зеркало из https://github.com/mozilla/gecko-dev.git
739 строки
21 KiB
C++
739 строки
21 KiB
C++
/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_widget_IMEData_h_
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#define mozilla_widget_IMEData_h_
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#include "nsPoint.h"
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#include "nsRect.h"
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#include "nsStringGlue.h"
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namespace mozilla {
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class WritingMode;
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} // namespace mozilla
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/**
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* Preference for receiving IME updates
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*
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* If mWantUpdates is not NOTIFY_NOTHING, nsTextStateManager will observe text
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* change and/or selection change and call nsIWidget::NotifyIME() with
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* NOTIFY_IME_OF_SELECTION_CHANGE and/or NOTIFY_IME_OF_TEXT_CHANGE.
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* Please note that the text change observing cost is very expensive especially
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* on an HTML editor has focus.
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* If the IME implementation on a particular platform doesn't care about
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* NOTIFY_IME_OF_SELECTION_CHANGE and/or NOTIFY_IME_OF_TEXT_CHANGE,
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* they should set mWantUpdates to NOTIFY_NOTHING to avoid the cost.
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* If the IME implementation needs notifications even while our process is
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* deactive, it should also set NOTIFY_DURING_DEACTIVE.
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*/
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struct nsIMEUpdatePreference final
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{
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typedef uint8_t Notifications;
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enum : Notifications
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{
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NOTIFY_NOTHING = 0,
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NOTIFY_SELECTION_CHANGE = 1 << 0,
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NOTIFY_TEXT_CHANGE = 1 << 1,
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NOTIFY_POSITION_CHANGE = 1 << 2,
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// NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR is used when mouse button is pressed
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// or released on a character in the focused editor. The notification is
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// notified to IME as a mouse event. If it's consumed by IME, NotifyIME()
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// returns NS_SUCCESS_EVENT_CONSUMED. Otherwise, it returns NS_OK if it's
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// handled without any error.
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NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR = 1 << 3,
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// Following values indicate when widget needs or doesn't need notification.
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NOTIFY_CHANGES_CAUSED_BY_COMPOSITION = 1 << 6,
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// NOTE: NOTIFY_DURING_DEACTIVE isn't supported in environments where two
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// or more compositions are possible. E.g., Mac and Linux (GTK).
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NOTIFY_DURING_DEACTIVE = 1 << 7,
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// Changes are notified in following conditions if the instance is
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// just constructed. If some platforms don't need change notifications
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// in some of following conditions, the platform should remove following
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// flags before returing the instance from nsIWidget::GetUpdatePreference().
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DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES =
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NOTIFY_CHANGES_CAUSED_BY_COMPOSITION
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};
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nsIMEUpdatePreference()
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: mWantUpdates(DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES)
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{
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}
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explicit nsIMEUpdatePreference(Notifications aWantUpdates)
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: mWantUpdates(aWantUpdates | DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES)
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{
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}
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void DontNotifyChangesCausedByComposition()
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{
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mWantUpdates &= ~DEFAULT_CONDITIONS_OF_NOTIFYING_CHANGES;
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}
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bool WantSelectionChange() const
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{
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return !!(mWantUpdates & NOTIFY_SELECTION_CHANGE);
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}
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bool WantTextChange() const
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{
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return !!(mWantUpdates & NOTIFY_TEXT_CHANGE);
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}
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bool WantPositionChanged() const
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{
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return !!(mWantUpdates & NOTIFY_POSITION_CHANGE);
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}
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bool WantChanges() const
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{
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return WantSelectionChange() || WantTextChange();
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}
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bool WantMouseButtonEventOnChar() const
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{
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return !!(mWantUpdates & NOTIFY_MOUSE_BUTTON_EVENT_ON_CHAR);
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}
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bool WantChangesCausedByComposition() const
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{
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return WantChanges() &&
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!!(mWantUpdates & NOTIFY_CHANGES_CAUSED_BY_COMPOSITION);
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}
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bool WantDuringDeactive() const
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{
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return !!(mWantUpdates & NOTIFY_DURING_DEACTIVE);
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}
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Notifications mWantUpdates;
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};
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/**
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* Contains IMEStatus plus information about the current
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* input context that the IME can use as hints if desired.
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*/
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namespace mozilla {
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namespace widget {
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struct IMEState final
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{
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/**
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* IME enabled states, the mEnabled value of
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* SetInputContext()/GetInputContext() should be one value of following
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* values.
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*
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* WARNING: If you change these values, you also need to edit:
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* nsIDOMWindowUtils.idl
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* nsContentUtils::GetWidgetStatusFromIMEStatus
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*/
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enum Enabled
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{
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/**
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* 'Disabled' means the user cannot use IME. So, the IME open state should
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* be 'closed' during 'disabled'.
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*/
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DISABLED,
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/**
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* 'Enabled' means the user can use IME.
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*/
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ENABLED,
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/**
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* 'Password' state is a special case for the password editors.
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* E.g., on mac, the password editors should disable the non-Roman
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* keyboard layouts at getting focus. Thus, the password editor may have
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* special rules on some platforms.
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*/
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PASSWORD,
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/**
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* This state is used when a plugin is focused.
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* When a plug-in is focused content, we should send native events
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* directly. Because we don't process some native events, but they may
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* be needed by the plug-in.
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*/
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PLUGIN
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};
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Enabled mEnabled;
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/**
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* IME open states the mOpen value of SetInputContext() should be one value of
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* OPEN, CLOSE or DONT_CHANGE_OPEN_STATE. GetInputContext() should return
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* OPEN, CLOSE or OPEN_STATE_NOT_SUPPORTED.
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*/
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enum Open
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{
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/**
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* 'Unsupported' means the platform cannot return actual IME open state.
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* This value is used only by GetInputContext().
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*/
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OPEN_STATE_NOT_SUPPORTED,
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/**
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* 'Don't change' means the widget shouldn't change IME open state when
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* SetInputContext() is called.
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*/
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DONT_CHANGE_OPEN_STATE = OPEN_STATE_NOT_SUPPORTED,
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/**
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* 'Open' means that IME should compose in its primary language (or latest
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* input mode except direct ASCII character input mode). Even if IME is
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* opened by this value, users should be able to close IME by theirselves.
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* Web contents can specify this value by |ime-mode: active;|.
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*/
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OPEN,
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/**
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* 'Closed' means that IME shouldn't handle key events (or should handle
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* as ASCII character inputs on mobile device). Even if IME is closed by
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* this value, users should be able to open IME by theirselves.
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* Web contents can specify this value by |ime-mode: inactive;|.
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*/
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CLOSED
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};
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Open mOpen;
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IMEState()
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: mEnabled(ENABLED)
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, mOpen(DONT_CHANGE_OPEN_STATE)
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{
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}
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explicit IMEState(Enabled aEnabled, Open aOpen = DONT_CHANGE_OPEN_STATE)
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: mEnabled(aEnabled)
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, mOpen(aOpen)
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{
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}
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// Returns true if the user can input characters.
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// This means that a plain text editor, an HTML editor, a password editor or
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// a plain text editor whose ime-mode is "disabled".
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bool IsEditable() const
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{
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return mEnabled == ENABLED || mEnabled == PASSWORD;
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}
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// Returns true if the user might be able to input characters.
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// This means that a plain text editor, an HTML editor, a password editor,
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// a plain text editor whose ime-mode is "disabled" or a windowless plugin
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// has focus.
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bool MaybeEditable() const
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{
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return IsEditable() || mEnabled == PLUGIN;
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}
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};
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struct InputContext final
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{
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InputContext()
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: mNativeIMEContext(nullptr)
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, mOrigin(XRE_IsParentProcess() ? ORIGIN_MAIN : ORIGIN_CONTENT)
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, mMayBeIMEUnaware(false)
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{
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}
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bool IsPasswordEditor() const
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{
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return mHTMLInputType.LowerCaseEqualsLiteral("password");
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}
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IMEState mIMEState;
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/* The type of the input if the input is a html input field */
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nsString mHTMLInputType;
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/* The type of the inputmode */
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nsString mHTMLInputInputmode;
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/* A hint for the action that is performed when the input is submitted */
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nsString mActionHint;
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/* Native IME context for the widget. This doesn't come from the argument of
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SetInputContext(). If there is only one context in the process, this may
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be nullptr. */
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void* mNativeIMEContext;
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/**
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* mOrigin indicates whether this focus event refers to main or remote
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* content.
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*/
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enum Origin
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{
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// Adjusting focus of content on the main process
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ORIGIN_MAIN,
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// Adjusting focus of content in a remote process
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ORIGIN_CONTENT
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};
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Origin mOrigin;
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/* True if the webapp may be unaware of IME events such as input event or
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* composiion events. This enables a key-events-only mode on Android for
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* compatibility with webapps relying on key listeners. */
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bool mMayBeIMEUnaware;
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bool IsOriginMainProcess() const
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{
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return mOrigin == ORIGIN_MAIN;
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}
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bool IsOriginContentProcess() const
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{
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return mOrigin == ORIGIN_CONTENT;
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}
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bool IsOriginCurrentProcess() const
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{
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if (XRE_IsParentProcess()) {
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return IsOriginMainProcess();
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}
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return IsOriginContentProcess();
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}
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};
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struct InputContextAction final
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{
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/**
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* mCause indicates what action causes calling nsIWidget::SetInputContext().
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* It must be one of following values.
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*/
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enum Cause
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{
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// The cause is unknown but originated from content. Focus might have been
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// changed by content script.
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CAUSE_UNKNOWN,
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// The cause is unknown but originated from chrome. Focus might have been
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// changed by chrome script.
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CAUSE_UNKNOWN_CHROME,
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// The cause is user's keyboard operation.
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CAUSE_KEY,
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// The cause is user's mouse operation.
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CAUSE_MOUSE
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};
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Cause mCause;
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/**
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* mFocusChange indicates what happened for focus.
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*/
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enum FocusChange
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{
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FOCUS_NOT_CHANGED,
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// A content got focus.
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GOT_FOCUS,
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// Focused content lost focus.
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LOST_FOCUS,
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// Menu got pseudo focus that means focused content isn't changed but
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// keyboard events will be handled by menu.
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MENU_GOT_PSEUDO_FOCUS,
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// Menu lost pseudo focus that means focused content will handle keyboard
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// events.
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MENU_LOST_PSEUDO_FOCUS
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};
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FocusChange mFocusChange;
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bool ContentGotFocusByTrustedCause() const
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{
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return (mFocusChange == GOT_FOCUS &&
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mCause != CAUSE_UNKNOWN);
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}
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bool UserMightRequestOpenVKB() const
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{
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return (mFocusChange == FOCUS_NOT_CHANGED &&
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mCause == CAUSE_MOUSE);
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}
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InputContextAction()
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: mCause(CAUSE_UNKNOWN)
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, mFocusChange(FOCUS_NOT_CHANGED)
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{
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}
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explicit InputContextAction(Cause aCause,
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FocusChange aFocusChange = FOCUS_NOT_CHANGED)
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: mCause(aCause)
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, mFocusChange(aFocusChange)
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{
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}
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};
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// IMEMessage is shared by IMEStateManager and TextComposition.
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// Update values in GeckoEditable.java if you make changes here.
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// XXX Negative values are used in Android...
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typedef int8_t IMEMessageType;
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enum IMEMessage : IMEMessageType
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{
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// This is used by IMENotification internally. This means that the instance
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// hasn't been initialized yet.
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NOTIFY_IME_OF_NOTHING,
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// An editable content is getting focus
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NOTIFY_IME_OF_FOCUS,
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// An editable content is losing focus
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NOTIFY_IME_OF_BLUR,
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// Selection in the focused editable content is changed
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NOTIFY_IME_OF_SELECTION_CHANGE,
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// Text in the focused editable content is changed
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NOTIFY_IME_OF_TEXT_CHANGE,
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// Composition string has been updated
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NOTIFY_IME_OF_COMPOSITION_UPDATE,
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// Position or size of focused element may be changed.
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NOTIFY_IME_OF_POSITION_CHANGE,
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// Mouse button event is fired on a character in focused editor
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NOTIFY_IME_OF_MOUSE_BUTTON_EVENT,
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// Request to commit current composition to IME
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// (some platforms may not support)
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REQUEST_TO_COMMIT_COMPOSITION,
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// Request to cancel current composition to IME
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// (some platforms may not support)
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REQUEST_TO_CANCEL_COMPOSITION
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};
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struct IMENotification final
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{
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IMENotification()
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: mMessage(NOTIFY_IME_OF_NOTHING)
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{
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}
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IMENotification(const IMENotification& aOther)
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{
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Assign(aOther);
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}
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~IMENotification()
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{
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Clear();
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}
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MOZ_IMPLICIT IMENotification(IMEMessage aMessage)
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: mMessage(aMessage)
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{
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switch (aMessage) {
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case NOTIFY_IME_OF_SELECTION_CHANGE:
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mSelectionChangeData.mOffset = UINT32_MAX;
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mSelectionChangeData.mString = new nsString();
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mSelectionChangeData.mWritingMode = 0;
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mSelectionChangeData.mReversed = false;
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mSelectionChangeData.mCausedByComposition = false;
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mSelectionChangeData.mCausedBySelectionEvent = false;
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break;
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case NOTIFY_IME_OF_TEXT_CHANGE:
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mTextChangeData.Clear();
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break;
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case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
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mMouseButtonEventData.mEventMessage = 0;
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mMouseButtonEventData.mOffset = UINT32_MAX;
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mMouseButtonEventData.mCursorPos.Set(nsIntPoint(0, 0));
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mMouseButtonEventData.mCharRect.Set(nsIntRect(0, 0, 0, 0));
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mMouseButtonEventData.mButton = -1;
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mMouseButtonEventData.mButtons = 0;
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mMouseButtonEventData.mModifiers = 0;
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default:
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break;
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}
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}
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void Assign(const IMENotification& aOther)
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{
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Clear();
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mMessage = aOther.mMessage;
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switch (mMessage) {
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case NOTIFY_IME_OF_SELECTION_CHANGE:
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mSelectionChangeData = aOther.mSelectionChangeData;
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// mString should be different instance because of ownership issue.
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mSelectionChangeData.mString =
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new nsString(aOther.mSelectionChangeData.String());
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break;
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case NOTIFY_IME_OF_TEXT_CHANGE:
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mTextChangeData = aOther.mTextChangeData;
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break;
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case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
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mMouseButtonEventData = aOther.mMouseButtonEventData;
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break;
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default:
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break;
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}
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}
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IMENotification& operator=(const IMENotification& aOther)
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{
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Assign(aOther);
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return *this;
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}
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void Clear()
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{
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if (mMessage == NOTIFY_IME_OF_SELECTION_CHANGE) {
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MOZ_ASSERT(mSelectionChangeData.mString);
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delete mSelectionChangeData.mString;
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mSelectionChangeData.mString = nullptr;
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}
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mMessage = NOTIFY_IME_OF_NOTHING;
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}
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bool HasNotification() const
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{
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return mMessage != NOTIFY_IME_OF_NOTHING;
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}
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void MergeWith(const IMENotification& aNotification)
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{
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switch (mMessage) {
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case NOTIFY_IME_OF_NOTHING:
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MOZ_ASSERT(aNotification.mMessage != NOTIFY_IME_OF_NOTHING);
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Assign(aNotification);
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break;
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case NOTIFY_IME_OF_SELECTION_CHANGE:
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MOZ_ASSERT(aNotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE);
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mSelectionChangeData.mOffset =
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aNotification.mSelectionChangeData.mOffset;
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*mSelectionChangeData.mString =
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aNotification.mSelectionChangeData.String();
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mSelectionChangeData.mWritingMode =
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aNotification.mSelectionChangeData.mWritingMode;
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mSelectionChangeData.mReversed =
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aNotification.mSelectionChangeData.mReversed;
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if (!mSelectionChangeData.mCausedByComposition) {
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mSelectionChangeData.mCausedByComposition =
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aNotification.mSelectionChangeData.mCausedByComposition;
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} else {
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mSelectionChangeData.mCausedByComposition =
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mSelectionChangeData.mCausedByComposition &&
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aNotification.mSelectionChangeData.mCausedByComposition;
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}
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if (!mSelectionChangeData.mCausedBySelectionEvent) {
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mSelectionChangeData.mCausedBySelectionEvent =
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aNotification.mSelectionChangeData.mCausedBySelectionEvent;
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} else {
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mSelectionChangeData.mCausedBySelectionEvent =
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mSelectionChangeData.mCausedBySelectionEvent &&
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aNotification.mSelectionChangeData.mCausedBySelectionEvent;
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}
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break;
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case NOTIFY_IME_OF_TEXT_CHANGE:
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MOZ_ASSERT(aNotification.mMessage == NOTIFY_IME_OF_TEXT_CHANGE);
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mTextChangeData += aNotification.mTextChangeData;
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break;
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case NOTIFY_IME_OF_POSITION_CHANGE:
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case NOTIFY_IME_OF_COMPOSITION_UPDATE:
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MOZ_ASSERT(aNotification.mMessage == mMessage);
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break;
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default:
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MOZ_CRASH("Merging notification isn't supported");
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break;
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}
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}
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IMEMessage mMessage;
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struct Point
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{
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int32_t mX;
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int32_t mY;
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|
|
void Set(const nsIntPoint& aPoint)
|
|
{
|
|
mX = aPoint.x;
|
|
mY = aPoint.y;
|
|
}
|
|
nsIntPoint AsIntPoint() const
|
|
{
|
|
return nsIntPoint(mX, mY);
|
|
}
|
|
};
|
|
|
|
struct Rect
|
|
{
|
|
int32_t mX;
|
|
int32_t mY;
|
|
int32_t mWidth;
|
|
int32_t mHeight;
|
|
|
|
void Set(const nsIntRect& aRect)
|
|
{
|
|
mX = aRect.x;
|
|
mY = aRect.y;
|
|
mWidth = aRect.width;
|
|
mHeight = aRect.height;
|
|
}
|
|
nsIntRect AsIntRect() const
|
|
{
|
|
return nsIntRect(mX, mY, mWidth, mHeight);
|
|
}
|
|
};
|
|
|
|
// NOTIFY_IME_OF_SELECTION_CHANGE specific data
|
|
struct SelectionChangeData
|
|
{
|
|
// Selection range.
|
|
uint32_t mOffset;
|
|
|
|
// Selected string
|
|
nsString* mString;
|
|
|
|
// Writing mode at the selection.
|
|
uint8_t mWritingMode;
|
|
|
|
bool mReversed;
|
|
bool mCausedByComposition;
|
|
bool mCausedBySelectionEvent;
|
|
|
|
void SetWritingMode(const WritingMode& aWritingMode);
|
|
WritingMode GetWritingMode() const;
|
|
|
|
uint32_t StartOffset() const
|
|
{
|
|
return mOffset + (mReversed ? Length() : 0);
|
|
}
|
|
uint32_t EndOffset() const
|
|
{
|
|
return mOffset + (mReversed ? 0 : Length());
|
|
}
|
|
const nsString& String() const
|
|
{
|
|
return *mString;
|
|
}
|
|
uint32_t Length() const
|
|
{
|
|
return mString->Length();
|
|
}
|
|
bool IsInInt32Range() const
|
|
{
|
|
return mOffset + Length() <= INT32_MAX;
|
|
}
|
|
};
|
|
|
|
struct TextChangeDataBase
|
|
{
|
|
// mStartOffset is the start offset of modified or removed text in
|
|
// original content and inserted text in new content.
|
|
uint32_t mStartOffset;
|
|
// mRemovalEndOffset is the end offset of modified or removed text in
|
|
// original content. If the value is same as mStartOffset, no text hasn't
|
|
// been removed yet.
|
|
uint32_t mRemovedEndOffset;
|
|
// mAddedEndOffset is the end offset of inserted text or same as
|
|
// mStartOffset if just removed. The vlaue is offset in the new content.
|
|
uint32_t mAddedEndOffset;
|
|
|
|
bool mCausedByComposition;
|
|
|
|
uint32_t OldLength() const
|
|
{
|
|
MOZ_ASSERT(IsValid());
|
|
return mRemovedEndOffset - mStartOffset;
|
|
}
|
|
uint32_t NewLength() const
|
|
{
|
|
MOZ_ASSERT(IsValid());
|
|
return mAddedEndOffset - mStartOffset;
|
|
}
|
|
|
|
// Positive if text is added. Negative if text is removed.
|
|
int64_t Difference() const
|
|
{
|
|
return mAddedEndOffset - mRemovedEndOffset;
|
|
}
|
|
|
|
bool IsInInt32Range() const
|
|
{
|
|
MOZ_ASSERT(IsValid());
|
|
return mStartOffset <= INT32_MAX &&
|
|
mRemovedEndOffset <= INT32_MAX &&
|
|
mAddedEndOffset <= INT32_MAX;
|
|
}
|
|
|
|
bool IsValid() const
|
|
{
|
|
return !(mStartOffset == UINT32_MAX &&
|
|
!mRemovedEndOffset && !mAddedEndOffset);
|
|
}
|
|
|
|
void Clear()
|
|
{
|
|
mStartOffset = UINT32_MAX;
|
|
mRemovedEndOffset = mAddedEndOffset = 0;
|
|
}
|
|
|
|
void MergeWith(const TextChangeDataBase& aOther);
|
|
TextChangeDataBase& operator+=(const TextChangeDataBase& aOther)
|
|
{
|
|
MergeWith(aOther);
|
|
return *this;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void Test();
|
|
#endif // #ifdef DEBUG
|
|
};
|
|
|
|
// TextChangeDataBase cannot have constructors because they are used in union.
|
|
// Therefore, TextChangeData should only implement constructor. In other
|
|
// words, add other members to TextChangeDataBase.
|
|
struct TextChangeData : public TextChangeDataBase
|
|
{
|
|
TextChangeData() { Clear(); }
|
|
|
|
TextChangeData(uint32_t aStartOffset,
|
|
uint32_t aRemovedEndOffset,
|
|
uint32_t aAddedEndOffset,
|
|
bool aCausedByComposition)
|
|
{
|
|
MOZ_ASSERT(aRemovedEndOffset >= aStartOffset,
|
|
"removed end offset must not be smaller than start offset");
|
|
MOZ_ASSERT(aAddedEndOffset >= aStartOffset,
|
|
"added end offset must not be smaller than start offset");
|
|
mStartOffset = aStartOffset;
|
|
mRemovedEndOffset = aRemovedEndOffset;
|
|
mAddedEndOffset = aAddedEndOffset;
|
|
mCausedByComposition = aCausedByComposition;
|
|
}
|
|
};
|
|
|
|
struct MouseButtonEventData
|
|
{
|
|
// The value of WidgetEvent::message
|
|
uint32_t mEventMessage;
|
|
// Character offset from the start of the focused editor under the cursor
|
|
uint32_t mOffset;
|
|
// Cursor position in pixels relative to the widget
|
|
Point mCursorPos;
|
|
// Character rect in pixels under the cursor relative to the widget
|
|
Rect mCharRect;
|
|
// The value of WidgetMouseEventBase::button and buttons
|
|
int16_t mButton;
|
|
int16_t mButtons;
|
|
// The value of WidgetInputEvent::modifiers
|
|
Modifiers mModifiers;
|
|
};
|
|
|
|
union
|
|
{
|
|
// NOTIFY_IME_OF_SELECTION_CHANGE specific data
|
|
SelectionChangeData mSelectionChangeData;
|
|
|
|
// NOTIFY_IME_OF_TEXT_CHANGE specific data
|
|
TextChangeDataBase mTextChangeData;
|
|
|
|
// NOTIFY_IME_OF_MOUSE_BUTTON_EVENT specific data
|
|
MouseButtonEventData mMouseButtonEventData;
|
|
};
|
|
|
|
bool IsCausedByComposition() const
|
|
{
|
|
switch (mMessage) {
|
|
case NOTIFY_IME_OF_SELECTION_CHANGE:
|
|
return mSelectionChangeData.mCausedByComposition;
|
|
case NOTIFY_IME_OF_TEXT_CHANGE:
|
|
return mTextChangeData.mCausedByComposition;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
};
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|
|
|
|
#endif // #ifndef mozilla_widget_IMEData_h_
|