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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
#define UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
#include <list>
#include <map>
#include <memory>
#include "base/macros.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/message_center/message_center_export.h"
#include "ui/views/view.h"
namespace gfx {
class FontList;
}
namespace message_center {
class InnerBoundedLabel;
namespace test {
class BoundedLabelTest;
}
// BoundedLabels display left aligned text up to a maximum number of lines, with
// ellipsis at the end of the last line for any omitted text. BoundedLabel is a
// direct subclass of views::Views rather than a subclass of views::Label
// to avoid exposing some of views::Label's methods that can't be made to work
// with BoundedLabel. See the description of InnerBoundedLabel in the
// bounded_label.cc file for details.
class MESSAGE_CENTER_EXPORT BoundedLabel : public views::View {
public:
BoundedLabel(const base::string16& text, const gfx::FontList& font_list);
BoundedLabel(const base::string16& text);
~BoundedLabel() override;
void SetColors(SkColor textColor, SkColor backgroundColor);
void SetLineHeight(int height); // Pass in 0 for default height.
void SetLineLimit(int lines); // Pass in -1 for no limit.
void SetText(const base::string16& text); // Additionally clears caches.
int GetLineHeight() const;
int GetLineLimit() const;
// Pass in a -1 width to use the preferred width, a -1 limit to skip limits.
int GetLinesForWidthAndLimit(int width, int limit);
gfx::Size GetSizeForWidthAndLines(int width, int lines);
// views::View:
int GetBaseline() const override;
gfx::Size GetPreferredSize() const override;
int GetHeightForWidth(int width) const override;
void OnPaint(gfx::Canvas* canvas) override;
bool CanProcessEventsWithinSubtree() const override;
void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
protected:
// Overridden from views::View.
void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
private:
friend class test::BoundedLabelTest;
base::string16 GetWrappedTextForTest(int width, int lines);
std::unique_ptr<InnerBoundedLabel> label_;
int line_limit_;
DISALLOW_COPY_AND_ASSIGN(BoundedLabel);
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
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