Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 157 insertions, 0 deletions

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;    
+}
+
+}