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/*
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
* (C) 2008 Torch Mobile Inc. All rights reserved.
* (http://www.torchmobile.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.
*
*/
#ifndef LayoutTextControl_h
#define LayoutTextControl_h
#include "core/CoreExport.h"
#include "core/layout/LayoutBlockFlow.h"
#include "core/layout/LayoutFlexibleBox.h"
namespace blink {
class TextControlElement;
class CORE_EXPORT LayoutTextControl : public LayoutBlockFlow {
public:
~LayoutTextControl() override;
TextControlElement* GetTextControlElement() const;
virtual scoped_refptr<ComputedStyle> CreateInnerEditorStyle(
const ComputedStyle& start_style) const = 0;
const char* GetName() const override { return "LayoutTextControl"; }
protected:
LayoutTextControl(TextControlElement*);
// This convenience function should not be made public because
// innerEditorElement may outlive the layout tree.
HTMLElement* InnerEditorElement() const;
int ScrollbarThickness() const;
void AdjustInnerEditorStyle(ComputedStyle& text_block_style) const;
void StyleDidChange(StyleDifference, const ComputedStyle* old_style) override;
void HitInnerEditorElement(HitTestResult&,
const LayoutPoint& point_in_container,
const LayoutPoint& accumulated_offset);
int TextBlockLogicalWidth() const;
int TextBlockLogicalHeight() const;
float ScaleEmToUnits(int x) const;
static bool HasValidAvgCharWidth(const SimpleFontData*,
const AtomicString& family);
virtual float GetAvgCharWidth(const AtomicString& family) const;
virtual LayoutUnit PreferredContentLogicalWidth(float char_width) const = 0;
virtual LayoutUnit ComputeControlLogicalHeight(
LayoutUnit line_height,
LayoutUnit non_content_height) const = 0;
void UpdateFromElement() override;
void ComputeLogicalHeight(LayoutUnit logical_height,
LayoutUnit logical_top,
LogicalExtentComputedValues&) const override;
LayoutObject* LayoutSpecialExcludedChild(bool relayout_children,
SubtreeLayoutScope&) override;
LayoutUnit FirstLineBoxBaseline() const override;
// We need to override this function because we don't want overflow:hidden on
// an <input> to affect the baseline calculation. This is necessary because we
// are an inline-block element as an implementation detail which would
// normally be affected by this.
bool ShouldIgnoreOverflowPropertyForInlineBlockBaseline() const override {
return true;
}
bool IsOfType(LayoutObjectType type) const override {
return type == kLayoutObjectTextControl || LayoutBlockFlow::IsOfType(type);
}
private:
void ComputeIntrinsicLogicalWidths(LayoutUnit& min_logical_width,
LayoutUnit& max_logical_width) const final;
void ComputePreferredLogicalWidths() final;
void RemoveLeftoverAnonymousBlock(LayoutBlock*) final {}
void AddOutlineRects(Vector<LayoutRect>&,
const LayoutPoint& additional_offset,
IncludeBlockVisualOverflowOrNot) const final;
bool CanBeProgramaticallyScrolled() const final { return true; }
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTextControl, IsTextControl());
// LayoutObject for our inner container, for <search> and others.
// We can't use LayoutFlexibleBox directly, because flexboxes have a different
// baseline definition, and then inputs of different types wouldn't line up
// anymore.
class LayoutTextControlInnerContainer final : public LayoutFlexibleBox {
public:
explicit LayoutTextControlInnerContainer(Element* element)
: LayoutFlexibleBox(element) {}
~LayoutTextControlInnerContainer() override = default;
LayoutUnit BaselinePosition(FontBaseline baseline,
bool first_line,
LineDirectionMode direction,
LinePositionMode position) const override {
return LayoutBlock::BaselinePosition(baseline, first_line, direction,
position);
}
LayoutUnit FirstLineBoxBaseline() const override {
return LayoutBlock::FirstLineBoxBaseline();
}
LayoutUnit InlineBlockBaseline(LineDirectionMode direction) const override {
return LayoutBlock::InlineBlockBaseline(direction);
}
bool ShouldIgnoreOverflowPropertyForInlineBlockBaseline() const override {
return true;
}
};
} // namespace blink
#endif // LayoutTextControl_h