Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 138 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/chromium/UniscribeHelperTextRun.cpp b/Source/WebCore/platform/graphics/chromium/UniscribeHelperTextRun.cpp
new file mode 100644
index 0000000..f801c13
--- /dev/null
+++ b/Source/WebCore/platform/graphics/chromium/UniscribeHelperTextRun.cpp
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2006, 2007, 2008, 2009, Google 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:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "UniscribeHelperTextRun.h"
+
+#include "ChromiumBridge.h"
+#include "Font.h"
+#include "SimpleFontData.h"
+
+namespace WebCore {
+
+UniscribeHelperTextRun::UniscribeHelperTextRun(const TextRun& run,
+                                               const Font& font)
+    : UniscribeHelper(run.characters(), run.length(), run.rtl(),
+                      font.primaryFont()->platformData().hfont(),
+                      font.primaryFont()->platformData().scriptCache(),
+                      font.primaryFont()->platformData().scriptFontProperties())
+    , m_font(&font)
+    , m_fontIndex(0)
+{
+    setDirectionalOverride(run.directionalOverride());
+    setLetterSpacing(font.letterSpacing());
+    setSpaceWidth(font.spaceWidth());
+    setWordSpacing(font.wordSpacing());
+    setAscent(font.primaryFont()->ascent());
+
+    init();
+
+    // Padding is the amount to add to make justification happen. This
+    // should be done after Init() so all the runs are already measured.
+    if (run.padding() > 0)
+        justify(run.padding());
+}
+
+UniscribeHelperTextRun::UniscribeHelperTextRun(
+    const wchar_t* input,
+    int inputLength,
+    bool isRtl,
+    HFONT hfont,
+    SCRIPT_CACHE* scriptCache,
+    SCRIPT_FONTPROPERTIES* fontProperties)
+    : UniscribeHelper(input, inputLength, isRtl, hfont,
+                      scriptCache, fontProperties)
+    , m_font(0)
+    , m_fontIndex(-1)
+{
+}
+
+void UniscribeHelperTextRun::tryToPreloadFont(HFONT font)
+{
+    // Ask the browser to get the font metrics for this font.
+    // That will preload the font and it should now be accessible
+    // from the renderer.
+    ChromiumBridge::ensureFontLoaded(font);
+}
+
+bool UniscribeHelperTextRun::nextWinFontData(
+    HFONT* hfont,
+    SCRIPT_CACHE** scriptCache,
+    SCRIPT_FONTPROPERTIES** fontProperties,
+    int* ascent)
+{
+    // This check is necessary because NextWinFontData can be called again
+    // after we already ran out of fonts. fontDataAt behaves in a strange
+    // manner when the difference between param passed and # of fonts stored in
+    // WebKit::Font is larger than one. We can avoid this check by setting
+    // font_index_ to # of elements in hfonts_ when we run out of font. In that
+    // case, we'd have to go through a couple of more checks before returning
+    // false.
+    if (m_fontIndex == -1 || !m_font)
+        return false;
+
+    // If the font data for a fallback font requested is not yet retrieved, add
+    // them to our vectors. Note that '>' rather than '>=' is used to test that
+    // condition. primaryFont is not stored in hfonts_, and friends so that
+    // indices for fontDataAt and our vectors for font data are 1 off from each
+    // other.  That is, when fully populated, hfonts_ and friends have one font
+    // fewer than what's contained in font_.
+    if (static_cast<size_t>(++m_fontIndex) > m_hfonts.size()) {
+        const FontData *fontData = m_font->fontDataAt(m_fontIndex);
+        if (!fontData) {
+            // Ran out of fonts.
+            m_fontIndex = -1;
+            return false;
+        }
+
+        // FIXME: this won't work for SegmentedFontData
+        // http://crbug.com/6425
+        const SimpleFontData* simpleFontData =
+            fontData->fontDataForCharacter(' ');
+
+        m_hfonts.append(simpleFontData->platformData().hfont());
+        m_scriptCaches.append(simpleFontData->platformData().scriptCache());
+        m_fontProperties.append(simpleFontData->platformData().scriptFontProperties());
+        m_ascents.append(simpleFontData->ascent());
+    }
+
+    *hfont = m_hfonts[m_fontIndex - 1];
+    *scriptCache = m_scriptCaches[m_fontIndex - 1];
+    *fontProperties = m_fontProperties[m_fontIndex - 1];
+    *ascent = m_ascents[m_fontIndex - 1];
+    return true;
+}
+
+void UniscribeHelperTextRun::resetFontIndex()
+{
+    m_fontIndex = 0;
+}
+
+}  // namespace WebCore