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Unified Diff: Source/core/accessibility/AccessibilityInlineTextBox.cpp

Issue 23983002: Expose InlineTextBoxes in the accessibility tree. (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Address feedback Created 7 years, 2 months ago
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Index: Source/core/accessibility/AccessibilityInlineTextBox.cpp
diff --git a/Source/core/accessibility/AccessibilityInlineTextBox.cpp b/Source/core/accessibility/AccessibilityInlineTextBox.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2375d04fab83f70c63bfd4b6be1538fd34ce0ed9
--- /dev/null
+++ b/Source/core/accessibility/AccessibilityInlineTextBox.cpp
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2013, 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:
+ *
+ * 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 "core/accessibility/AccessibilityInlineTextBox.h"
+
+#include "core/accessibility/AXObjectCache.h"
+#include "core/dom/Range.h"
+#include "core/rendering/RenderText.h"
+#include "platform/LayoutUnit.h"
+
+using namespace std;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+AccessibilityInlineTextBox::AccessibilityInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
+ : m_inlineTextBox(inlineTextBox)
+{
+ RenderText* renderText = m_inlineTextBox->renderText();
+ m_axObjectCache = renderText->document().axObjectCache();
+}
+
+AccessibilityInlineTextBox::~AccessibilityInlineTextBox()
+{
+ if (m_axObjectCache && m_inlineTextBox)
+ m_axObjectCache->remove(m_inlineTextBox.get());
+}
+
+PassRefPtr<AccessibilityInlineTextBox> AccessibilityInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
+{
+ return adoptRef(new AccessibilityInlineTextBox(inlineTextBox));
+}
+
+void AccessibilityInlineTextBox::init()
+{
+}
+
+void AccessibilityInlineTextBox::detach()
+{
+ m_inlineTextBox = 0;
+ m_axObjectCache = 0;
+ AccessibilityObject::detach();
+}
+
+LayoutRect AccessibilityInlineTextBox::elementRect() const
+{
+ if (!m_inlineTextBox)
+ return LayoutRect();
+
+ return m_inlineTextBox->bounds();
+}
+
+bool AccessibilityInlineTextBox::computeAccessibilityIsIgnored() const
+{
+ if (AccessibilityObject* parent = parentObject())
+ return parent->accessibilityIsIgnored();
+
+ return false;
+}
+
+void AccessibilityInlineTextBox::textCharacterOffsets(Vector<int>& offsets) const
+{
+ if (!m_inlineTextBox)
+ return;
+
+ unsigned len = m_inlineTextBox->len();
+ Vector<float> widths;
+ m_inlineTextBox->characterWidths(widths);
+ ASSERT(widths.size() == len);
+ offsets.resize(len);
+
+ float widthSoFar = 0;
+ for (unsigned i = 0; i < len; i++) {
+ widthSoFar += widths[i];
+ offsets[i] = LayoutUnit::fromFloatRound(widthSoFar);
aboxhall 2013/10/17 22:27:55 So offsets[i] is the position of the end of charac
dmazzoni 2013/10/19 06:48:07 Yes. It's arbitrary, it could be the beginning, I
+ }
+}
+
+void AccessibilityInlineTextBox::wordBoundaries(Vector<PlainTextRange>& words) const
+{
+ if (!m_inlineTextBox)
+ return;
+
+ Vector<AbstractInlineTextBox::WordBoundaries> wordBoundaries;
+ m_inlineTextBox->wordBoundaries(wordBoundaries);
+ words.resize(wordBoundaries.size());
+ for (unsigned i = 0; i < wordBoundaries.size(); i++)
+ words[i] = PlainTextRange(wordBoundaries[i].startIndex, wordBoundaries[i].endIndex - wordBoundaries[i].startIndex);
+}
+
+String AccessibilityInlineTextBox::stringValue() const
+{
+ if (!m_inlineTextBox)
+ return String();
+
+ return m_inlineTextBox->text();
+}
+
+AccessibilityObject* AccessibilityInlineTextBox::parentObject() const
+{
+ if (!m_inlineTextBox || !m_axObjectCache)
+ return 0;
+
+ RenderText* renderText = m_inlineTextBox->renderText();
+ return m_axObjectCache->getOrCreate(renderText);
+}
+
+AccessibilityTextDirection AccessibilityInlineTextBox::textDirection() const
+{
+ if (!m_inlineTextBox)
+ return AccessibilityTextDirectionLeftToRight;
+
+ switch (m_inlineTextBox->direction()) {
+ case AbstractInlineTextBox::LeftToRight:
+ return AccessibilityTextDirectionLeftToRight;
+ case AbstractInlineTextBox::RightToLeft:
+ return AccessibilityTextDirectionRightToLeft;
+ case AbstractInlineTextBox::TopToBottom:
+ return AccessibilityTextDirectionTopToBottom;
+ case AbstractInlineTextBox::BottomToTop:
+ return AccessibilityTextDirectionBottomToTop;
+ }
+
+ return AccessibilityTextDirectionLeftToRight;
+}
+
+} // namespace WebCore

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