Quelle GeckoEditableSupport.cpp Sprache: C

/* -*- Mode: c++; c-basic-offset: 2; tab-width: 4; indent-tabs-mode: nil; -*-
* vim: set sw=2 ts=4 expandtab:
* 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/. */

#include "GeckoEditableSupport.h"

#include "AndroidRect.h"
#include "KeyEvent.h"
#include "PuppetWidget.h"
#include "nsIContent.h"
#include "nsITransferable.h"
#include "nsStringStream.h"

#include "mozilla/dom/ContentChild.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/java/GeckoEditableChildWrappers.h"
#include "mozilla/java/GeckoServiceChildProcessWrappers.h"
#include "mozilla/jni/NativesInlines.h"
#include "mozilla/Logging.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_intl.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEventDispatcherListener.h"
#include "mozilla/TextEvents.h"
#include "mozilla/ToString.h"
#include "mozilla/dom/BrowserChild.h"
#include "mozilla/widget/GeckoViewSupport.h"

#include <android/api-level.h>
#include <android/input.h>
#include <android/log.h>

#ifdef NIGHTLY_BUILD
static mozilla::LazyLogModule sGeckoEditableSupportLog("GeckoEditableSupport");
#  define ALOGIME(...) \
    MOZ_LOG(sGeckoEditableSupportLog, LogLevel::Debug, (__VA_ARGS__))
#else
#  define ALOGIME(args...) \
    do {                   \
    } while (0)
#endif

static uint32_t ConvertAndroidKeyCodeToDOMKeyCode(int32_t androidKeyCode) {
  // Special-case alphanumeric keycodes because they are most common.
  if (androidKeyCode >= AKEYCODE_A && androidKeyCode <= AKEYCODE_Z) {
    return androidKeyCode - AKEYCODE_A + NS_VK_A;
  }

  if (androidKeyCode >= AKEYCODE_0 && androidKeyCode <= AKEYCODE_9) {
    return androidKeyCode - AKEYCODE_0 + NS_VK_0;
  }

  switch (androidKeyCode) {
    // KEYCODE_UNKNOWN (0) ... KEYCODE_HOME (3)
    case AKEYCODE_BACK:
      return NS_VK_ESCAPE;
    // KEYCODE_CALL (5) ... KEYCODE_POUND (18)
    case AKEYCODE_DPAD_UP:
      return NS_VK_UP;
    case AKEYCODE_DPAD_DOWN:
      return NS_VK_DOWN;
    case AKEYCODE_DPAD_LEFT:
      return NS_VK_LEFT;
    case AKEYCODE_DPAD_RIGHT:
      return NS_VK_RIGHT;
    case AKEYCODE_DPAD_CENTER:
      return NS_VK_RETURN;
    case AKEYCODE_VOLUME_UP:
      return NS_VK_VOLUME_UP;
    case AKEYCODE_VOLUME_DOWN:
      return NS_VK_VOLUME_DOWN;
    // KEYCODE_VOLUME_POWER (26) ... KEYCODE_Z (54)
    case AKEYCODE_COMMA:
      return NS_VK_COMMA;
    case AKEYCODE_PERIOD:
      return NS_VK_PERIOD;
    case AKEYCODE_ALT_LEFT:
      return NS_VK_ALT;
    case AKEYCODE_ALT_RIGHT:
      return NS_VK_ALT;
    case AKEYCODE_SHIFT_LEFT:
      return NS_VK_SHIFT;
    case AKEYCODE_SHIFT_RIGHT:
      return NS_VK_SHIFT;
    case AKEYCODE_TAB:
      return NS_VK_TAB;
    case AKEYCODE_SPACE:
      return NS_VK_SPACE;
    // KEYCODE_SYM (63) ... KEYCODE_ENVELOPE (65)
    case AKEYCODE_ENTER:
      return NS_VK_RETURN;
    case AKEYCODE_DEL:
      return NS_VK_BACK;  // Backspace
    case AKEYCODE_GRAVE:
      return NS_VK_BACK_QUOTE;
    // KEYCODE_MINUS (69)
    case AKEYCODE_EQUALS:
      return NS_VK_EQUALS;
    case AKEYCODE_LEFT_BRACKET:
      return NS_VK_OPEN_BRACKET;
    case AKEYCODE_RIGHT_BRACKET:
      return NS_VK_CLOSE_BRACKET;
    case AKEYCODE_BACKSLASH:
      return NS_VK_BACK_SLASH;
    case AKEYCODE_SEMICOLON:
      return NS_VK_SEMICOLON;
    // KEYCODE_APOSTROPHE (75)
    case AKEYCODE_SLASH:
      return NS_VK_SLASH;
    // KEYCODE_AT (77) ... KEYCODE_MEDIA_FAST_FORWARD (90)
    case AKEYCODE_MUTE:
      return NS_VK_VOLUME_MUTE;
    case AKEYCODE_PAGE_UP:
      return NS_VK_PAGE_UP;
    case AKEYCODE_PAGE_DOWN:
      return NS_VK_PAGE_DOWN;
    // KEYCODE_PICTSYMBOLS (94) ... KEYCODE_BUTTON_MODE (110)
    case AKEYCODE_ESCAPE:
      return NS_VK_ESCAPE;
    case AKEYCODE_FORWARD_DEL:
      return NS_VK_DELETE;
    case AKEYCODE_CTRL_LEFT:
      return NS_VK_CONTROL;
    case AKEYCODE_CTRL_RIGHT:
      return NS_VK_CONTROL;
    case AKEYCODE_CAPS_LOCK:
      return NS_VK_CAPS_LOCK;
    case AKEYCODE_SCROLL_LOCK:
      return NS_VK_SCROLL_LOCK;
    // KEYCODE_META_LEFT (117) ... KEYCODE_FUNCTION (119)
    case AKEYCODE_SYSRQ:
      return NS_VK_PRINTSCREEN;
    case AKEYCODE_BREAK:
      return NS_VK_PAUSE;
    case AKEYCODE_MOVE_HOME:
      return NS_VK_HOME;
    case AKEYCODE_MOVE_END:
      return NS_VK_END;
    case AKEYCODE_INSERT:
      return NS_VK_INSERT;
    // KEYCODE_FORWARD (125) ... KEYCODE_MEDIA_RECORD (130)
    case AKEYCODE_F1:
      return NS_VK_F1;
    case AKEYCODE_F2:
      return NS_VK_F2;
    case AKEYCODE_F3:
      return NS_VK_F3;
    case AKEYCODE_F4:
      return NS_VK_F4;
    case AKEYCODE_F5:
      return NS_VK_F5;
    case AKEYCODE_F6:
      return NS_VK_F6;
    case AKEYCODE_F7:
      return NS_VK_F7;
    case AKEYCODE_F8:
      return NS_VK_F8;
    case AKEYCODE_F9:
      return NS_VK_F9;
    case AKEYCODE_F10:
      return NS_VK_F10;
    case AKEYCODE_F11:
      return NS_VK_F11;
    case AKEYCODE_F12:
      return NS_VK_F12;
    case AKEYCODE_NUM_LOCK:
      return NS_VK_NUM_LOCK;
    case AKEYCODE_NUMPAD_0:
      return NS_VK_NUMPAD0;
    case AKEYCODE_NUMPAD_1:
      return NS_VK_NUMPAD1;
    case AKEYCODE_NUMPAD_2:
      return NS_VK_NUMPAD2;
    case AKEYCODE_NUMPAD_3:
      return NS_VK_NUMPAD3;
    case AKEYCODE_NUMPAD_4:
      return NS_VK_NUMPAD4;
    case AKEYCODE_NUMPAD_5:
      return NS_VK_NUMPAD5;
    case AKEYCODE_NUMPAD_6:
      return NS_VK_NUMPAD6;
    case AKEYCODE_NUMPAD_7:
      return NS_VK_NUMPAD7;
    case AKEYCODE_NUMPAD_8:
      return NS_VK_NUMPAD8;
    case AKEYCODE_NUMPAD_9:
      return NS_VK_NUMPAD9;
    case AKEYCODE_NUMPAD_DIVIDE:
      return NS_VK_DIVIDE;
    case AKEYCODE_NUMPAD_MULTIPLY:
      return NS_VK_MULTIPLY;
    case AKEYCODE_NUMPAD_SUBTRACT:
      return NS_VK_SUBTRACT;
    case AKEYCODE_NUMPAD_ADD:
      return NS_VK_ADD;
    case AKEYCODE_NUMPAD_DOT:
      return NS_VK_DECIMAL;
    case AKEYCODE_NUMPAD_COMMA:
      return NS_VK_SEPARATOR;
    case AKEYCODE_NUMPAD_ENTER:
      return NS_VK_RETURN;
    case AKEYCODE_NUMPAD_EQUALS:
      return NS_VK_EQUALS;
    // KEYCODE_NUMPAD_LEFT_PAREN (162) ... KEYCODE_CALCULATOR (210)

    // Needs to confirm the behavior.  If the key switches the open state
    // of Japanese IME (or switches input character between Hiragana and
    // Roman numeric characters), then, it might be better to use
    // NS_VK_KANJI which is used for Alt+Zenkaku/Hankaku key on Windows.
    case AKEYCODE_ZENKAKU_HANKAKU:
      return 0;
    case AKEYCODE_EISU:
      return NS_VK_EISU;
    case AKEYCODE_MUHENKAN:
      return NS_VK_NONCONVERT;
    case AKEYCODE_HENKAN:
      return NS_VK_CONVERT;
    case AKEYCODE_KATAKANA_HIRAGANA:
      return 0;
    case AKEYCODE_YEN:
      return NS_VK_BACK_SLASH;  // Same as other platforms.
    case AKEYCODE_RO:
      return NS_VK_BACK_SLASH;  // Same as other platforms.
    case AKEYCODE_KANA:
      return NS_VK_KANA;
    case AKEYCODE_ASSIST:
      return NS_VK_HELP;

    // the A key is the action key for gamepad devices.
    case AKEYCODE_BUTTON_A:
      return NS_VK_RETURN;

    default:
      ALOG(
          "ConvertAndroidKeyCodeToDOMKeyCode: "
          "No DOM keycode for Android keycode %d",
          int(androidKeyCode));
      return 0;
  }
}

static KeyNameIndex ConvertAndroidKeyCodeToKeyNameIndex(
    int32_t keyCode, int32_t action, int32_t domPrintableKeyValue) {
  // Special-case alphanumeric keycodes because they are most common.
  if (keyCode >= AKEYCODE_A && keyCode <= AKEYCODE_Z) {
    return KEY_NAME_INDEX_USE_STRING;
  }

  if (keyCode >= AKEYCODE_0 && keyCode <= AKEYCODE_9) {
    return KEY_NAME_INDEX_USE_STRING;
  }

  switch (keyCode) {
#define NS_NATIVE_KEY_TO_DOM_KEY_NAME_INDEX(aNativeKey, aKeyNameIndex) \
  case aNativeKey:                                                     \
    return aKeyNameIndex;

#include "NativeKeyToDOMKeyName.h"

#undef NS_NATIVE_KEY_TO_DOM_KEY_NAME_INDEX

    // KEYCODE_0 (7) ... KEYCODE_9 (16)
    case AKEYCODE_STAR:   // '*' key
    case AKEYCODE_POUND:  // '#' key

      // KEYCODE_A (29) ... KEYCODE_Z (54)

    case AKEYCODE_COMMA:   // ',' key
    case AKEYCODE_PERIOD:  // '.' key
    case AKEYCODE_SPACE:
    case AKEYCODE_GRAVE:          // '`' key
    case AKEYCODE_MINUS:          // '-' key
    case AKEYCODE_EQUALS:         // '=' key
    case AKEYCODE_LEFT_BRACKET:   // '[' key
    case AKEYCODE_RIGHT_BRACKET:  // ']' key
    case AKEYCODE_BACKSLASH:      // '\' key
    case AKEYCODE_SEMICOLON:      // ';' key
    case AKEYCODE_APOSTROPHE:     // ''' key
    case AKEYCODE_SLASH:          // '/' key
    case AKEYCODE_AT:             // '@' key
    case AKEYCODE_PLUS:           // '+' key

    case AKEYCODE_NUMPAD_0:
    case AKEYCODE_NUMPAD_1:
    case AKEYCODE_NUMPAD_2:
    case AKEYCODE_NUMPAD_3:
    case AKEYCODE_NUMPAD_4:
    case AKEYCODE_NUMPAD_5:
    case AKEYCODE_NUMPAD_6:
    case AKEYCODE_NUMPAD_7:
    case AKEYCODE_NUMPAD_8:
    case AKEYCODE_NUMPAD_9:
    case AKEYCODE_NUMPAD_DIVIDE:
    case AKEYCODE_NUMPAD_MULTIPLY:
    case AKEYCODE_NUMPAD_SUBTRACT:
    case AKEYCODE_NUMPAD_ADD:
    case AKEYCODE_NUMPAD_DOT:
    case AKEYCODE_NUMPAD_COMMA:
    case AKEYCODE_NUMPAD_EQUALS:
    case AKEYCODE_NUMPAD_LEFT_PAREN:
    case AKEYCODE_NUMPAD_RIGHT_PAREN:

    case AKEYCODE_YEN:  // yen sign key
    case AKEYCODE_RO:   // Japanese Ro key
      return KEY_NAME_INDEX_USE_STRING;

    case AKEYCODE_NUM:  // XXX Not sure
    case AKEYCODE_PICTSYMBOLS:

    case AKEYCODE_BUTTON_A:
    case AKEYCODE_BUTTON_B:
    case AKEYCODE_BUTTON_C:
    case AKEYCODE_BUTTON_X:
    case AKEYCODE_BUTTON_Y:
    case AKEYCODE_BUTTON_Z:
    case AKEYCODE_BUTTON_L1:
    case AKEYCODE_BUTTON_R1:
    case AKEYCODE_BUTTON_L2:
    case AKEYCODE_BUTTON_R2:
    case AKEYCODE_BUTTON_THUMBL:
    case AKEYCODE_BUTTON_THUMBR:
    case AKEYCODE_BUTTON_START:
    case AKEYCODE_BUTTON_SELECT:
    case AKEYCODE_BUTTON_MODE:

    case AKEYCODE_MEDIA_CLOSE:

    case AKEYCODE_BUTTON_1:
    case AKEYCODE_BUTTON_2:
    case AKEYCODE_BUTTON_3:
    case AKEYCODE_BUTTON_4:
    case AKEYCODE_BUTTON_5:
    case AKEYCODE_BUTTON_6:
    case AKEYCODE_BUTTON_7:
    case AKEYCODE_BUTTON_8:
    case AKEYCODE_BUTTON_9:
    case AKEYCODE_BUTTON_10:
    case AKEYCODE_BUTTON_11:
    case AKEYCODE_BUTTON_12:
    case AKEYCODE_BUTTON_13:
    case AKEYCODE_BUTTON_14:
    case AKEYCODE_BUTTON_15:
    case AKEYCODE_BUTTON_16:
      return KEY_NAME_INDEX_Unidentified;

    case AKEYCODE_UNKNOWN:
      MOZ_ASSERT(action != AKEY_EVENT_ACTION_MULTIPLE,
                 "Don't call this when action is AKEY_EVENT_ACTION_MULTIPLE!");
      // It's actually an unknown key if the action isn't ACTION_MULTIPLE.
      // However, it might cause text input.  So, let's check the value.
      return domPrintableKeyValue ? KEY_NAME_INDEX_USE_STRING
                                  : KEY_NAME_INDEX_Unidentified;

    default:
      ALOG(
          "ConvertAndroidKeyCodeToKeyNameIndex: "
          "No DOM key name index for Android keycode %d",
          keyCode);
      return KEY_NAME_INDEX_Unidentified;
  }
}

static CodeNameIndex ConvertAndroidScanCodeToCodeNameIndex(int32_t scanCode) {
  switch (scanCode) {
#define NS_NATIVE_KEY_TO_DOM_CODE_NAME_INDEX(aNativeKey, aCodeNameIndex) \
  case aNativeKey:                                                       \
    return aCodeNameIndex;

#include "NativeKeyToDOMCodeName.h"

#undef NS_NATIVE_KEY_TO_DOM_CODE_NAME_INDEX

    default:
      return CODE_NAME_INDEX_UNKNOWN;
  }
}

static void InitKeyEvent(WidgetKeyboardEvent& aEvent, int32_t aAction,
                         int32_t aKeyCode, int32_t aScanCode,
                         int32_t aMetaState, int64_t aTime,
                         int32_t aDomPrintableKeyValue, int32_t aRepeatCount,
                         int32_t aFlags) {
  const uint32_t domKeyCode = ConvertAndroidKeyCodeToDOMKeyCode(aKeyCode);

  aEvent.mModifiers = nsWindow::GetModifiers(aMetaState);
  aEvent.mKeyCode = domKeyCode;

  aEvent.mIsRepeat =
      (aEvent.mMessage == eKeyDown || aEvent.mMessage == eKeyPress) &&
      ((aFlags & java::sdk::KeyEvent::FLAG_LONG_PRESS) || aRepeatCount);

  aEvent.mKeyNameIndex = ConvertAndroidKeyCodeToKeyNameIndex(
      aKeyCode, aAction, aDomPrintableKeyValue);
  aEvent.mCodeNameIndex = ConvertAndroidScanCodeToCodeNameIndex(aScanCode);

  if (aEvent.mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
      aDomPrintableKeyValue) {
    aEvent.mKeyValue = char16_t(aDomPrintableKeyValue);
  }

  aEvent.mLocation =
      WidgetKeyboardEvent::ComputeLocationFromCodeValue(aEvent.mCodeNameIndex);
  aEvent.mTimeStamp = nsWindow::GetEventTimeStamp(aTime);
}

static nscolor ConvertAndroidColor(uint32_t aArgb) {
  return NS_RGBA((aArgb & 0x00ff0000) >> 16, (aArgb & 0x0000ff00) >> 8,
                 (aArgb & 0x000000ff), (aArgb & 0xff000000) >> 24);
}

static jni::ObjectArray::LocalRef ConvertRectArrayToJavaRectFArray(
    const nsTArray<LayoutDeviceIntRect>& aRects) {
  const size_t length = aRects.Length();
  auto rects = jni::ObjectArray::New<java::sdk::RectF>(length);

  for (size_t i = 0; i < length; i++) {
    const LayoutDeviceIntRect& tmp = aRects[i];

    auto rect = java::sdk::RectF::New(tmp.x, tmp.y, tmp.XMost(), tmp.YMost());
    rects->SetElement(i, rect);
  }
  return rects;
}

namespace mozilla {
namespace widget {

NS_IMPL_ISUPPORTS(GeckoEditableSupport, TextEventDispatcherListener,
                  nsISupportsWeakReference)

// This is the blocker helper class whether disposing GeckoEditableChild now.
// During JNI call from GeckoEditableChild, we shouldn't dispose it.
class MOZ_RAII AutoGeckoEditableBlocker final {
public:
  explicit AutoGeckoEditableBlocker(GeckoEditableSupport* aGeckoEditableSupport)
      : mGeckoEditable(aGeckoEditableSupport) {
    mGeckoEditable->AddBlocker();
  }
  ~AutoGeckoEditableBlocker() { mGeckoEditable->ReleaseBlocker(); }

private:
  RefPtr<GeckoEditableSupport> mGeckoEditable;
};

RefPtr<TextComposition> GeckoEditableSupport::GetComposition() const {
  nsCOMPtr<nsIWidget> widget = GetWidget();
  return widget ? IMEStateManager::GetTextCompositionFor(widget) : nullptr;
}

bool GeckoEditableSupport::RemoveComposition(RemoveCompositionFlag aFlag) {
  if (!mDispatcher || !mDispatcher->IsComposing()) {
    return false;
  }

  nsEventStatus status = nsEventStatus_eIgnore;

  NS_ENSURE_SUCCESS(BeginInputTransaction(mDispatcher), false);
  mDispatcher->CommitComposition(
      status, aFlag == CANCEL_IME_COMPOSITION ? &EmptyString() : nullptr);
  return true;
}

void GeckoEditableSupport::OnKeyEvent(int32_t aAction, int32_t aKeyCode,
                                      int32_t aScanCode, int32_t aMetaState,
                                      int32_t aKeyPressMetaState, int64_t aTime,
                                      int32_t aDomPrintableKeyValue,
                                      int32_t aRepeatCount, int32_t aFlags,
                                      bool aIsSynthesizedImeKey,
                                      jni::Object::Param aOriginalEvent) {
  AutoGeckoEditableBlocker blocker(this);

  nsCOMPtr<nsIWidget> widget = GetWidget();
  RefPtr<TextEventDispatcher> dispatcher =
      mDispatcher ? mDispatcher.get()
      : widget    ? widget->GetTextEventDispatcher()
                  : nullptr;
  NS_ENSURE_TRUE_VOID(dispatcher && widget);

  if (!aIsSynthesizedImeKey) {
    if (nsWindow* window = GetNsWindow()) {
      window->UserActivity();
    }
  } else if (aIsSynthesizedImeKey && mIMEMaskEventsCount > 0) {
    // Don't synthesize editor keys when not focused.
    return;
  }

  EventMessage msg;
  if (aAction == java::sdk::KeyEvent::ACTION_DOWN) {
    msg = eKeyDown;
  } else if (aAction == java::sdk::KeyEvent::ACTION_UP) {
    msg = eKeyUp;
  } else if (aAction == java::sdk::KeyEvent::ACTION_MULTIPLE) {
    // Keys with multiple action are handled in Java,
    // and we should never see one here
    MOZ_CRASH("Cannot handle key with multiple action");
  } else {
    NS_WARNING("Unknown key action event");
    return;
  }

  nsEventStatus status = nsEventStatus_eIgnore;
  WidgetKeyboardEvent event(true, msg, widget);
  InitKeyEvent(event, aAction, aKeyCode, aScanCode, aMetaState, aTime,
               aDomPrintableKeyValue, aRepeatCount, aFlags);

  if (nsIWidget::UsePuppetWidgets()) {
    // Don't use native key bindings.
    event.PreventNativeKeyBindings();
  }

  if (aIsSynthesizedImeKey) {
    // Keys synthesized by Java IME code are saved in the mIMEKeyEvents
    // array until the next IME_REPLACE_TEXT event, at which point
    // these keys are dispatched in sequence.
    mIMEKeyEvents.AppendElement(UniquePtr<WidgetEvent>(event.Duplicate()));
  } else {
    NS_ENSURE_SUCCESS_VOID(BeginInputTransaction(dispatcher));
    dispatcher->DispatchKeyboardEvent(msg, event, status);
    if (widget->Destroyed() || status == nsEventStatus_eConsumeNoDefault) {
      // Skip default processing.
      return;
    }
    mEditable->OnDefaultKeyEvent(aOriginalEvent);
  }

  // Only send keypress after keydown.
  if (msg != eKeyDown) {
    return;
  }

  WidgetKeyboardEvent pressEvent(true, eKeyPress, widget);
  InitKeyEvent(pressEvent, aAction, aKeyCode, aScanCode, aKeyPressMetaState,
               aTime, aDomPrintableKeyValue, aRepeatCount, aFlags);

  if (nsIWidget::UsePuppetWidgets()) {
    // Don't use native key bindings.
    pressEvent.PreventNativeKeyBindings();
  }

  if (aIsSynthesizedImeKey) {
    mIMEKeyEvents.AppendElement(UniquePtr<WidgetEvent>(pressEvent.Duplicate()));
  } else {
    dispatcher->MaybeDispatchKeypressEvents(pressEvent, status);
  }
}

/*
* Send dummy key events for pages that are unaware of input events,
* to provide web compatibility for pages that depend on key events.
*/
void GeckoEditableSupport::SendIMEDummyKeyEvent(nsIWidget* aWidget,
                                                EventMessage msg) {
  AutoGeckoEditableBlocker blocker(this);

  nsEventStatus status = nsEventStatus_eIgnore;
  MOZ_ASSERT(mDispatcher);

  WidgetKeyboardEvent event(true, msg, aWidget);
  // TODO: If we can know scan code of the key event which caused replacing
  //       composition string, we should set mCodeNameIndex here.  Then,
  //       we should rename this method because it becomes not a "dummy"
  //       keyboard event.
  event.mKeyCode = NS_VK_PROCESSKEY;
  event.mKeyNameIndex = KEY_NAME_INDEX_Process;
  // KeyboardEvents marked as "processed by IME" shouldn't cause any edit
  // actions.  So, we should set their native key binding to none before
  // dispatch to avoid crash on PuppetWidget and avoid running redundant
  // path to look for native key bindings.
  if (nsIWidget::UsePuppetWidgets()) {
    event.PreventNativeKeyBindings();
  }
  NS_ENSURE_SUCCESS_VOID(BeginInputTransaction(mDispatcher));
  mDispatcher->DispatchKeyboardEvent(msg, event, status);
}

void GeckoEditableSupport::AddIMETextChange(
    const IMENotification::TextChangeDataBase& aChange) {
  mIMEPendingTextChange.MergeWith(aChange);

  // We may not be in the middle of flushing,
  // in which case this flag is meaningless.
  mIMETextChangedDuringFlush = true;
}

void GeckoEditableSupport::PostFlushIMEChanges() {
  if (mIMEPendingTextChange.IsValid() || mIMESelectionChanged) {
    // Already posted
    return;
  }

  RefPtr<GeckoEditableSupport> self(this);

  nsAppShell::PostEvent([this, self] {
    nsCOMPtr<nsIWidget> widget = GetWidget();
    if (widget && !widget->Destroyed()) {
      FlushIMEChanges();
    }
  });
}

void GeckoEditableSupport::FlushIMEChanges(FlushChangesFlag aFlags) {
  // Only send change notifications if we are *not* masking events,
  // i.e. if we have a focused editor,
  NS_ENSURE_TRUE_VOID(!mIMEMaskEventsCount);

  if (mIMEDelaySynchronizeReply && mIMEActiveCompositionCount > 0) {
    // We are still expecting more composition events to be handled. Once
    // that happens, FlushIMEChanges will be called again.
    return;
  }

  nsCOMPtr<nsIWidget> widget = GetWidget();
  NS_ENSURE_TRUE_VOID(widget);

  struct TextRecord {
    TextRecord() : start(-1), oldEnd(-1), newEnd(-1) {}

    bool IsValid() const { return start >= 0; }

    nsString text;
    int32_t start;
    int32_t oldEnd;
    int32_t newEnd;
  };
  TextRecord textTransaction;

  nsEventStatus status = nsEventStatus_eIgnore;
  bool causedOnlyByComposition = mIMEPendingTextChange.IsValid() &&
                                 mIMEPendingTextChange.mCausedOnlyByComposition;
  mIMETextChangedDuringFlush = false;

  auto shouldAbort = [=](bool aForce) -> bool {
    if (!aForce && !mIMETextChangedDuringFlush) {
      return false;
    }
    // A query event could have triggered more text changes to come in, as
    // indicated by our flag. If that happens, try flushing IME changes
    // again.
    if (aFlags == FLUSH_FLAG_NONE) {
      FlushIMEChanges(FLUSH_FLAG_RETRY);
    } else {
      // Don't retry if already retrying, to avoid infinite loops.
      __android_log_print(ANDROID_LOG_WARN, "GeckoEditableSupport",
                          "Already retrying IME flush");
    }
    return true;
  };

  if (mIMEPendingTextChange.IsValid() &&
      (mIMEPendingTextChange.mStartOffset !=
           mIMEPendingTextChange.mRemovedEndOffset ||
       mIMEPendingTextChange.mStartOffset !=
           mIMEPendingTextChange.mAddedEndOffset)) {
    WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
                                                  widget);

    if (mIMEPendingTextChange.mAddedEndOffset !=
        mIMEPendingTextChange.mStartOffset) {
      queryTextContentEvent.InitForQueryTextContent(
          mIMEPendingTextChange.mStartOffset,
          mIMEPendingTextChange.mAddedEndOffset -
              mIMEPendingTextChange.mStartOffset);
      widget->DispatchEvent(&queryTextContentEvent, status);

      if (shouldAbort(NS_WARN_IF(queryTextContentEvent.Failed()))) {
        return;
      }

      textTransaction.text = queryTextContentEvent.mReply->DataRef();
    }

    textTransaction.start =
        static_cast<int32_t>(mIMEPendingTextChange.mStartOffset);
    textTransaction.oldEnd =
        static_cast<int32_t>(mIMEPendingTextChange.mRemovedEndOffset);
    textTransaction.newEnd =
        static_cast<int32_t>(mIMEPendingTextChange.mAddedEndOffset);
  }

  int32_t selStart = -1;
  int32_t selEnd = -1;

  if (mIMESelectionChanged) {
    if (mCachedSelection.IsValid()) {
      selStart = mCachedSelection.mStartOffset;
      selEnd = mCachedSelection.mEndOffset;
    } else {
      // XXX Unfortunately we don't know current selection via selection
      //     change notification.
      //     eQuerySelectedText might be newer data than text change data.
      //     It means that GeckoEditableChild.onSelectionChange may throw
      //     IllegalArgumentException since we don't merge with newer text
      //     change.
      WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
                                                     widget);
      widget->DispatchEvent(&querySelectedTextEvent, status);

      if (shouldAbort(
              NS_WARN_IF(querySelectedTextEvent.DidNotFindSelection()))) {
        return;
      }

      selStart =
          static_cast<int32_t>(querySelectedTextEvent.mReply->AnchorOffset());
      selEnd =
          static_cast<int32_t>(querySelectedTextEvent.mReply->FocusOffset());
    }

    if (aFlags == FLUSH_FLAG_RECOVER && textTransaction.IsValid()) {
      // Sometimes we get out-of-bounds selection during recovery.
      // Limit the offsets so we don't crash.
      const int32_t end = textTransaction.start + textTransaction.text.Length();
      selStart = std::min(selStart, end);
      selEnd = std::min(selEnd, end);
    }
  }

  JNIEnv* const env = jni::GetGeckoThreadEnv();
  auto flushOnException = [=]() -> bool {
    if (!env->ExceptionCheck()) {
      return false;
    }
    if (aFlags != FLUSH_FLAG_RECOVER) {
      // First time seeing an exception; try flushing text.
      env->ExceptionClear();
      __android_log_print(ANDROID_LOG_WARN, "GeckoEditableSupport",
                          "Recovering from IME exception");
      FlushIMEText(FLUSH_FLAG_RECOVER);
    } else {
      // Give up because we've already tried.
#ifdef RELEASE_OR_BETA
      env->ExceptionClear();
#else
      MOZ_CATCH_JNI_EXCEPTION(env);
#endif
    }
    return true;
  };

  // Commit the text change and selection change transaction.
  mIMEPendingTextChange.Clear();

  if (textTransaction.IsValid()) {
    mEditable->OnTextChange(textTransaction.text, textTransaction.start,
                            textTransaction.oldEnd, textTransaction.newEnd,
                            causedOnlyByComposition);
    if (flushOnException()) {
      return;
    }
  }

  while (mIMEDelaySynchronizeReply && mIMEActiveSynchronizeCount) {
    mIMEActiveSynchronizeCount--;
    mEditable->NotifyIME(EditableListener::NOTIFY_IME_REPLY_EVENT);
  }
  mIMEDelaySynchronizeReply = false;
  mIMEActiveSynchronizeCount = 0;
  mIMEActiveCompositionCount = 0;

  if (mIMESelectionChanged) {
    mIMESelectionChanged = false;
    if (mDispatcher) {
      // mCausedOnlyByComposition may be true on committing text.
      // So even if true, there is no composition.
      causedOnlyByComposition &= mDispatcher->IsComposing();
    }
    mEditable->OnSelectionChange(selStart, selEnd, causedOnlyByComposition);
    flushOnException();
  }
}

void GeckoEditableSupport::FlushIMEText(FlushChangesFlag aFlags) {
  NS_WARNING_ASSERTION(
      !mIMEDelaySynchronizeReply || !mIMEActiveCompositionCount,
      "Cannot synchronize Java text with Gecko text");

  // Notify Java of the newly focused content
  mIMEPendingTextChange.Clear();
  mIMESelectionChanged = true;

  // Use 'INT32_MAX / 2' here because subsequent text changes might combine
  // with this text change, and overflow might occur if we just use
  // INT32_MAX.
  IMENotification notification(NOTIFY_IME_OF_TEXT_CHANGE);
  notification.mTextChangeData.mStartOffset = 0;
  notification.mTextChangeData.mRemovedEndOffset = INT32_MAX / 2;
  notification.mTextChangeData.mAddedEndOffset = INT32_MAX / 2;
  NotifyIME(mDispatcher, notification);

  FlushIMEChanges(aFlags);
}

void GeckoEditableSupport::UpdateCompositionRects() {
  nsCOMPtr<nsIWidget> widget = GetWidget();
  RefPtr<TextComposition> composition(GetComposition());
  NS_ENSURE_TRUE_VOID(mDispatcher && widget);

  jni::ObjectArray::LocalRef rects;
  if (composition) {
    nsEventStatus status = nsEventStatus_eIgnore;
    uint32_t offset = composition->NativeOffsetOfStartComposition();
    WidgetQueryContentEvent queryTextRectsEvent(true, eQueryTextRectArray,
                                                widget);
    queryTextRectsEvent.InitForQueryTextRectArray(
        offset, composition->String().Length());
    widget->DispatchEvent(&queryTextRectsEvent, status);
    rects = ConvertRectArrayToJavaRectFArray(
        queryTextRectsEvent.Succeeded()
            ? queryTextRectsEvent.mReply->mRectArray
            : CopyableTArray<mozilla::LayoutDeviceIntRect>());
  } else {
    rects = ConvertRectArrayToJavaRectFArray(
        CopyableTArray<mozilla::LayoutDeviceIntRect>());
  }

  WidgetQueryContentEvent queryCaretRectEvent(true, eQueryCaretRect, widget);
  WidgetQueryContentEvent::Options options;
  options.mRelativeToInsertionPoint = true;
  queryCaretRectEvent.InitForQueryCaretRect(0, options);

  nsEventStatus status = nsEventStatus_eIgnore;
  widget->DispatchEvent(&queryCaretRectEvent, status);
  auto caretRect =
      queryCaretRectEvent.Succeeded()
          ? java::sdk::RectF::New(queryCaretRectEvent.mReply->mRect.x,
                                  queryCaretRectEvent.mReply->mRect.y,
                                  queryCaretRectEvent.mReply->mRect.XMost(),
                                  queryCaretRectEvent.mReply->mRect.YMost())
          : java::sdk::RectF::New();

  mEditable->UpdateCompositionRects(rects, caretRect);
}

void GeckoEditableSupport::OnImeSynchronize() {
  AutoGeckoEditableBlocker blocker(this);

  if (mIMEDelaySynchronizeReply) {
    // If we are waiting for other events to reply,
    // queue this reply as well.
    mIMEActiveSynchronizeCount++;
    return;
  }
  if (!mIMEMaskEventsCount) {
    FlushIMEChanges();
  }
  mEditable->NotifyIME(EditableListener::NOTIFY_IME_REPLY_EVENT);
}

void GeckoEditableSupport::OnImeReplaceText(int32_t aStart, int32_t aEnd,
                                            jni::String::Param aText) {
  AutoGeckoEditableBlocker blocker(this);

  if (DoReplaceText(aStart, aEnd, aText)) {
    mIMEDelaySynchronizeReply = true;
  }

  OnImeSynchronize();
}

bool GeckoEditableSupport::DoReplaceText(int32_t aStart, int32_t aEnd,
                                         jni::String::Param aText) {
  ALOGIME(
      "IME: IME_REPLACE_TEXT: aStart=%d, aEnd=%d, aText=\"%s\", "
      "mIMERanges=%zu, mIMEKeyEvents=%zu",
      aStart, aEnd, NS_ConvertUTF16toUTF8(aText->ToString()).get(),
      mIMERanges->Length(), mIMEKeyEvents.Length());

  // Return true if processed and we should reply to the OnImeReplaceText
  // event later. Return false if _not_ processed and we should reply to the
  // OnImeReplaceText event now.

  if (mIMEMaskEventsCount > 0) {
    // Not focused; still reply to events, but don't do anything else.
    return false;
  }

  if (nsWindow* window = GetNsWindow()) {
    window->UserActivity();
  }

  /*
      Replace text in Gecko thread from aStart to aEnd with the string text.
  */
  nsCOMPtr<nsIWidget> widget = GetWidget();
  NS_ENSURE_TRUE(mDispatcher && widget, false);
  NS_ENSURE_SUCCESS(BeginInputTransaction(mDispatcher), false);

  RefPtr<TextComposition> composition(GetComposition());
  MOZ_ASSERT(!composition || !composition->EditorIsHandlingLatestChange());

  nsString string(aText->ToString());
  const bool composing = !mIMERanges->IsEmpty();
  nsEventStatus status = nsEventStatus_eIgnore;
  bool textChanged = composing;
  // Whether deleting content before setting or committing composition text.
  bool performDeletion = false;
  // Dispatch composition start to set current composition.
  bool needDispatchCompositionStart = false;

  if (!mIMEKeyEvents.IsEmpty() || !composition || !mDispatcher->IsComposing() ||
      uint32_t(aStart) != composition->NativeOffsetOfStartComposition() ||
      uint32_t(aEnd) != composition->NativeOffsetOfStartComposition() +
                            composition->String().Length()) {
    // Only start a new composition if we have key events,
    // if we don't have an existing composition, or
    // the replaced text does not match our composition.
    textChanged |= RemoveComposition();

#ifdef NIGHTLY_BUILD
    {
      nsEventStatus status = nsEventStatus_eIgnore;
      WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
                                                     widget);
      widget->DispatchEvent(&querySelectedTextEvent, status);
      if (querySelectedTextEvent.Succeeded()) {
        ALOGIME(
            "IME: Current selection: %s",
            ToString(querySelectedTextEvent.mReply->mOffsetAndData).c_str());
      }
    }
#endif

    // If aStart or aEnd is negative value, we use current selection instead
    // of updating the selection.
    if (aStart >= 0 && aEnd >= 0) {
      // Use text selection to set target position(s) for
      // insert, or replace, of text.
      WidgetSelectionEvent event(true, eSetSelection, widget);
      event.mOffset = uint32_t(aStart);
      event.mLength = uint32_t(aEnd - aStart);
      event.mExpandToClusterBoundary = false;
      event.mReason = nsISelectionListener::IME_REASON;
      widget->DispatchEvent(&event, status);
    }

    if (!mIMEKeyEvents.IsEmpty()) {
      bool ignoreNextKeyPress = false;
      for (uint32_t i = 0; i < mIMEKeyEvents.Length(); i++) {
        const auto event = mIMEKeyEvents[i]->AsKeyboardEvent();
        // widget for duplicated events is initially nullptr.
        event->mWidget = widget;

        status = nsEventStatus_eIgnore;
        if (event->mMessage != eKeyPress) {
          mDispatcher->DispatchKeyboardEvent(event->mMessage, *event, status);
          // Skip default processing. It means that next key press shouldn't
          // be dispatched.
          ignoreNextKeyPress = event->mMessage == eKeyDown &&
                               status == nsEventStatus_eConsumeNoDefault;
        } else {
          if (ignoreNextKeyPress) {
            // Don't dispatch key press since previous key down is consumed.
            ignoreNextKeyPress = false;
            continue;
          }
          mDispatcher->MaybeDispatchKeypressEvents(*event, status);
          if (status == nsEventStatus_eConsumeNoDefault) {
            textChanged = true;
          }
        }
        if (!mDispatcher || widget->Destroyed()) {
          // Don't wait for any text change event.
          textChanged = false;
          break;
        }
      }
      mIMEKeyEvents.Clear();
      return textChanged;
    }

    if (aStart != aEnd) {
      if (composing) {
        // Actually Gecko doesn't start composition, so it is unnecessary to
        // delete content before setting composition string.
        needDispatchCompositionStart = true;
      } else {
        // Perform a deletion first.
        performDeletion = true;
      }
    }
  } else if (composition->String().Equals(string)) {
    // If the new text is the same as the existing composition text,
    // the NS_COMPOSITION_CHANGE event does not generate a text
    // change notification. However, the Java side still expects
    // one, so we manually generate a notification.
    //
    // Also, since this is IME change, we have to set mCausedOnlyByComposition.
    IMENotification::TextChangeData dummyChange(aStart, aEnd, aEnd, true,
                                                false);
    PostFlushIMEChanges();
    mIMESelectionChanged = true;
    AddIMETextChange(dummyChange);
    textChanged = true;
  }

  SendIMEDummyKeyEvent(widget, eKeyDown);
  if (!mDispatcher || widget->Destroyed()) {
    return false;
  }

  if (!StaticPrefs::intl_ime_use_composition_events_for_insert_text() &&
      !composing && !mDispatcher->IsComposing() && aStart == aEnd &&
      !string.IsEmpty()) {
    // We don't start composition yet and inserting text has no composition.
    // So we can simply insert text without composition.
    ALOGIME("IME: Don't use composition event to insert text");
    WidgetContentCommandEvent insertTextEvent(true, eContentCommandInsertText,
                                              widget);
    insertTextEvent.mString = Some(string);
    widget->DispatchEvent(&insertTextEvent, status);
    if (!mDispatcher || widget->Destroyed()) {
      return false;
    }
    SendIMEDummyKeyEvent(widget, eKeyUp);
    return true;
  }

  if (needDispatchCompositionStart) {
    // StartComposition sets composition string from selected string.
    nsEventStatus status = nsEventStatus_eIgnore;
    mDispatcher->StartComposition(status);
    if (!mDispatcher || widget->Destroyed()) {
      return false;
    }
  } else if (performDeletion) {
    WidgetContentCommandEvent event(true, eContentCommandDelete, widget);
    widget->DispatchEvent(&event, status);
    if (!mDispatcher || widget->Destroyed()) {
      return false;
    }
    textChanged = true;
  }

  if (composing) {
    mDispatcher->SetPendingComposition(string, mIMERanges);
    mDispatcher->FlushPendingComposition(status);
    mIMEActiveCompositionCount++;
    // Ensure IME ranges are empty.
    mIMERanges->Clear();
  } else if (!string.IsEmpty() || mDispatcher->IsComposing()) {
    mDispatcher->CommitComposition(status, &string);
    mIMEActiveCompositionCount++;
    textChanged = true;
  }
  if (!mDispatcher || widget->Destroyed()) {
    return false;
  }

  SendIMEDummyKeyEvent(widget, eKeyUp);
  // Widget may be destroyed after dispatching the above event.

  return textChanged;
}

void GeckoEditableSupport::OnImeAddCompositionRange(
    int32_t aStart, int32_t aEnd, int32_t aRangeType, int32_t aRangeStyle,
    int32_t aRangeLineStyle, bool aRangeBoldLine, int32_t aRangeForeColor,
    int32_t aRangeBackColor, int32_t aRangeLineColor) {
  AutoGeckoEditableBlocker blocker(this);

  if (mIMEMaskEventsCount > 0) {
    // Not focused.
    return;
  }

  TextRange range;
  range.mStartOffset = aStart;
  range.mEndOffset = aEnd;
  range.mRangeType = ToTextRangeType(aRangeType);
  range.mRangeStyle.mDefinedStyles = aRangeStyle;
  range.mRangeStyle.mLineStyle = TextRangeStyle::ToLineStyle(aRangeLineStyle);
  range.mRangeStyle.mIsBoldLine = aRangeBoldLine;
  range.mRangeStyle.mForegroundColor =
      ConvertAndroidColor(uint32_t(aRangeForeColor));
  range.mRangeStyle.mBackgroundColor =
      ConvertAndroidColor(uint32_t(aRangeBackColor));
  range.mRangeStyle.mUnderlineColor =
      ConvertAndroidColor(uint32_t(aRangeLineColor));
  mIMERanges->AppendElement(range);
}

void GeckoEditableSupport::OnImeUpdateComposition(int32_t aStart, int32_t aEnd,
                                                  int32_t aFlags) {
  AutoGeckoEditableBlocker blocker(this);

  if (DoUpdateComposition(aStart, aEnd, aFlags)) {
    mIMEDelaySynchronizeReply = true;
  }
}

bool GeckoEditableSupport::DoUpdateComposition(int32_t aStart, int32_t aEnd,
                                               int32_t aFlags) {
  if (mIMEMaskEventsCount > 0) {
    // Not focused.
    return false;
  }

  nsCOMPtr<nsIWidget> widget = GetWidget();
  nsEventStatus status = nsEventStatus_eIgnore;
  NS_ENSURE_TRUE(mDispatcher && widget, false);

  const bool keepCurrent =
      !!(aFlags & java::GeckoEditableChild::FLAG_KEEP_CURRENT_COMPOSITION);

  // A composition with no ranges means we want to set the selection.
  if (mIMERanges->IsEmpty()) {
    if (keepCurrent && mDispatcher->IsComposing()) {
      // Don't set selection if we want to keep current composition.
      return false;
    }

    MOZ_ASSERT(aStart >= 0 && aEnd >= 0);
    const bool compositionChanged = RemoveComposition();

    WidgetSelectionEvent selEvent(true, eSetSelection, widget);
    selEvent.mOffset = std::min(aStart, aEnd);
    selEvent.mLength = std::max(aStart, aEnd) - selEvent.mOffset;
    selEvent.mReversed = aStart > aEnd;
    selEvent.mExpandToClusterBoundary = false;
    widget->DispatchEvent(&selEvent, status);
    return compositionChanged;
  }

  /**
   * Update the composition from aStart to aEnd using information from added
   * ranges. This is only used for visual indication and does not affect the
   * text content.  Only the offsets are specified and not the text content
   * to eliminate the possibility of this event altering the text content
   * unintentionally.
   */
  nsString string;
  RefPtr<TextComposition> composition(GetComposition());
  MOZ_ASSERT(!composition || !composition->EditorIsHandlingLatestChange());

  if (!composition || !mDispatcher->IsComposing() ||
      uint32_t(aStart) != composition->NativeOffsetOfStartComposition() ||
      uint32_t(aEnd) != composition->NativeOffsetOfStartComposition() +
                            composition->String().Length()) {
    if (keepCurrent) {
      // Don't start a new composition if we want to keep the current one.
      mIMERanges->Clear();
      return false;
    }

    // Only start new composition if we don't have an existing one,
    // or if the existing composition doesn't match the new one.
    RemoveComposition();

    {
      WidgetSelectionEvent event(true, eSetSelection, widget);
      event.mOffset = uint32_t(aStart);
      event.mLength = uint32_t(aEnd - aStart);
      event.mExpandToClusterBoundary = false;
      event.mReason = nsISelectionListener::IME_REASON;
      widget->DispatchEvent(&event, status);
    }

    {
      WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
                                                     widget);
      widget->DispatchEvent(&querySelectedTextEvent, status);
      MOZ_ASSERT(querySelectedTextEvent.Succeeded());
      if (querySelectedTextEvent.FoundSelection()) {
        string = querySelectedTextEvent.mReply->DataRef();
      }
    }
  } else {
    // If the new composition matches the existing composition,
    // reuse the old composition.
    string = composition->String();
  }

  ALOGIME("IME: IME_SET_TEXT: text=\"%s\", length=%zu, range=%zu",
          NS_ConvertUTF16toUTF8(string).get(), string.Length(),
          mIMERanges->Length());

  if (NS_WARN_IF(NS_FAILED(BeginInputTransaction(mDispatcher)))) {
    mIMERanges->Clear();
    return false;
  }
  mDispatcher->SetPendingComposition(string, mIMERanges);
  mDispatcher->FlushPendingComposition(status);
  mIMEActiveCompositionCount++;
  mIMERanges->Clear();
  return true;
}

void GeckoEditableSupport::OnImeRequestCursorUpdates(int aRequestMode) {
  AutoGeckoEditableBlocker blocker(this);

  if (aRequestMode == EditableClient::ONE_SHOT) {
    UpdateCompositionRects();
    return;
  }

  mIMEMonitorCursor = (aRequestMode == EditableClient::START_MONITOR);
}

class MOZ_STACK_CLASS AutoSelectionRestore final {
public:
  explicit AutoSelectionRestore(nsIWidget* widget,
                                TextEventDispatcher* dispatcher)
      : mWidget(widget), mDispatcher(dispatcher) {
    MOZ_ASSERT(widget);
    if (!dispatcher || !dispatcher->IsComposing()) {
      mOffset = UINT32_MAX;
      mLength = UINT32_MAX;
      return;
    }
    WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
                                                   widget);
    nsEventStatus status = nsEventStatus_eIgnore;
    widget->DispatchEvent(&querySelectedTextEvent, status);
    if (querySelectedTextEvent.DidNotFindSelection()) {
      mOffset = UINT32_MAX;
      mLength = UINT32_MAX;
      return;
    }

    mOffset = querySelectedTextEvent.mReply->StartOffset();
    mLength = querySelectedTextEvent.mReply->DataLength();
  }

  ~AutoSelectionRestore() {
    if (mWidget->Destroyed() || mOffset == UINT32_MAX) {
      return;
    }

    WidgetSelectionEvent selection(true, eSetSelection, mWidget);
    selection.mOffset = mOffset;
    selection.mLength = mLength;
    selection.mExpandToClusterBoundary = false;
    selection.mReason = nsISelectionListener::IME_REASON;
    nsEventStatus status = nsEventStatus_eIgnore;
    mWidget->DispatchEvent(&selection, status);
  }

private:
  nsCOMPtr<nsIWidget> mWidget;
  RefPtr<TextEventDispatcher> mDispatcher;
  uint32_t mOffset;
  uint32_t mLength;
};

void GeckoEditableSupport::OnImeRequestCommit() {
  AutoGeckoEditableBlocker blocker(this);

  if (mIMEMaskEventsCount > 0) {
    // Not focused.
    return;
  }

  nsCOMPtr<nsIWidget> widget = GetWidget();
  if (NS_WARN_IF(!widget)) {
    return;
  }

  AutoSelectionRestore restore(widget, mDispatcher);

  RemoveComposition(COMMIT_IME_COMPOSITION);
}

void GeckoEditableSupport::AsyncNotifyIME(int32_t aNotification) {
  RefPtr<GeckoEditableSupport> self(this);

  nsAppShell::PostEvent([this, self, aNotification] {
    if (!mIMEMaskEventsCount) {
      mEditable->NotifyIME(aNotification);
    }
  });
}

nsresult GeckoEditableSupport::NotifyIME(
    TextEventDispatcher* aTextEventDispatcher,
    const IMENotification& aNotification) {
  MOZ_ASSERT(mEditable);

  switch (aNotification.mMessage) {
    case REQUEST_TO_COMMIT_COMPOSITION: {
      ALOGIME("IME: REQUEST_TO_COMMIT_COMPOSITION");

      RemoveComposition(COMMIT_IME_COMPOSITION);
      AsyncNotifyIME(EditableListener::NOTIFY_IME_TO_COMMIT_COMPOSITION);
      break;
    }

    case REQUEST_TO_CANCEL_COMPOSITION: {
      ALOGIME("IME: REQUEST_TO_CANCEL_COMPOSITION");

      RemoveComposition(CANCEL_IME_COMPOSITION);
      AsyncNotifyIME(EditableListener::NOTIFY_IME_TO_CANCEL_COMPOSITION);
      break;
    }

    case NOTIFY_IME_OF_FOCUS: {
      ALOGIME("IME: NOTIFY_IME_OF_FOCUS");

      mIMEFocusCount++;

      RefPtr<GeckoEditableSupport> self(this);
      RefPtr<TextEventDispatcher> dispatcher = aTextEventDispatcher;

      // Post an event because we have to flush the text before sending a
      // focus event, and we may not be able to flush text during the
      // NotifyIME call.
      nsAppShell::PostEvent([this, self, dispatcher] {
        nsCOMPtr<nsIWidget> widget = dispatcher->GetWidget();

        --mIMEMaskEventsCount;
        if (!mIMEFocusCount || !widget || widget->Destroyed()) {
          return;
        }

        mEditable->NotifyIME(EditableListener::NOTIFY_IME_OF_TOKEN);

        if (mIsRemote) {
          if (!mEditableAttached) {
            // Re-attach on focus; see OnRemovedFrom().
            jni::NativeWeakPtrHolder<GeckoEditableSupport>::AttachExisting(
                mEditable, do_AddRef(this));
            mEditableAttached = true;
          }
          // Because GeckoEditableSupport in content process doesn't
          // manage the active input context, we need to retrieve the
          // input context from the widget, for use by
          // OnImeReplaceText.
          mInputContext = widget->GetInputContext();
        }
        mDispatcher = dispatcher;
        mIMEKeyEvents.Clear();

        mCachedSelection.Reset();

        mIMEDelaySynchronizeReply = false;
        mIMEActiveCompositionCount = 0;
        FlushIMEText();

        // IME will call requestCursorUpdates after getting context.
        // So reset cursor update mode before getting context.
        mIMEMonitorCursor = false;

        mEditable->NotifyIME(EditableListener::NOTIFY_IME_OF_FOCUS);
      });
      break;
    }

    case NOTIFY_IME_OF_BLUR: {
      ALOGIME("IME: NOTIFY_IME_OF_BLUR");

      mIMEFocusCount--;
      MOZ_ASSERT(mIMEFocusCount >= 0);

      RefPtr<GeckoEditableSupport> self(this);
      nsAppShell::PostEvent([this, self] {
        if (!mIMEFocusCount) {
          mIMEDelaySynchronizeReply = false;
          mIMEActiveSynchronizeCount = 0;
          mIMEActiveCompositionCount = 0;
          mInputContext.ShutDown();
          mEditable->NotifyIME(EditableListener::NOTIFY_IME_OF_BLUR);
          OnRemovedFrom(mDispatcher);
        }
      });

      // Mask events because we lost focus. Unmask on the next focus.
      mIMEMaskEventsCount++;
      break;
    }

    case NOTIFY_IME_OF_SELECTION_CHANGE: {
      ALOGIME("IME: NOTIFY_IME_OF_SELECTION_CHANGE: SelectionChangeData=%s",
              ToString(aNotification.mSelectionChangeData).c_str());

      if (aNotification.mSelectionChangeData.HasRange()) {
        mCachedSelection.mStartOffset = static_cast<int32_t>(
            aNotification.mSelectionChangeData.AnchorOffset());
        mCachedSelection.mEndOffset = static_cast<int32_t>(
            aNotification.mSelectionChangeData.FocusOffset());
      } else {
        mCachedSelection.Reset();
      }

      PostFlushIMEChanges();
      mIMESelectionChanged = true;
      break;
    }

    case NOTIFY_IME_OF_TEXT_CHANGE: {
      ALOGIME("IME: NOTIFY_IME_OF_TEXT_CHANGE: TextChangeData=%s",
              ToString(aNotification.mTextChangeData).c_str());

      /* Make sure Java's selection is up-to-date */
      PostFlushIMEChanges();
      mIMESelectionChanged = true;
      AddIMETextChange(aNotification.mTextChangeData);
      break;
    }

    case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED: {
      ALOGIME("IME: NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED");

      // NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED isn't sent per IME call.
      // Receiving this event means that Gecko has already handled all IME
      // composing events in queue.
      //
      if (mIsRemote) {
        OnNotifyIMEOfCompositionEventHandled();
      } else {
        // Also, when receiving this event, mIMEDelaySynchronizeReply won't
        // update yet on non-e10s case since IME event is posted before updating
        // it. So we have to delay handling of this event.
        RefPtr<GeckoEditableSupport> self(this);
        nsAppShell::PostEvent(
            [this, self] { OnNotifyIMEOfCompositionEventHandled(); });
      }
      break;
    }

    default:
      break;
  }
  return NS_OK;
}

void GeckoEditableSupport::OnNotifyIMEOfCompositionEventHandled() {
  // NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED may be merged with multiple events,
  // so reset count.
  mIMEActiveCompositionCount = 0;
  if (mIMEDelaySynchronizeReply) {
    FlushIMEChanges();
  }

  // Hardware keyboard support requires each string rect.
  if (mIMEMonitorCursor) {
    UpdateCompositionRects();
  }
}

void GeckoEditableSupport::OnRemovedFrom(
    TextEventDispatcher* aTextEventDispatcher) {
  mDispatcher = nullptr;

  if (mIsRemote && mEditable->HasEditableParent()) {
    // When we're remote, detach every time.
    OnWeakNonIntrusiveDetach(NS_NewRunnableFunction(
        "GeckoEditableSupport::OnRemovedFrom",
        [editable = java::GeckoEditableChild::GlobalRef(mEditable)] {
          DisposeNative(editable);
        }));
  }
}

void GeckoEditableSupport::WillDispatchKeyboardEvent(
    TextEventDispatcher* aTextEventDispatcher,
    WidgetKeyboardEvent& aKeyboardEvent, uint32_t aIndexOfKeypress,
    void* aData) {}

NS_IMETHODIMP_(IMENotificationRequests)
GeckoEditableSupport::GetIMENotificationRequests() {
  return IMENotificationRequests(IMENotificationRequests::NOTIFY_TEXT_CHANGE);
}

static bool ShouldKeyboardDismiss(const nsAString& aInputType,
                                  const nsAString& aInputMode) {
  // Some input type uses the prompt to input value. So it is unnecessary to
  // show software keyboard.
  return aInputMode.EqualsLiteral("none") || aInputType.EqualsLiteral("date") ||
         aInputType.EqualsLiteral("time") ||
         aInputType.EqualsLiteral("month") ||
         aInputType.EqualsLiteral("week") ||
         aInputType.EqualsLiteral("datetime-local");
}

void GeckoEditableSupport::SetInputContext(const InputContext& aContext,
                                           const InputContextAction& aAction) {
  // SetInputContext is called from chrome process only
  MOZ_ASSERT(XRE_IsParentProcess());
  MOZ_ASSERT(mEditable);

  ALOGIME(
      "IME: SetInputContext: aContext=%s, "
      "aAction={mCause=%s, mFocusChange=%s}",
      ToString(aContext).c_str(), ToString(aAction.mCause).c_str(),
      ToString(aAction.mFocusChange).c_str());

  mInputContext = aContext;

  if (mInputContext.mIMEState.mEnabled != IMEEnabled::Disabled &&
      !ShouldKeyboardDismiss(mInputContext.mHTMLInputType,
                             mInputContext.mHTMLInputMode) &&
      aAction.UserMightRequestOpenVKB()) {
    // Don't reset keyboard when we should simply open the vkb
    mEditable->NotifyIME(EditableListener::NOTIFY_IME_OPEN_VKB);
    return;
  }

  // Post an event to keep calls in order relative to NotifyIME.
  nsAppShell::PostEvent([this, self = RefPtr<GeckoEditableSupport>(this),
                         context = mInputContext, action = aAction] {
    nsCOMPtr<nsIWidget> widget = GetWidget();

    if (!widget || widget->Destroyed()) {
      return;
    }
    NotifyIMEContext(context, action);
  });
}

void GeckoEditableSupport::NotifyIMEContext(const InputContext& aContext,
                                            const InputContextAction& aAction) {
  const bool inPrivateBrowsing = aContext.mInPrivateBrowsing;
  // isUserAction is used whether opening virtual keyboard. But long press
  // shouldn't open it.
  const bool isUserAction =
      aAction.mCause != InputContextAction::CAUSE_LONGPRESS &&
      !(aAction.mCause == InputContextAction::CAUSE_UNKNOWN_CHROME &&
        aContext.mIMEState.mEnabled == IMEEnabled::Enabled) &&
      (aAction.IsHandlingUserInput() || aContext.mHasHandledUserInput);
  const int32_t flags =
      (inPrivateBrowsing ? EditableListener::IME_FLAG_PRIVATE_BROWSING : 0) |
      (isUserAction ? EditableListener::IME_FLAG_USER_ACTION : 0) |
      (aAction.mFocusChange == InputContextAction::FOCUS_NOT_CHANGED
           ? EditableListener::IME_FOCUS_NOT_CHANGED
           : 0);

  mEditable->NotifyIMEContext(static_cast<int32_t>(aContext.mIMEState.mEnabled),
                              aContext.mHTMLInputType, aContext.mHTMLInputMode,
                              aContext.mActionHint, aContext.mAutocapitalize,
                              aContext.mAutocorrect, flags);
}

InputContext GeckoEditableSupport::GetInputContext() {
  // GetInputContext is called from chrome process only
  MOZ_ASSERT(XRE_IsParentProcess());
  InputContext context = mInputContext;
  context.mIMEState.mOpen = IMEState::OPEN_STATE_NOT_SUPPORTED;
  return context;
}

void GeckoEditableSupport::TransferParent(jni::Object::Param aEditableParent) {
  AutoGeckoEditableBlocker blocker(this);

  mEditable->SetParent(aEditableParent);

  // If we are already focused, make sure the new parent has our token
  // and focus information, so it can accept additional calls from us.
  if (mIMEFocusCount > 0) {
    mEditable->NotifyIME(EditableListener::NOTIFY_IME_OF_TOKEN);
    if (mIsRemote) {
      // GeckoEditableSupport::SetInputContext is called on chrome process
      // only, so mInputContext may be still invalid since it is set after
      // we have gotton focus.
      RefPtr<GeckoEditableSupport> self(this);
      nsAppShell::PostEvent([self = std::move(self)] {
        NS_WARNING_ASSERTION(
            self->mDispatcher,
            "Text dispatcher is still null. Why don't we get focus yet?");
        self->NotifyIMEContext(self->mInputContext, InputContextAction());
      });
    } else {
      NotifyIMEContext(mInputContext, InputContextAction());
    }
    mEditable->NotifyIME(EditableListener::NOTIFY_IME_OF_FOCUS);
    // We have focus, so don't destroy editable child.
    return;
  }

  if (mIsRemote && !mDispatcher) {
    // Detach now if we were only attached temporarily.
    OnRemovedFrom(/* dispatcher */ nullptr);
  }
}

void GeckoEditableSupport::SetOnBrowserChild(dom::BrowserChild* aBrowserChild) {
  MOZ_ASSERT(!XRE_IsParentProcess());
  NS_ENSURE_TRUE_VOID(aBrowserChild);

  const dom::ContentChild* const contentChild =
      dom::ContentChild::GetSingleton();
  RefPtr<widget::PuppetWidget> widget(aBrowserChild->WebWidget());
  NS_ENSURE_TRUE_VOID(contentChild && widget);

  // Get the content/tab ID in order to get the correct
  // IGeckoEditableParent object, which GeckoEditableChild uses to
  // communicate with the parent process.
  const uint64_t contentId = contentChild->GetID();
  const uint64_t tabId = aBrowserChild->GetTabId();
  NS_ENSURE_TRUE_VOID(contentId && tabId);

  RefPtr<widget::TextEventDispatcherListener> listener =
      widget->GetNativeTextEventDispatcherListener();

  if (!listener ||
      listener.get() ==
          static_cast<widget::TextEventDispatcherListener*>(widget)) {
    // We need to set a new listener.
    const auto editableChild = java::GeckoEditableChild::New(
        /* parent */ nullptr, /* default */ false);

    // Temporarily attach so we can receive the initial editable parent.
    auto editableSupport =
        jni::NativeWeakPtrHolder<GeckoEditableSupport>::Attach(editableChild,
                                                               editableChild);
    auto accEditableSupport(editableSupport.Access());
    MOZ_RELEASE_ASSERT(accEditableSupport);

    // Tell PuppetWidget to use our listener for IME operations.
    widget->SetNativeTextEventDispatcherListener(
        accEditableSupport.AsRefPtr().get());

    accEditableSupport->mEditableAttached = true;

    // Connect the new child to a parent that corresponds to the BrowserChild.
    java::GeckoServiceChildProcess::GetEditableParent(editableChild, contentId,
                                                      tabId);
    return;
  }

  // We need to update the existing listener to use the new parent.

  // We expect the existing TextEventDispatcherListener to be a
  // GeckoEditableSupport object, so we perform a sanity check to make
  // sure, by comparing their respective vtable pointers.
  const RefPtr<widget::GeckoEditableSupport> dummy =
      new widget::GeckoEditableSupport(/* child */ nullptr);
  NS_ENSURE_TRUE_VOID(*reinterpret_cast<const uintptr_t*>(listener.get()) ==
                      *reinterpret_cast<const uintptr_t*>(dummy.get()));

  const auto support =
      static_cast<widget::GeckoEditableSupport*>(listener.get());
  if (!support->mEditableAttached) {
    // Temporarily attach so we can receive the initial editable parent.
    jni::NativeWeakPtrHolder<GeckoEditableSupport>::AttachExisting(
        support->GetJavaEditable(), do_AddRef(support));
    support->mEditableAttached = true;
  }

  // Transfer to a new parent that corresponds to the BrowserChild.
  java::GeckoServiceChildProcess::GetEditableParent(support->GetJavaEditable(),
                                                    contentId, tabId);
}

nsIWidget* GeckoEditableSupport::GetWidget() const {
  MOZ_ASSERT(NS_IsMainThread());
  return mDispatcher ? mDispatcher->GetWidget() : GetNsWindow();
}

nsWindow* GeckoEditableSupport::GetNsWindow() const {
  MOZ_ASSERT(NS_IsMainThread());

  auto acc(mWindow.Access());
  if (!acc) {
    return nullptr;
  }

  return acc->GetNsWindow();
}

void GeckoEditableSupport::OnImeInsertImage(jni::ByteArray::Param aData,
                                            jni::String::Param aMimeType) {
  AutoGeckoEditableBlocker blocker(this);

  nsCString mimeType(aMimeType->ToCString());
  nsCOMPtr<nsIInputStream> byteStream;

  nsresult rv = NS_NewByteInputStream(
      getter_AddRefs(byteStream),
      mozilla::Span(
          reinterpret_cast<const char*>(aData->GetElements().Elements()),
          aData->Length()),
      NS_ASSIGNMENT_COPY);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return;
  }

  nsCOMPtr<nsITransferable> trans =
      do_CreateInstance("@mozilla.org/widget/transferable;1");
  if (NS_WARN_IF(!trans)) {
    return;
  }
  trans->Init(nullptr);
  rv = trans->SetTransferData(mimeType.get(), byteStream);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return;
  }

  nsCOMPtr<nsIWidget> widget = GetWidget();
  if (NS_WARN_IF(!widget) || NS_WARN_IF(widget->Destroyed())) {
    return;
  }

  WidgetContentCommandEvent command(true, eContentCommandPasteTransferable,
                                    widget);
  command.mTransferable = trans.forget();
  nsEventStatus status;
  widget->DispatchEvent(&command, status);
}

}  // namespace widget
}  // namespace mozilla

quality99%

¤ Dauer der Verarbeitung: 0.31 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.