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// Copyright 2022 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_ASH_INPUT_METHOD_COMPLETION_SUGGESTION_LABEL_VIEW_H_
#define CHROME_BROWSER_UI_ASH_INPUT_METHOD_COMPLETION_SUGGESTION_LABEL_VIEW_H_
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/chromeos/ui_chromeos_export.h"
#include "ui/views/controls/styled_label.h"
namespace ui {
namespace ime {
// A CompletionSuggestionLabelView renders the text of a completion suggestion.
// A completion suggestion label has two parts:
// - Prefix: The prefix in the suggestion that matches what the user has typed
// so far. This may be empty for next-word predictions.
// - Prediction: The remaining part of the suggestion that is predicted by the
// input method.
//
// Examples:
// - User types "how a". The input method suggests "how are you".
// The prefix is "how a" and the prediction is "re you".
// - User types a space to begin a new word. The input method suggests "how".
// The prefix is "" and the prediction is "how".
//
// CompletionSuggestionLabelView renders the prefix differently from the
// prediction to distinguish the two.
class UI_CHROMEOS_EXPORT CompletionSuggestionLabelView
: public views::StyledLabel {
METADATA_HEADER(CompletionSuggestionLabelView, views::StyledLabel)
public:
// TODO(b/233264555): Allow users of this class to set the font instead of
// hardcoding it.
static const char kFontName[];
static const int kFontSize = 13;
CompletionSuggestionLabelView();
// Set the prefix and prediction parts of the label.
void SetPrefixAndPrediction(const std::u16string& prefix,
const std::u16string& prediction);
// Get the width in pixels of the prefix part of the label.
int GetPrefixWidthPx() const;
};
BEGIN_VIEW_BUILDER(UI_CHROMEOS_EXPORT,
CompletionSuggestionLabelView,
views::StyledLabel)
END_VIEW_BUILDER
} // namespace ime
} // namespace ui
DEFINE_VIEW_BUILDER(UI_CHROMEOS_EXPORT, ui::ime::CompletionSuggestionLabelView)
#endif // CHROME_BROWSER_UI_ASH_INPUT_METHOD_COMPLETION_SUGGESTION_LABEL_VIEW_H_
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