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