116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
// Copyright 2016 The Chromium Embedded Framework Authors. Portions copyright
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// 2013 The Chromium Authors. All rights reserved. Use of this source code is
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// governed by a BSD-style license that can be found in the LICENSE file.
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#ifndef CEF_TESTS_CEFCLIENT_BROWSER_OSR_IME_HANDLER_WIN_H_
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#define CEF_TESTS_CEFCLIENT_BROWSER_OSR_IME_HANDLER_WIN_H_
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#pragma once
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#include <windows.h>
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#include <vector>
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#include "include/internal/cef_types_wrappers.h"
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namespace client {
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// Handles IME for the native parent window that hosts an off-screen browser.
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// This object is only accessed on the CEF UI thread.
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class OsrImeHandlerWin {
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public:
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explicit OsrImeHandlerWin(HWND hwnd);
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virtual ~OsrImeHandlerWin();
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// Retrieves whether or not there is an ongoing composition.
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bool is_composing() const { return is_composing_; }
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// Retrieves the input language from Windows and update it.
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void SetInputLanguage();
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// Creates the IME caret windows if required.
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void CreateImeWindow();
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// Destroys the IME caret windows.
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void DestroyImeWindow();
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// Cleans up the all resources attached to the given IMM32Manager object, and
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// reset its composition status.
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void CleanupComposition();
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// Resets the composition status and cancels the ongoing composition.
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void ResetComposition();
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// Retrieves a composition result of the ongoing composition if it exists.
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bool GetResult(LPARAM lparam, CefString& result);
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// Retrieves the current composition status of the ongoing composition.
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// Includes composition text, underline information and selection range in the
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// composition text. IMM32 does not support char selection.
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bool GetComposition(LPARAM lparam,
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CefString& composition_text,
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std::vector<CefCompositionUnderline>& underlines,
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int& composition_start);
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// Enables the IME attached to the given window.
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virtual void EnableIME();
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// Disables the IME attached to the given window.
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virtual void DisableIME();
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// Cancels an ongoing composition of the IME.
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virtual void CancelIME();
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// Updates the IME caret position of the given window.
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void UpdateCaretPosition(uint32_t index);
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// Updates the composition range. |selected_range| is the range of characters
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// that have been selected. |character_bounds| is the bounds of each character
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// in view device coordinates.
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void ChangeCompositionRange(const CefRange& selection_range,
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const std::vector<CefRect>& character_bounds);
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// Updates the position of the IME windows.
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void MoveImeWindow();
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private:
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// Retrieves the composition information.
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void GetCompositionInfo(HIMC imm_context,
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LPARAM lparam,
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CefString& composition_text,
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std::vector<CefCompositionUnderline>& underlines,
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int& composition_start);
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// Retrieves a string from the IMM.
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bool GetString(HIMC imm_context, WPARAM lparam, int type, CefString& result);
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// Represents whether or not there is an ongoing composition.
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bool is_composing_ = false;
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// The current composition character range and its bounds.
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std::vector<CefRect> composition_bounds_;
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// The current input Language ID retrieved from Windows -
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// used for processing language-specific operations in IME.
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LANGID input_language_id_;
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// Represents whether or not the current input context has created a system
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// caret to set the position of its IME candidate window.
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bool system_caret_ = false;
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// The rectangle of the input caret retrieved from a renderer process.
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CefRect ime_rect_;
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// The current cursor index in composition string.
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uint32_t cursor_index_;
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// The composition range in the string. This may be used to determine the
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// offset in composition bounds.
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CefRange composition_range_;
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// Hwnd associated with this instance.
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HWND hwnd_;
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};
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} // namespace client
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#endif // CEF_TESTS_CEFCLIENT_BROWSER_OSR_IME_HANDLER_WIN_H_
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