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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_OMNIBOX_OMNIBOX_TEXT_VIEW_H_
#define CHROME_BROWSER_UI_VIEWS_OMNIBOX_OMNIBOX_TEXT_VIEW_H_
#include <stddef.h>
#include <memory>
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ui/views/omnibox/omnibox_result_view.h"
#include "components/omnibox/browser/autocomplete_match.h"
#include "components/omnibox/browser/suggestion_answer.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/gfx/font_list.h"
#include "ui/views/view.h"
namespace gfx {
class Canvas;
class RenderText;
} // namespace gfx
// A view containing a render text styled via search results. This differs from
// the general purpose views::Label class by having less general features (such
// as selection) and more specific features (such as suggestion answer styling).
class OmniboxTextView : public views::View {
public:
METADATA_HEADER(OmniboxTextView);
explicit OmniboxTextView(OmniboxResultView* result_view);
OmniboxTextView(const OmniboxTextView&) = delete;
OmniboxTextView& operator=(const OmniboxTextView&) = delete;
~OmniboxTextView() override;
// views::View:
gfx::Size CalculatePreferredSize() const override;
bool GetCanProcessEventsWithinSubtree() const override;
int GetHeightForWidth(int width) const override;
void OnPaint(gfx::Canvas* canvas) override;
// Applies given theme color to underlying render text. This is called Apply*
// instead of Set* because the only state kept is in render_text, so call this
// after setting text with methods below.
void ApplyTextColor(ui::ColorId id);
// Returns the render text, or an empty string if there is none.
const std::u16string& GetText() const;
// Sets the render text with default rendering for the given |new_text|. The
// |classifications| are used to style the text. An ImageLine incorporates
// both the text and the styling.
// |deemphasize| specifies whether to use a slightly smaller font than normal.
void SetText(const std::u16string& new_text);
void SetTextWithStyling(const std::u16string& new_text,
const ACMatchClassifications& classifications,
bool deemphasize = false);
void SetTextWithStyling(const SuggestionAnswer::ImageLine& line,
bool deemphasize);
// Adds the "additional" and "status" text from |line|, if any.
void AppendExtraText(const SuggestionAnswer::ImageLine& line);
// Get the height of one line of text. This is handy if the view might have
// multiple lines.
int GetLineHeight() const;
// Reapplies text styling to the results text, based on the types of the match
// parts.
void ReapplyStyling();
// Creates a platform-approriate RenderText, sets its format to that of
// a suggestion and inserts (renders) the provided |text|.
std::unique_ptr<gfx::RenderText> CreateRenderText(
const std::u16string& text) const;
private:
// Adds text from an answer field to the render text using appropriate style.
// A prefix (such as separating space) may also be prepended to field text.
void AppendText(const SuggestionAnswer::TextField& field,
const std::u16string& prefix);
// Updates the cached maximum line height and recomputes the preferred size.
void OnStyleChanged();
// To get color values.
raw_ptr<OmniboxResultView> result_view_;
// Font settings for this view.
int font_height_ = 0;
// Whether to apply deemphasized font instead of primary omnibox font.
// TODO(orinj): Use a more general ChromeTextContext for flexibility, or
// otherwise clean up & unify the different ways of selecting fonts & styles.
bool use_deemphasized_font_ = false;
// Whether to wrap lines if the width is too narrow for the whole string.
bool wrap_text_lines_ = false;
// The primary data for this class.
std::unique_ptr<gfx::RenderText> render_text_;
// The classifications most recently passed to SetText. Used to exit
// early instead of setting text when the text and classifications
// match the current state of the view.
std::unique_ptr<ACMatchClassifications> cached_classifications_;
};
#endif // CHROME_BROWSER_UI_VIEWS_OMNIBOX_OMNIBOX_TEXT_VIEW_H_
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