third_party/WebKit/Source/core/layout/LayoutTextControlMultiLine.h

   1 /*
   2  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
   3  * Copyright (C) 2009 Apple Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #ifndef LayoutTextControlMultiLine_h
  23 #define LayoutTextControlMultiLine_h
  24
  25 #include "core/layout/LayoutTextControl.h"
  26
  27 namespace blink {
  28
  29 class HTMLTextAreaElement;
  30
  31 class LayoutTextControlMultiLine final : public LayoutTextControl {
  32 public:
  33     LayoutTextControlMultiLine(HTMLTextAreaElement*);
  34     ~LayoutTextControlMultiLine() override;
  35
  36 private:
  37     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectTextArea || LayoutTextControl::isOfType(type); }
  38
  39     bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
  40
  41     float getAvgCharWidth(const AtomicString& family) const override;
  42     LayoutUnit preferredContentLogicalWidth(float charWidth) const override;
  43     LayoutUnit computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const override;
  44     // We override the two baseline functions because we want our baseline to be the bottom of our margin box.
  45     int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
  46     int inlineBlockBaseline(LineDirectionMode) const override { return -1; }
  47
  48     PassRefPtr<ComputedStyle> createInnerEditorStyle(const ComputedStyle& startStyle) const override;
  49     LayoutObject* layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&) override;
  50 };
  51
  52 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTextControlMultiLine, isTextArea());
  53
  54 }
  55
  56 #endif