_descent)
+        m_lineSpacing = m_ascent + m_descent;
+    cairo_scaled_font_text_extents(m_platformData.m_scaledFont, "x", &text_extents);
+    m_xHeight = text_extents.height;
+    cairo_scaled_font_text_extents(m_platformData.m_scaledFont, " ", &text_extents);
+    m_spaceWidth =  static_cast<float>(text_extents.x_advance);
+    m_lineGap = m_lineSpacing - m_ascent - m_descent;
+    m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
+}
+
+void SimpleFontData::platformCharWidthInit()
+{
+    m_avgCharWidth = 0.f;
+    m_maxCharWidth = 0.f;
+    initCharWidths();
+}
+
+void SimpleFontData::platformDestroy()
+{
+}
+
+SimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const
+{
+    FontDescription desc = FontDescription(fontDescription);
+    desc.setSpecifiedSize(scaleFactor * fontDescription.computedSize());
+    FontPlatformData platformData(desc, desc.family().family());
+    return new SimpleFontData(platformData);
+}
+
+SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
+{
+    if (!m_derivedFontData)
+        m_derivedFontData = DerivedFontData::create(isCustomFont());
+    if (!m_derivedFontData->smallCaps)
+        m_derivedFontData->smallCaps = scaledFontData(fontDescription, .7);
+
+    return m_derivedFontData->smallCaps.get();
+}
+
+SimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const
+{
+    if (!m_derivedFontData)
+        m_derivedFontData = DerivedFontData::create(isCustomFont());
+    if (!m_derivedFontData->emphasisMark)
+        m_derivedFontData->emphasisMark = scaledFontData(fontDescription, .5);
+
+    return m_derivedFontData->emphasisMark.get();
+}
+
+bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
+{
+    bool result = true;
+
+    PangoCoverage* coverage = pango_font_get_coverage(m_platformData.m_font, pango_language_get_default());
+
+    for (int i = 0; i < length; i++) {
+        if (PANGO_COVERAGE_NONE == pango_coverage_get(coverage, characters[i])) {
+            result = false;
+            break;
+        }
+    }
+
+    pango_coverage_unref(coverage);
+
+    return result;
+}
+
+void SimpleFontData::determinePitch()
+{
+    if (isCustomFont()) {
+        m_treatAsFixedPitch = false;
+        return;
+    }
+
+    m_treatAsFixedPitch = m_platformData.isFixedPitch();
+}
+
+FloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const
+{
+    return FloatRect();
+}
+
+float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
+{
+    ASSERT(m_platformData.m_scaledFont);
+
+    cairo_glyph_t cglyph = { glyph, 0, 0 };
+    cairo_text_extents_t extents;
+    cairo_scaled_font_glyph_extents(m_platformData.m_scaledFont, &cglyph, 1, &extents);
+
+    float width = (float)m_spaceWidth;
+    if (cairo_scaled_font_status(m_platformData.m_scaledFont) == CAIRO_STATUS_SUCCESS && extents.x_advance != 0)
+        width = (float)extents.x_advance;
+
+    return width;    
+}
+
+}