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e0dcff15d2
MozReview-Commit-ID: Eyz2HjIdQEW --HG-- extra : rebase_source : 182f4f8236dcfb83f8725a9c66cc46dedbb14f2c
948 lines
29 KiB
C++
948 lines
29 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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_TextEvents_h__
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#define mozilla_TextEvents_h__
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#include <stdint.h>
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#include "mozilla/Assertions.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/EventForwards.h" // for KeyNameIndex, temporarily
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#include "mozilla/TextRange.h"
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#include "mozilla/FontRange.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsISelectionController.h"
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#include "nsISelectionListener.h"
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#include "nsITransferable.h"
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#include "nsRect.h"
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#include "nsStringGlue.h"
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#include "nsTArray.h"
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#include "WritingModes.h"
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class nsStringHashKey;
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template<class, class> class nsDataHashtable;
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/******************************************************************************
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* virtual keycode values
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******************************************************************************/
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enum
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{
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#define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) NS_##aDOMKeyName = aDOMKeyCode,
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#include "mozilla/VirtualKeyCodeList.h"
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#undef NS_DEFINE_VK
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NS_VK_UNKNOWN = 0xFF
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};
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namespace mozilla {
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const nsCString GetDOMKeyCodeName(uint32_t aKeyCode);
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namespace dom {
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class PBrowserParent;
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class PBrowserChild;
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} // namespace dom
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namespace plugins {
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class PPluginInstanceChild;
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} // namespace plugins
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/******************************************************************************
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* mozilla::AlternativeCharCode
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*
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* This stores alternative charCode values of a key event with some modifiers.
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* The stored values proper for testing shortcut key or access key.
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******************************************************************************/
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struct AlternativeCharCode
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{
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AlternativeCharCode() :
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mUnshiftedCharCode(0), mShiftedCharCode(0)
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{
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}
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AlternativeCharCode(uint32_t aUnshiftedCharCode, uint32_t aShiftedCharCode) :
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mUnshiftedCharCode(aUnshiftedCharCode), mShiftedCharCode(aShiftedCharCode)
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{
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}
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uint32_t mUnshiftedCharCode;
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uint32_t mShiftedCharCode;
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};
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/******************************************************************************
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* mozilla::ShortcutKeyCandidate
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*
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* This stores a candidate of shortcut key combination.
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******************************************************************************/
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struct ShortcutKeyCandidate
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{
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ShortcutKeyCandidate(uint32_t aCharCode, bool aIgnoreShift)
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: mCharCode(aCharCode)
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, mIgnoreShift(aIgnoreShift)
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{
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}
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// The mCharCode value which must match keyboard shortcut definition.
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uint32_t mCharCode;
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// true if Shift state can be ignored. Otherwise, Shift key state must
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// match keyboard shortcut definition.
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bool mIgnoreShift;
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};
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/******************************************************************************
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* mozilla::WidgetKeyboardEvent
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******************************************************************************/
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class WidgetKeyboardEvent : public WidgetInputEvent
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{
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private:
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friend class dom::PBrowserParent;
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friend class dom::PBrowserChild;
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protected:
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WidgetKeyboardEvent()
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: mNativeKeyEvent(nullptr)
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, mKeyCode(0)
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, mCharCode(0)
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, mPseudoCharCode(0)
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, mLocation(nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD)
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, mAccessKeyForwardedToChild(false)
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, mUniqueId(0)
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#ifdef XP_MACOSX
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, mNativeModifierFlags(0)
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, mNativeKeyCode(0)
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#endif // #ifdef XP_MACOSX
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, mKeyNameIndex(mozilla::KEY_NAME_INDEX_Unidentified)
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, mCodeNameIndex(CODE_NAME_INDEX_UNKNOWN)
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, mInputMethodAppState(eNotHandled)
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, mIsChar(false)
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, mIsRepeat(false)
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, mIsComposing(false)
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, mIsReserved(false)
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, mIsSynthesizedByTIP(false)
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{
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}
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public:
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virtual WidgetKeyboardEvent* AsKeyboardEvent() override { return this; }
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WidgetKeyboardEvent(bool aIsTrusted, EventMessage aMessage,
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nsIWidget* aWidget,
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EventClassID aEventClassID = eKeyboardEventClass)
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: WidgetInputEvent(aIsTrusted, aMessage, aWidget, aEventClassID)
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, mNativeKeyEvent(nullptr)
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, mKeyCode(0)
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, mCharCode(0)
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, mPseudoCharCode(0)
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, mLocation(nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD)
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, mAccessKeyForwardedToChild(false)
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, mUniqueId(0)
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#ifdef XP_MACOSX
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, mNativeModifierFlags(0)
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, mNativeKeyCode(0)
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#endif // #ifdef XP_MACOSX
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, mKeyNameIndex(mozilla::KEY_NAME_INDEX_Unidentified)
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, mCodeNameIndex(CODE_NAME_INDEX_UNKNOWN)
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, mInputMethodAppState(eNotHandled)
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, mIsChar(false)
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, mIsRepeat(false)
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, mIsComposing(false)
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, mIsReserved(false)
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, mIsSynthesizedByTIP(false)
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{
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// If this is a keyboard event on a plugin, it shouldn't fired on content.
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mFlags.mOnlySystemGroupDispatchInContent =
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mFlags.mNoCrossProcessBoundaryForwarding = IsKeyEventOnPlugin();
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}
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static bool IsKeyDownOrKeyDownOnPlugin(EventMessage aMessage)
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{
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return aMessage == eKeyDown || aMessage == eKeyDownOnPlugin;
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}
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bool IsKeyDownOrKeyDownOnPlugin() const
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{
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return IsKeyDownOrKeyDownOnPlugin(mMessage);
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}
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static bool IsKeyUpOrKeyUpOnPlugin(EventMessage aMessage)
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{
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return aMessage == eKeyUp || aMessage == eKeyUpOnPlugin;
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}
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bool IsKeyUpOrKeyUpOnPlugin() const
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{
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return IsKeyUpOrKeyUpOnPlugin(mMessage);
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}
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static bool IsKeyEventOnPlugin(EventMessage aMessage)
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{
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return aMessage == eKeyDownOnPlugin || aMessage == eKeyUpOnPlugin;
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}
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bool IsKeyEventOnPlugin() const
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{
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return IsKeyEventOnPlugin(mMessage);
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}
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virtual WidgetEvent* Duplicate() const override
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{
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MOZ_ASSERT(mClass == eKeyboardEventClass,
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"Duplicate() must be overridden by sub class");
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// Not copying widget, it is a weak reference.
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WidgetKeyboardEvent* result =
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new WidgetKeyboardEvent(false, mMessage, nullptr);
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result->AssignKeyEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// OS translated Unicode chars which are used for accesskey and accelkey
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// handling. The handlers will try from first character to last character.
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nsTArray<AlternativeCharCode> mAlternativeCharCodes;
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// DOM KeyboardEvent.key only when mKeyNameIndex is KEY_NAME_INDEX_USE_STRING.
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nsString mKeyValue;
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// DOM KeyboardEvent.code only when mCodeNameIndex is
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// CODE_NAME_INDEX_USE_STRING.
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nsString mCodeValue;
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#ifdef XP_MACOSX
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// Values given by a native NSEvent, for use with Cocoa NPAPI plugins.
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nsString mNativeCharacters;
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nsString mNativeCharactersIgnoringModifiers;
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// If this is non-empty, create a text event for plugins instead of a
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// keyboard event.
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nsString mPluginTextEventString;
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#endif // #ifdef XP_MACOSX
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// OS-specific native event can optionally be preserved
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void* mNativeKeyEvent;
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// A DOM keyCode value or 0. If a keypress event whose mCharCode is 0, this
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// should be 0.
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uint32_t mKeyCode;
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// If the instance is a keypress event of a printable key, this is a UTF-16
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// value of the key. Otherwise, 0. This value must not be a control
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// character when some modifiers are active. Then, this value should be an
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// unmodified value except Shift and AltGr.
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uint32_t mCharCode;
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// mPseudoCharCode is valid only when mMessage is an eKeyDown event.
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// This stores mCharCode value of keypress event which is fired with same
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// key value and same modifier state.
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uint32_t mPseudoCharCode;
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// One of nsIDOMKeyEvent::DOM_KEY_LOCATION_*
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uint32_t mLocation;
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// True if accesskey handling was forwarded to the child via
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// TabParent::HandleAccessKey. In this case, parent process menu access key
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// handling should be delayed until it is determined that there exists no
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// overriding access key in the content process.
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bool mAccessKeyForwardedToChild;
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// Unique id associated with a keydown / keypress event. Used in identifing
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// keypress events for removal from async event dispatch queue in metrofx
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// after preventDefault is called on keydown events. It's ok if this wraps
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// over long periods.
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uint32_t mUniqueId;
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#ifdef XP_MACOSX
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// Values given by a native NSEvent, for use with Cocoa NPAPI plugins.
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uint32_t mNativeModifierFlags;
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uint16_t mNativeKeyCode;
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#endif // #ifdef XP_MACOSX
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// DOM KeyboardEvent.key
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KeyNameIndex mKeyNameIndex;
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// DOM KeyboardEvent.code
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CodeNameIndex mCodeNameIndex;
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// Indicates that the event is being handled by input method app
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typedef uint8_t InputMethodAppStateType;
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enum InputMethodAppState : InputMethodAppStateType
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{
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eNotHandled, // not yet handled by intput method app
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eHandling, // being handled by intput method app
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eHandled // handled by input method app
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};
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InputMethodAppState mInputMethodAppState;
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// Indicates whether the event signifies a printable character
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bool mIsChar;
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// Indicates whether the event is generated by auto repeat or not.
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// if this is keyup event, always false.
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bool mIsRepeat;
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// Indicates whether the event is generated during IME (or deadkey)
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// composition. This is initialized by EventStateManager. So, key event
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// dispatchers don't need to initialize this.
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bool mIsComposing;
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// Indicates if the key combination is reserved by chrome. This is set by
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// nsXBLWindowKeyHandler at capturing phase of the default event group.
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bool mIsReserved;
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// Indicates whether the event is synthesized from Text Input Processor
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// or an actual event from nsAppShell.
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bool mIsSynthesizedByTIP;
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// If the key should cause keypress events, this returns true.
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// Otherwise, false.
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bool ShouldCauseKeypressEvents() const;
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// mCharCode value of non-eKeyPress events is always 0. However, if
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// non-eKeyPress event has one or more alternative char code values,
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// its first item should be the mCharCode value of following eKeyPress event.
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// PseudoCharCode() returns mCharCode value for eKeyPress event,
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// the first alternative char code value of non-eKeyPress event or 0.
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uint32_t PseudoCharCode() const
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{
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return mMessage == eKeyPress ? mCharCode : mPseudoCharCode;
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}
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void SetCharCode(uint32_t aCharCode)
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{
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if (mMessage == eKeyPress) {
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mCharCode = aCharCode;
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} else {
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mPseudoCharCode = aCharCode;
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}
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}
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void GetDOMKeyName(nsAString& aKeyName)
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{
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if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING) {
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aKeyName = mKeyValue;
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return;
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}
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GetDOMKeyName(mKeyNameIndex, aKeyName);
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}
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void GetDOMCodeName(nsAString& aCodeName)
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{
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if (mCodeNameIndex == CODE_NAME_INDEX_USE_STRING) {
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aCodeName = mCodeValue;
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return;
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}
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GetDOMCodeName(mCodeNameIndex, aCodeName);
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}
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bool IsModifierKeyEvent() const
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{
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return GetModifierForKeyName(mKeyNameIndex) != MODIFIER_NONE;
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}
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/**
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* Get the candidates for shortcut key.
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*
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* @param aCandidates [out] the candidate shortcut key combination list.
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* the first item is most preferred.
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*/
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void GetShortcutKeyCandidates(ShortcutKeyCandidateArray& aCandidates);
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/**
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* Get the candidates for access key.
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*
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* @param aCandidates [out] the candidate access key list.
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* the first item is most preferred.
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*/
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void GetAccessKeyCandidates(nsTArray<uint32_t>& aCandidates);
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static void Shutdown();
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/**
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* ComputeLocationFromCodeValue() returns one of .mLocation value
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* (nsIDOMKeyEvent::DOM_KEY_LOCATION_*) which is the most preferred value
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* for the specified specified code value.
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*/
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static uint32_t ComputeLocationFromCodeValue(CodeNameIndex aCodeNameIndex);
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/**
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* ComputeKeyCodeFromKeyNameIndex() return a .mKeyCode value which can be
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* mapped from the specified key value. Note that this returns 0 if the
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* key name index is KEY_NAME_INDEX_Unidentified or KEY_NAME_INDEX_USE_STRING.
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* This means that this method is useful only for non-printable keys.
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*/
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static uint32_t ComputeKeyCodeFromKeyNameIndex(KeyNameIndex aKeyNameIndex);
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/**
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* GetModifierForKeyName() returns a value of Modifier which is activated
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* by the aKeyNameIndex.
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*/
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static Modifier GetModifierForKeyName(KeyNameIndex aKeyNameIndex);
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/**
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* IsLockableModifier() returns true if aKeyNameIndex is a lockable modifier
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* key such as CapsLock and NumLock.
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*/
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static bool IsLockableModifier(KeyNameIndex aKeyNameIndex);
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static void GetDOMKeyName(KeyNameIndex aKeyNameIndex,
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nsAString& aKeyName);
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static void GetDOMCodeName(CodeNameIndex aCodeNameIndex,
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nsAString& aCodeName);
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static KeyNameIndex GetKeyNameIndex(const nsAString& aKeyValue);
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static CodeNameIndex GetCodeNameIndex(const nsAString& aCodeValue);
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static const char* GetCommandStr(Command aCommand);
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void AssignKeyEventData(const WidgetKeyboardEvent& aEvent, bool aCopyTargets)
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{
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AssignInputEventData(aEvent, aCopyTargets);
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mKeyCode = aEvent.mKeyCode;
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mCharCode = aEvent.mCharCode;
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mPseudoCharCode = aEvent.mPseudoCharCode;
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mLocation = aEvent.mLocation;
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mAlternativeCharCodes = aEvent.mAlternativeCharCodes;
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mIsChar = aEvent.mIsChar;
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mIsRepeat = aEvent.mIsRepeat;
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mIsComposing = aEvent.mIsComposing;
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mIsReserved = aEvent.mIsReserved;
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mAccessKeyForwardedToChild = aEvent.mAccessKeyForwardedToChild;
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mKeyNameIndex = aEvent.mKeyNameIndex;
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mCodeNameIndex = aEvent.mCodeNameIndex;
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mKeyValue = aEvent.mKeyValue;
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mCodeValue = aEvent.mCodeValue;
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// Don't copy mNativeKeyEvent because it may be referred after its instance
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// is destroyed.
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mNativeKeyEvent = nullptr;
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mUniqueId = aEvent.mUniqueId;
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#ifdef XP_MACOSX
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mNativeKeyCode = aEvent.mNativeKeyCode;
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mNativeModifierFlags = aEvent.mNativeModifierFlags;
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mNativeCharacters.Assign(aEvent.mNativeCharacters);
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mNativeCharactersIgnoringModifiers.
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Assign(aEvent.mNativeCharactersIgnoringModifiers);
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mPluginTextEventString.Assign(aEvent.mPluginTextEventString);
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#endif
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mInputMethodAppState = aEvent.mInputMethodAppState;
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mIsSynthesizedByTIP = aEvent.mIsSynthesizedByTIP;
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}
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private:
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static const char16_t* const kKeyNames[];
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static const char16_t* const kCodeNames[];
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typedef nsDataHashtable<nsStringHashKey,
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KeyNameIndex> KeyNameIndexHashtable;
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typedef nsDataHashtable<nsStringHashKey,
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CodeNameIndex> CodeNameIndexHashtable;
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static KeyNameIndexHashtable* sKeyNameIndexHashtable;
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static CodeNameIndexHashtable* sCodeNameIndexHashtable;
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};
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|
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/******************************************************************************
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* mozilla::WidgetCompositionEvent
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******************************************************************************/
|
|
|
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class WidgetCompositionEvent : public WidgetGUIEvent
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{
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private:
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friend class mozilla::dom::PBrowserParent;
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friend class mozilla::dom::PBrowserChild;
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WidgetCompositionEvent()
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{
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}
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public:
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virtual WidgetCompositionEvent* AsCompositionEvent() override
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{
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return this;
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}
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WidgetCompositionEvent(bool aIsTrusted, EventMessage aMessage,
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nsIWidget* aWidget)
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: WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eCompositionEventClass)
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, mNativeIMEContext(aWidget)
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, mOriginalMessage(eVoidEvent)
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{
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}
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virtual WidgetEvent* Duplicate() const override
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{
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MOZ_ASSERT(mClass == eCompositionEventClass,
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"Duplicate() must be overridden by sub class");
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// Not copying widget, it is a weak reference.
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WidgetCompositionEvent* result =
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new WidgetCompositionEvent(false, mMessage, nullptr);
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result->AssignCompositionEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// The composition string or the commit string. If the instance is a
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// compositionstart event, this is initialized with selected text by
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// TextComposition automatically.
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nsString mData;
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RefPtr<TextRangeArray> mRanges;
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// mNativeIMEContext stores the native IME context which causes the
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// composition event.
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widget::NativeIMEContext mNativeIMEContext;
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// If the instance is a clone of another event, mOriginalMessage stores
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// the another event's mMessage.
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EventMessage mOriginalMessage;
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|
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void AssignCompositionEventData(const WidgetCompositionEvent& aEvent,
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bool aCopyTargets)
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{
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AssignGUIEventData(aEvent, aCopyTargets);
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mData = aEvent.mData;
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mOriginalMessage = aEvent.mOriginalMessage;
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mRanges = aEvent.mRanges;
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// Currently, we don't need to copy the other members because they are
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// for internal use only (not available from JS).
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}
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bool IsComposing() const
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{
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return mRanges && mRanges->IsComposing();
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}
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uint32_t TargetClauseOffset() const
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{
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return mRanges ? mRanges->TargetClauseOffset() : 0;
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}
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uint32_t TargetClauseLength() const
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{
|
|
uint32_t length = UINT32_MAX;
|
|
if (mRanges) {
|
|
length = mRanges->TargetClauseLength();
|
|
}
|
|
return length == UINT32_MAX ? mData.Length() : length;
|
|
}
|
|
|
|
uint32_t RangeCount() const
|
|
{
|
|
return mRanges ? mRanges->Length() : 0;
|
|
}
|
|
|
|
bool CausesDOMTextEvent() const
|
|
{
|
|
return mMessage == eCompositionChange ||
|
|
mMessage == eCompositionCommit ||
|
|
mMessage == eCompositionCommitAsIs;
|
|
}
|
|
|
|
bool CausesDOMCompositionEndEvent() const
|
|
{
|
|
return mMessage == eCompositionEnd ||
|
|
mMessage == eCompositionCommit ||
|
|
mMessage == eCompositionCommitAsIs;
|
|
}
|
|
|
|
bool IsFollowedByCompositionEnd() const
|
|
{
|
|
return IsFollowedByCompositionEnd(mOriginalMessage);
|
|
}
|
|
|
|
static bool IsFollowedByCompositionEnd(EventMessage aEventMessage)
|
|
{
|
|
return aEventMessage == eCompositionCommit ||
|
|
aEventMessage == eCompositionCommitAsIs;
|
|
}
|
|
};
|
|
|
|
/******************************************************************************
|
|
* mozilla::WidgetQueryContentEvent
|
|
******************************************************************************/
|
|
|
|
class WidgetQueryContentEvent : public WidgetGUIEvent
|
|
{
|
|
private:
|
|
friend class dom::PBrowserParent;
|
|
friend class dom::PBrowserChild;
|
|
|
|
WidgetQueryContentEvent()
|
|
: mSucceeded(false)
|
|
, mUseNativeLineBreak(true)
|
|
, mWithFontRanges(false)
|
|
{
|
|
MOZ_CRASH("WidgetQueryContentEvent is created without proper arguments");
|
|
}
|
|
|
|
public:
|
|
virtual WidgetQueryContentEvent* AsQueryContentEvent() override
|
|
{
|
|
return this;
|
|
}
|
|
|
|
WidgetQueryContentEvent(bool aIsTrusted, EventMessage aMessage,
|
|
nsIWidget* aWidget)
|
|
: WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eQueryContentEventClass)
|
|
, mSucceeded(false)
|
|
, mUseNativeLineBreak(true)
|
|
, mWithFontRanges(false)
|
|
{
|
|
}
|
|
|
|
WidgetQueryContentEvent(EventMessage aMessage,
|
|
const WidgetQueryContentEvent& aOtherEvent)
|
|
: WidgetGUIEvent(aOtherEvent.IsTrusted(), aMessage,
|
|
const_cast<nsIWidget*>(aOtherEvent.mWidget.get()),
|
|
eQueryContentEventClass)
|
|
, mSucceeded(false)
|
|
, mUseNativeLineBreak(aOtherEvent.mUseNativeLineBreak)
|
|
, mWithFontRanges(false)
|
|
{
|
|
}
|
|
|
|
virtual WidgetEvent* Duplicate() const override
|
|
{
|
|
// This event isn't an internal event of any DOM event.
|
|
NS_ASSERTION(!IsAllowedToDispatchDOMEvent(),
|
|
"WidgetQueryContentEvent needs to support Duplicate()");
|
|
MOZ_CRASH("WidgetQueryContentEvent doesn't support Duplicate()");
|
|
}
|
|
|
|
struct Options final
|
|
{
|
|
bool mUseNativeLineBreak;
|
|
bool mRelativeToInsertionPoint;
|
|
|
|
explicit Options()
|
|
: mUseNativeLineBreak(true)
|
|
, mRelativeToInsertionPoint(false)
|
|
{
|
|
}
|
|
|
|
explicit Options(const WidgetQueryContentEvent& aEvent)
|
|
: mUseNativeLineBreak(aEvent.mUseNativeLineBreak)
|
|
, mRelativeToInsertionPoint(aEvent.mInput.mRelativeToInsertionPoint)
|
|
{
|
|
}
|
|
};
|
|
|
|
void Init(const Options& aOptions)
|
|
{
|
|
mUseNativeLineBreak = aOptions.mUseNativeLineBreak;
|
|
mInput.mRelativeToInsertionPoint = aOptions.mRelativeToInsertionPoint;
|
|
MOZ_ASSERT(mInput.IsValidEventMessage(mMessage));
|
|
}
|
|
|
|
void InitForQueryTextContent(int64_t aOffset, uint32_t aLength,
|
|
const Options& aOptions = Options())
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryTextContent,
|
|
"wrong initializer is called");
|
|
mInput.mOffset = aOffset;
|
|
mInput.mLength = aLength;
|
|
Init(aOptions);
|
|
MOZ_ASSERT(mInput.IsValidOffset());
|
|
}
|
|
|
|
void InitForQueryCaretRect(int64_t aOffset,
|
|
const Options& aOptions = Options())
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryCaretRect,
|
|
"wrong initializer is called");
|
|
mInput.mOffset = aOffset;
|
|
Init(aOptions);
|
|
MOZ_ASSERT(mInput.IsValidOffset());
|
|
}
|
|
|
|
void InitForQueryTextRect(int64_t aOffset, uint32_t aLength,
|
|
const Options& aOptions = Options())
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryTextRect,
|
|
"wrong initializer is called");
|
|
mInput.mOffset = aOffset;
|
|
mInput.mLength = aLength;
|
|
Init(aOptions);
|
|
MOZ_ASSERT(mInput.IsValidOffset());
|
|
}
|
|
|
|
void InitForQuerySelectedText(SelectionType aSelectionType,
|
|
const Options& aOptions = Options())
|
|
{
|
|
MOZ_ASSERT(mMessage == eQuerySelectedText);
|
|
MOZ_ASSERT(aSelectionType != SelectionType::eNone);
|
|
mInput.mSelectionType = aSelectionType;
|
|
Init(aOptions);
|
|
}
|
|
|
|
void InitForQueryDOMWidgetHittest(const mozilla::LayoutDeviceIntPoint& aPoint)
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryDOMWidgetHittest,
|
|
"wrong initializer is called");
|
|
mRefPoint = aPoint;
|
|
}
|
|
|
|
void InitForQueryTextRectArray(uint32_t aOffset, uint32_t aLength,
|
|
const Options& aOptions = Options())
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryTextRectArray,
|
|
"wrong initializer is called");
|
|
mInput.mOffset = aOffset;
|
|
mInput.mLength = aLength;
|
|
Init(aOptions);
|
|
}
|
|
|
|
void RequestFontRanges()
|
|
{
|
|
NS_ASSERTION(mMessage == eQueryTextContent,
|
|
"not querying text content");
|
|
mWithFontRanges = true;
|
|
}
|
|
|
|
uint32_t GetSelectionStart(void) const
|
|
{
|
|
NS_ASSERTION(mMessage == eQuerySelectedText,
|
|
"not querying selection");
|
|
return mReply.mOffset + (mReply.mReversed ? mReply.mString.Length() : 0);
|
|
}
|
|
|
|
uint32_t GetSelectionEnd(void) const
|
|
{
|
|
NS_ASSERTION(mMessage == eQuerySelectedText,
|
|
"not querying selection");
|
|
return mReply.mOffset + (mReply.mReversed ? 0 : mReply.mString.Length());
|
|
}
|
|
|
|
mozilla::WritingMode GetWritingMode(void) const
|
|
{
|
|
NS_ASSERTION(mMessage == eQuerySelectedText ||
|
|
mMessage == eQueryCaretRect ||
|
|
mMessage == eQueryTextRect,
|
|
"not querying selection or text rect");
|
|
return mReply.mWritingMode;
|
|
}
|
|
|
|
bool mSucceeded;
|
|
bool mUseNativeLineBreak;
|
|
bool mWithFontRanges;
|
|
struct Input final
|
|
{
|
|
uint32_t EndOffset() const
|
|
{
|
|
CheckedInt<uint32_t> endOffset =
|
|
CheckedInt<uint32_t>(mOffset) + mLength;
|
|
return NS_WARN_IF(!endOffset.isValid()) ? UINT32_MAX : endOffset.value();
|
|
}
|
|
|
|
int64_t mOffset;
|
|
uint32_t mLength;
|
|
SelectionType mSelectionType;
|
|
// If mOffset is true, mOffset is relative to the start offset of
|
|
// composition if there is, otherwise, the start of the first selection
|
|
// range.
|
|
bool mRelativeToInsertionPoint;
|
|
|
|
Input()
|
|
: mOffset(0)
|
|
, mLength(0)
|
|
, mSelectionType(SelectionType::eNormal)
|
|
, mRelativeToInsertionPoint(false)
|
|
{
|
|
}
|
|
|
|
bool IsValidOffset() const
|
|
{
|
|
return mRelativeToInsertionPoint || mOffset >= 0;
|
|
}
|
|
bool IsValidEventMessage(EventMessage aEventMessage) const
|
|
{
|
|
if (!mRelativeToInsertionPoint) {
|
|
return true;
|
|
}
|
|
switch (aEventMessage) {
|
|
case eQueryTextContent:
|
|
case eQueryCaretRect:
|
|
case eQueryTextRect:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
bool MakeOffsetAbsolute(uint32_t aInsertionPointOffset)
|
|
{
|
|
if (NS_WARN_IF(!mRelativeToInsertionPoint)) {
|
|
return true;
|
|
}
|
|
mRelativeToInsertionPoint = false;
|
|
// If mOffset + aInsertionPointOffset becomes negative value,
|
|
// we should assume the absolute offset is 0.
|
|
if (mOffset < 0 && -mOffset > aInsertionPointOffset) {
|
|
mOffset = 0;
|
|
return true;
|
|
}
|
|
// Otherwise, we don't allow too large offset.
|
|
CheckedInt<uint32_t> absOffset = mOffset + aInsertionPointOffset;
|
|
if (NS_WARN_IF(!absOffset.isValid())) {
|
|
mOffset = UINT32_MAX;
|
|
return false;
|
|
}
|
|
mOffset = absOffset.value();
|
|
return true;
|
|
}
|
|
} mInput;
|
|
|
|
struct Reply final
|
|
{
|
|
void* mContentsRoot;
|
|
uint32_t mOffset;
|
|
// mTentativeCaretOffset is used by only eQueryCharacterAtPoint.
|
|
// This is the offset where caret would be if user clicked at the mRefPoint.
|
|
uint32_t mTentativeCaretOffset;
|
|
nsString mString;
|
|
// mRect is used by eQueryTextRect, eQueryCaretRect, eQueryCharacterAtPoint
|
|
// and eQueryEditorRect. The coordinates is system coordinates relative to
|
|
// the top level widget of mFocusedWidget. E.g., if a <xul:panel> which
|
|
// is owned by a window has focused editor, the offset of mRect is relative
|
|
// to the owner window, not the <xul:panel>.
|
|
mozilla::LayoutDeviceIntRect mRect;
|
|
// The return widget has the caret. This is set at all query events.
|
|
nsIWidget* mFocusedWidget;
|
|
// mozilla::WritingMode value at the end (focus) of the selection
|
|
mozilla::WritingMode mWritingMode;
|
|
// Used by eQuerySelectionAsTransferable
|
|
nsCOMPtr<nsITransferable> mTransferable;
|
|
// Used by eQueryTextContent with font ranges requested
|
|
AutoTArray<mozilla::FontRange, 1> mFontRanges;
|
|
// Used by eQueryTextRectArray
|
|
nsTArray<mozilla::LayoutDeviceIntRect> mRectArray;
|
|
// true if selection is reversed (end < start)
|
|
bool mReversed;
|
|
// true if the selection exists
|
|
bool mHasSelection;
|
|
// true if DOM element under mouse belongs to widget
|
|
bool mWidgetIsHit;
|
|
|
|
Reply()
|
|
: mContentsRoot(nullptr)
|
|
, mOffset(NOT_FOUND)
|
|
, mTentativeCaretOffset(NOT_FOUND)
|
|
, mFocusedWidget(nullptr)
|
|
, mReversed(false)
|
|
, mHasSelection(false)
|
|
, mWidgetIsHit(false)
|
|
{
|
|
}
|
|
} mReply;
|
|
|
|
enum
|
|
{
|
|
NOT_FOUND = UINT32_MAX
|
|
};
|
|
|
|
// values of mComputedScrollAction
|
|
enum
|
|
{
|
|
SCROLL_ACTION_NONE,
|
|
SCROLL_ACTION_LINE,
|
|
SCROLL_ACTION_PAGE
|
|
};
|
|
};
|
|
|
|
/******************************************************************************
|
|
* mozilla::WidgetSelectionEvent
|
|
******************************************************************************/
|
|
|
|
class WidgetSelectionEvent : public WidgetGUIEvent
|
|
{
|
|
private:
|
|
friend class mozilla::dom::PBrowserParent;
|
|
friend class mozilla::dom::PBrowserChild;
|
|
|
|
WidgetSelectionEvent()
|
|
: mOffset(0)
|
|
, mLength(0)
|
|
, mReversed(false)
|
|
, mExpandToClusterBoundary(true)
|
|
, mSucceeded(false)
|
|
, mUseNativeLineBreak(true)
|
|
{
|
|
}
|
|
|
|
public:
|
|
virtual WidgetSelectionEvent* AsSelectionEvent() override
|
|
{
|
|
return this;
|
|
}
|
|
|
|
WidgetSelectionEvent(bool aIsTrusted, EventMessage aMessage,
|
|
nsIWidget* aWidget)
|
|
: WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eSelectionEventClass)
|
|
, mOffset(0)
|
|
, mLength(0)
|
|
, mReversed(false)
|
|
, mExpandToClusterBoundary(true)
|
|
, mSucceeded(false)
|
|
, mUseNativeLineBreak(true)
|
|
, mReason(nsISelectionListener::NO_REASON)
|
|
{
|
|
}
|
|
|
|
virtual WidgetEvent* Duplicate() const override
|
|
{
|
|
// This event isn't an internal event of any DOM event.
|
|
NS_ASSERTION(!IsAllowedToDispatchDOMEvent(),
|
|
"WidgetSelectionEvent needs to support Duplicate()");
|
|
MOZ_CRASH("WidgetSelectionEvent doesn't support Duplicate()");
|
|
return nullptr;
|
|
}
|
|
|
|
// Start offset of selection
|
|
uint32_t mOffset;
|
|
// Length of selection
|
|
uint32_t mLength;
|
|
// Selection "anchor" should be in front
|
|
bool mReversed;
|
|
// Cluster-based or character-based
|
|
bool mExpandToClusterBoundary;
|
|
// true if setting selection succeeded.
|
|
bool mSucceeded;
|
|
// true if native line breaks are used for mOffset and mLength
|
|
bool mUseNativeLineBreak;
|
|
// Fennec provides eSetSelection reason codes for downstream
|
|
// use in AccessibleCaret visibility logic.
|
|
int16_t mReason;
|
|
};
|
|
|
|
/******************************************************************************
|
|
* mozilla::InternalEditorInputEvent
|
|
******************************************************************************/
|
|
|
|
class InternalEditorInputEvent : public InternalUIEvent
|
|
{
|
|
private:
|
|
InternalEditorInputEvent()
|
|
: mIsComposing(false)
|
|
{
|
|
}
|
|
|
|
public:
|
|
virtual InternalEditorInputEvent* AsEditorInputEvent() override
|
|
{
|
|
return this;
|
|
}
|
|
|
|
InternalEditorInputEvent(bool aIsTrusted, EventMessage aMessage,
|
|
nsIWidget* aWidget)
|
|
: InternalUIEvent(aIsTrusted, aMessage, aWidget, eEditorInputEventClass)
|
|
, mIsComposing(false)
|
|
{
|
|
}
|
|
|
|
virtual WidgetEvent* Duplicate() const override
|
|
{
|
|
MOZ_ASSERT(mClass == eEditorInputEventClass,
|
|
"Duplicate() must be overridden by sub class");
|
|
// Not copying widget, it is a weak reference.
|
|
InternalEditorInputEvent* result =
|
|
new InternalEditorInputEvent(false, mMessage, nullptr);
|
|
result->AssignEditorInputEventData(*this, true);
|
|
result->mFlags = mFlags;
|
|
return result;
|
|
}
|
|
|
|
bool mIsComposing;
|
|
|
|
void AssignEditorInputEventData(const InternalEditorInputEvent& aEvent,
|
|
bool aCopyTargets)
|
|
{
|
|
AssignUIEventData(aEvent, aCopyTargets);
|
|
|
|
mIsComposing = aEvent.mIsComposing;
|
|
}
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_TextEvents_h__
|