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Mypal/dom/inputmethod/MozKeyboard.js

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/* 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/. */
"use strict";
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
const Cr = Components.results;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/DOMRequestHelper.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "cpmm",
"@mozilla.org/childprocessmessagemanager;1", "nsISyncMessageSender");
XPCOMUtils.defineLazyServiceGetter(this, "tm",
"@mozilla.org/thread-manager;1", "nsIThreadManager");
/*
* A WeakMap to map input method iframe window to
* it's active status, kbID, and ipcHelper.
*/
var WindowMap = {
// WeakMap of <window, object> pairs.
_map: null,
/*
* Set the object associated to the window and return it.
*/
_getObjForWin: function(win) {
if (!this._map) {
this._map = new WeakMap();
}
if (this._map.has(win)) {
return this._map.get(win);
} else {
let obj = {
active: false,
kbID: undefined,
ipcHelper: null
};
this._map.set(win, obj);
return obj;
}
},
/*
* Check if the given window is active.
*/
isActive: function(win) {
if (!this._map || !win) {
return false;
}
return this._getObjForWin(win).active;
},
/*
* Set the active status of the given window.
*/
setActive: function(win, isActive) {
if (!win) {
return;
}
let obj = this._getObjForWin(win);
obj.active = isActive;
},
/*
* Get the keyboard ID (assigned by Keyboard.jsm) of the given window.
*/
getKbID: function(win) {
if (!this._map || !win) {
return undefined;
}
let obj = this._getObjForWin(win);
return obj.kbID;
},
/*
* Set the keyboard ID (assigned by Keyboard.jsm) of the given window.
*/
setKbID: function(win, kbID) {
if (!win) {
return;
}
let obj = this._getObjForWin(win);
obj.kbID = kbID;
},
/*
* Get InputContextDOMRequestIpcHelper instance attached to this window.
*/
getInputContextIpcHelper: function(win) {
if (!win) {
return;
}
let obj = this._getObjForWin(win);
if (!obj.ipcHelper) {
obj.ipcHelper = new InputContextDOMRequestIpcHelper(win);
}
return obj.ipcHelper;
},
/*
* Unset InputContextDOMRequestIpcHelper instance.
*/
unsetInputContextIpcHelper: function(win) {
if (!win) {
return;
}
let obj = this._getObjForWin(win);
if (!obj.ipcHelper) {
return;
}
obj.ipcHelper = null;
}
};
var cpmmSendAsyncMessageWithKbID = function (self, msg, data) {
data.kbID = WindowMap.getKbID(self._window);
cpmm.sendAsyncMessage(msg, data);
};
/**
* ==============================================
* InputMethodManager
* ==============================================
*/
function MozInputMethodManager(win) {
this._window = win;
}
MozInputMethodManager.prototype = {
supportsSwitchingForCurrentInputContext: false,
_window: null,
classID: Components.ID("{7e9d7280-ef86-11e2-b778-0800200c9a66}"),
QueryInterface: XPCOMUtils.generateQI([]),
set oninputcontextfocus(handler) {
this.__DOM_IMPL__.setEventHandler("oninputcontextfocus", handler);
},
get oninputcontextfocus() {
return this.__DOM_IMPL__.getEventHandler("oninputcontextfocus");
},
set oninputcontextblur(handler) {
this.__DOM_IMPL__.setEventHandler("oninputcontextblur", handler);
},
get oninputcontextblur() {
return this.__DOM_IMPL__.getEventHandler("oninputcontextblur");
},
set onshowallrequest(handler) {
this.__DOM_IMPL__.setEventHandler("onshowallrequest", handler);
},
get onshowallrequest() {
return this.__DOM_IMPL__.getEventHandler("onshowallrequest");
},
set onnextrequest(handler) {
this.__DOM_IMPL__.setEventHandler("onnextrequest", handler);
},
get onnextrequest() {
return this.__DOM_IMPL__.getEventHandler("onnextrequest");
},
set onaddinputrequest(handler) {
this.__DOM_IMPL__.setEventHandler("onaddinputrequest", handler);
},
get onaddinputrequest() {
return this.__DOM_IMPL__.getEventHandler("onaddinputrequest");
},
set onremoveinputrequest(handler) {
this.__DOM_IMPL__.setEventHandler("onremoveinputrequest", handler);
},
get onremoveinputrequest() {
return this.__DOM_IMPL__.getEventHandler("onremoveinputrequest");
},
showAll: function() {
if (!WindowMap.isActive(this._window)) {
return;
}
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:ShowInputMethodPicker', {});
},
next: function() {
if (!WindowMap.isActive(this._window)) {
return;
}
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:SwitchToNextInputMethod', {});
},
supportsSwitching: function() {
if (!WindowMap.isActive(this._window)) {
return false;
}
return this.supportsSwitchingForCurrentInputContext;
},
hide: function() {
if (!WindowMap.isActive(this._window)) {
return;
}
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:RemoveFocus', {});
},
setSupportsSwitchingTypes: function(types) {
cpmm.sendAsyncMessage('System:SetSupportsSwitchingTypes', {
types: types
});
},
handleFocus: function(data) {
let detail = new MozInputContextFocusEventDetail(this._window, data);
let wrappedDetail =
this._window.MozInputContextFocusEventDetail._create(this._window, detail);
let event = new this._window.CustomEvent('inputcontextfocus',
{ cancelable: true, detail: wrappedDetail });
let handled = !this.__DOM_IMPL__.dispatchEvent(event);
// A gentle warning if the event is not preventDefault() by the content.
if (!handled) {
dump('MozKeyboard.js: A frame with input-manage permission did not' +
' handle the inputcontextfocus event dispatched.\n');
}
},
handleBlur: function(data) {
let event =
new this._window.Event('inputcontextblur', { cancelable: true });
let handled = !this.__DOM_IMPL__.dispatchEvent(event);
// A gentle warning if the event is not preventDefault() by the content.
if (!handled) {
dump('MozKeyboard.js: A frame with input-manage permission did not' +
' handle the inputcontextblur event dispatched.\n');
}
},
dispatchShowAllRequestEvent: function() {
this._fireSimpleEvent('showallrequest');
},
dispatchNextRequestEvent: function() {
this._fireSimpleEvent('nextrequest');
},
_fireSimpleEvent: function(eventType) {
let event = new this._window.Event(eventType);
let handled = !this.__DOM_IMPL__.dispatchEvent(event, { cancelable: true });
// A gentle warning if the event is not preventDefault() by the content.
if (!handled) {
dump('MozKeyboard.js: A frame with input-manage permission did not' +
' handle the ' + eventType + ' event dispatched.\n');
}
},
handleAddInput: function(data) {
let p = this._fireInputRegistryEvent('addinputrequest', data);
if (!p) {
return;
}
p.then(() => {
cpmm.sendAsyncMessage('System:InputRegistry:Add:Done', {
id: data.id
});
}, (error) => {
cpmm.sendAsyncMessage('System:InputRegistry:Add:Done', {
id: data.id,
error: error || 'Unknown Error'
});
});
},
handleRemoveInput: function(data) {
let p = this._fireInputRegistryEvent('removeinputrequest', data);
if (!p) {
return;
}
p.then(() => {
cpmm.sendAsyncMessage('System:InputRegistry:Remove:Done', {
id: data.id
});
}, (error) => {
cpmm.sendAsyncMessage('System:InputRegistry:Remove:Done', {
id: data.id,
error: error || 'Unknown Error'
});
});
},
_fireInputRegistryEvent: function(eventType, data) {
let detail = new MozInputRegistryEventDetail(this._window, data);
let wrappedDetail =
this._window.MozInputRegistryEventDetail._create(this._window, detail);
let event = new this._window.CustomEvent(eventType,
{ cancelable: true, detail: wrappedDetail });
let handled = !this.__DOM_IMPL__.dispatchEvent(event);
// A gentle warning if the event is not preventDefault() by the content.
if (!handled) {
dump('MozKeyboard.js: A frame with input-manage permission did not' +
' handle the ' + eventType + ' event dispatched.\n');
return null;
}
return detail.takeChainedPromise();
}
};
function MozInputContextFocusEventDetail(win, data) {
this.type = data.type;
this.inputType = data.inputType;
this.value = data.value;
// Exposed as MozInputContextChoicesInfo dictionary defined in WebIDL
this.choices = data.choices;
this.min = data.min;
this.max = data.max;
}
MozInputContextFocusEventDetail.prototype = {
classID: Components.ID("{e0794208-ac50-40e8-b22e-6ee0b4c4e6e8}"),
QueryInterface: XPCOMUtils.generateQI([]),
type: undefined,
inputType: undefined,
value: '',
choices: null,
min: undefined,
max: undefined
};
function MozInputRegistryEventDetail(win, data) {
this._window = win;
this.manifestURL = data.manifestURL;
this.inputId = data.inputId;
// Exposed as MozInputMethodInputManifest dictionary defined in WebIDL
this.inputManifest = data.inputManifest;
this._chainedPromise = Promise.resolve();
}
MozInputRegistryEventDetail.prototype = {
classID: Components.ID("{02130070-9b3e-4f38-bbd9-f0013aa36717}"),
QueryInterface: XPCOMUtils.generateQI([]),
_window: null,
manifestURL: undefined,
inputId: undefined,
inputManifest: null,
waitUntil: function(p) {
// Need an extra protection here since waitUntil will be an no-op
// when chainedPromise is already returned.
if (!this._chainedPromise) {
throw new this._window.DOMException(
'Must call waitUntil() within the event handling loop.',
'InvalidStateError');
}
this._chainedPromise = this._chainedPromise
.then(function() { return p; });
},
takeChainedPromise: function() {
var p = this._chainedPromise;
this._chainedPromise = null;
return p;
}
};
/**
* ==============================================
* InputMethod
* ==============================================
*/
function MozInputMethod() { }
MozInputMethod.prototype = {
__proto__: DOMRequestIpcHelper.prototype,
_window: null,
_inputcontext: null,
_wrappedInputContext: null,
_mgmt: null,
_wrappedMgmt: null,
_supportsSwitchingTypes: [],
_inputManageId: undefined,
classID: Components.ID("{4607330d-e7d2-40a4-9eb8-43967eae0142}"),
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIDOMGlobalPropertyInitializer,
Ci.nsIObserver,
Ci.nsISupportsWeakReference
]),
init: function mozInputMethodInit(win) {
this._window = win;
this._mgmt = new MozInputMethodManager(win);
this._wrappedMgmt = win.MozInputMethodManager._create(win, this._mgmt);
this.innerWindowID = win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.currentInnerWindowID;
Services.obs.addObserver(this, "inner-window-destroyed", false);
cpmm.addWeakMessageListener('Keyboard:Focus', this);
cpmm.addWeakMessageListener('Keyboard:Blur', this);
cpmm.addWeakMessageListener('Keyboard:SelectionChange', this);
cpmm.addWeakMessageListener('Keyboard:GetContext:Result:OK', this);
cpmm.addWeakMessageListener('Keyboard:SupportsSwitchingTypesChange', this);
cpmm.addWeakMessageListener('Keyboard:ReceiveHardwareKeyEvent', this);
cpmm.addWeakMessageListener('InputRegistry:Result:OK', this);
cpmm.addWeakMessageListener('InputRegistry:Result:Error', this);
if (this._hasInputManagePerm(win)) {
this._inputManageId = cpmm.sendSyncMessage('System:RegisterSync', {})[0];
cpmm.addWeakMessageListener('System:Focus', this);
cpmm.addWeakMessageListener('System:Blur', this);
cpmm.addWeakMessageListener('System:ShowAll', this);
cpmm.addWeakMessageListener('System:Next', this);
cpmm.addWeakMessageListener('System:InputRegistry:Add', this);
cpmm.addWeakMessageListener('System:InputRegistry:Remove', this);
}
},
uninit: function mozInputMethodUninit() {
this._window = null;
this._mgmt = null;
this._wrappedMgmt = null;
cpmm.removeWeakMessageListener('Keyboard:Focus', this);
cpmm.removeWeakMessageListener('Keyboard:Blur', this);
cpmm.removeWeakMessageListener('Keyboard:SelectionChange', this);
cpmm.removeWeakMessageListener('Keyboard:GetContext:Result:OK', this);
cpmm.removeWeakMessageListener('Keyboard:SupportsSwitchingTypesChange', this);
cpmm.removeWeakMessageListener('Keyboard:ReceiveHardwareKeyEvent', this);
cpmm.removeWeakMessageListener('InputRegistry:Result:OK', this);
cpmm.removeWeakMessageListener('InputRegistry:Result:Error', this);
this.setActive(false);
if (typeof this._inputManageId === 'number') {
cpmm.sendAsyncMessage('System:Unregister', {
'id': this._inputManageId
});
cpmm.removeWeakMessageListener('System:Focus', this);
cpmm.removeWeakMessageListener('System:Blur', this);
cpmm.removeWeakMessageListener('System:ShowAll', this);
cpmm.removeWeakMessageListener('System:Next', this);
cpmm.removeWeakMessageListener('System:InputRegistry:Add', this);
cpmm.removeWeakMessageListener('System:InputRegistry:Remove', this);
}
},
receiveMessage: function mozInputMethodReceiveMsg(msg) {
if (msg.name.startsWith('Keyboard') &&
!WindowMap.isActive(this._window)) {
return;
}
let data = msg.data;
if (msg.name.startsWith('System') &&
this._inputManageId !== data.inputManageId) {
return;
}
delete data.inputManageId;
let resolver = ('requestId' in data) ?
this.takePromiseResolver(data.requestId) : null;
switch(msg.name) {
case 'Keyboard:Focus':
// XXX Bug 904339 could receive 'text' event twice
this.setInputContext(data);
break;
case 'Keyboard:Blur':
this.setInputContext(null);
break;
case 'Keyboard:SelectionChange':
if (this.inputcontext) {
this._inputcontext.updateSelectionContext(data, false);
}
break;
case 'Keyboard:GetContext:Result:OK':
this.setInputContext(data);
break;
case 'Keyboard:SupportsSwitchingTypesChange':
this._supportsSwitchingTypes = data.types;
break;
case 'Keyboard:ReceiveHardwareKeyEvent':
if (!Ci.nsIHardwareKeyHandler) {
break;
}
let defaultPrevented = Ci.nsIHardwareKeyHandler.NO_DEFAULT_PREVENTED;
// |event.preventDefault()| is allowed to be called only when
// |event.cancelable| is true
if (this._inputcontext && data.keyDict.cancelable) {
defaultPrevented |= this._inputcontext.forwardHardwareKeyEvent(data);
}
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:ReplyHardwareKeyEvent', {
type: data.type,
defaultPrevented: defaultPrevented
});
break;
case 'InputRegistry:Result:OK':
resolver.resolve();
break;
case 'InputRegistry:Result:Error':
resolver.reject(data.error);
break;
case 'System:Focus':
this._mgmt.handleFocus(data);
break;
case 'System:Blur':
this._mgmt.handleBlur(data);
break;
case 'System:ShowAll':
this._mgmt.dispatchShowAllRequestEvent();
break;
case 'System:Next':
this._mgmt.dispatchNextRequestEvent();
break;
case 'System:InputRegistry:Add':
this._mgmt.handleAddInput(data);
break;
case 'System:InputRegistry:Remove':
this._mgmt.handleRemoveInput(data);
break;
}
},
observe: function mozInputMethodObserve(subject, topic, data) {
let wId = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
if (wId == this.innerWindowID)
this.uninit();
},
get mgmt() {
return this._wrappedMgmt;
},
get inputcontext() {
if (!WindowMap.isActive(this._window)) {
return null;
}
return this._wrappedInputContext;
},
set oninputcontextchange(handler) {
this.__DOM_IMPL__.setEventHandler("oninputcontextchange", handler);
},
get oninputcontextchange() {
return this.__DOM_IMPL__.getEventHandler("oninputcontextchange");
},
setInputContext: function mozKeyboardContextChange(data) {
if (this._inputcontext) {
this._inputcontext.destroy();
this._inputcontext = null;
this._wrappedInputContext = null;
this._mgmt.supportsSwitchingForCurrentInputContext = false;
}
if (data) {
this._mgmt.supportsSwitchingForCurrentInputContext =
(this._supportsSwitchingTypes.indexOf(data.inputType) !== -1);
this._inputcontext = new MozInputContext(data);
this._inputcontext.init(this._window);
// inputcontext will be exposed as a WebIDL object. Create its
// content-side object explicitly to avoid Bug 1001325.
this._wrappedInputContext =
this._window.MozInputContext._create(this._window, this._inputcontext);
}
let event = new this._window.Event("inputcontextchange");
this.__DOM_IMPL__.dispatchEvent(event);
},
setActive: function mozInputMethodSetActive(isActive) {
if (WindowMap.isActive(this._window) === isActive) {
return;
}
WindowMap.setActive(this._window, isActive);
if (isActive) {
// Activate current input method.
// If there is already an active context, then this will trigger
// a GetContext:Result:OK event, and we can initialize ourselves.
// Otherwise silently ignored.
// get keyboard ID from Keyboard.jsm,
// or if we already have it, get it from our map
// Note: if we need to get it from Keyboard.jsm,
// we have to use a synchronous message
var kbID = WindowMap.getKbID(this._window);
if (kbID) {
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:RegisterSync', {});
} else {
let res = cpmm.sendSyncMessage('Keyboard:RegisterSync', {});
WindowMap.setKbID(this._window, res[0]);
}
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:GetContext', {});
} else {
// Deactive current input method.
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:Unregister', {});
if (this._inputcontext) {
this.setInputContext(null);
}
}
},
addInput: function(inputId, inputManifest) {
return this.createPromiseWithId(function(resolverId) {
let appId = this._window.document.nodePrincipal.appId;
cpmm.sendAsyncMessage('InputRegistry:Add', {
requestId: resolverId,
inputId: inputId,
inputManifest: inputManifest,
appId: appId
});
}.bind(this));
},
removeInput: function(inputId) {
return this.createPromiseWithId(function(resolverId) {
let appId = this._window.document.nodePrincipal.appId;
cpmm.sendAsyncMessage('InputRegistry:Remove', {
requestId: resolverId,
inputId: inputId,
appId: appId
});
}.bind(this));
},
setValue: function(value) {
cpmm.sendAsyncMessage('System:SetValue', {
'value': value
});
},
setSelectedOption: function(index) {
cpmm.sendAsyncMessage('System:SetSelectedOption', {
'index': index
});
},
setSelectedOptions: function(indexes) {
cpmm.sendAsyncMessage('System:SetSelectedOptions', {
'indexes': indexes
});
},
removeFocus: function() {
cpmm.sendAsyncMessage('System:RemoveFocus', {});
},
// Only the system app needs that, so instead of testing a permission which
// is allowed for all chrome:// url, we explicitly test that this is the
// system app's start URL.
_hasInputManagePerm: function(win) {
let url = win.location.href;
let systemAppIndex;
try {
systemAppIndex = Services.prefs.getCharPref('b2g.system_startup_url');
} catch(e) {
dump('MozKeyboard.jsm: no system app startup url set (pref is b2g.system_startup_url)');
}
dump(`MozKeyboard.jsm expecting ${systemAppIndex}\n`);
return url == systemAppIndex;
}
};
/**
* ==============================================
* InputContextDOMRequestIpcHelper
* ==============================================
*/
function InputContextDOMRequestIpcHelper(win) {
this.initDOMRequestHelper(win,
["Keyboard:GetText:Result:OK",
"Keyboard:GetText:Result:Error",
"Keyboard:SetSelectionRange:Result:OK",
"Keyboard:ReplaceSurroundingText:Result:OK",
"Keyboard:SendKey:Result:OK",
"Keyboard:SendKey:Result:Error",
"Keyboard:SetComposition:Result:OK",
"Keyboard:EndComposition:Result:OK",
"Keyboard:SequenceError"]);
}
InputContextDOMRequestIpcHelper.prototype = {
__proto__: DOMRequestIpcHelper.prototype,
_inputContext: null,
attachInputContext: function(inputCtx) {
if (this._inputContext) {
throw new Error("InputContextDOMRequestIpcHelper: detach the context first.");
}
this._inputContext = inputCtx;
},
// Unset ourselves when the window is destroyed.
uninit: function() {
WindowMap.unsetInputContextIpcHelper(this._window);
},
detachInputContext: function() {
// All requests that are still pending need to be invalidated
// because the context is no longer valid.
this.forEachPromiseResolver(k => {
this.takePromiseResolver(k).reject("InputContext got destroyed");
});
this._inputContext = null;
},
receiveMessage: function(msg) {
if (!this._inputContext) {
dump('InputContextDOMRequestIpcHelper received message without context attached.\n');
return;
}
this._inputContext.receiveMessage(msg);
}
};
function MozInputContextSelectionChangeEventDetail(ctx, ownAction) {
this._ctx = ctx;
this.ownAction = ownAction;
}
MozInputContextSelectionChangeEventDetail.prototype = {
classID: Components.ID("ef35443e-a400-4ae3-9170-c2f4e05f7aed"),
QueryInterface: XPCOMUtils.generateQI([]),
ownAction: false,
get selectionStart() {
return this._ctx.selectionStart;
},
get selectionEnd() {
return this._ctx.selectionEnd;
}
};
function MozInputContextSurroundingTextChangeEventDetail(ctx, ownAction) {
this._ctx = ctx;
this.ownAction = ownAction;
}
MozInputContextSurroundingTextChangeEventDetail.prototype = {
classID: Components.ID("1c50fdaf-74af-4b2e-814f-792caf65a168"),
QueryInterface: XPCOMUtils.generateQI([]),
ownAction: false,
get text() {
return this._ctx.text;
},
get textBeforeCursor() {
return this._ctx.textBeforeCursor;
},
get textAfterCursor() {
return this._ctx.textAfterCursor;
}
};
/**
* ==============================================
* HardwareInput
* ==============================================
*/
function MozHardwareInput() {
}
MozHardwareInput.prototype = {
classID: Components.ID("{1e38633d-d08b-4867-9944-afa5c648adb6}"),
QueryInterface: XPCOMUtils.generateQI([]),
};
/**
* ==============================================
* InputContext
* ==============================================
*/
function MozInputContext(data) {
this._context = {
type: data.type,
inputType: data.inputType,
inputMode: data.inputMode,
lang: data.lang,
selectionStart: data.selectionStart,
selectionEnd: data.selectionEnd,
text: data.value
};
this._contextId = data.contextId;
}
MozInputContext.prototype = {
_window: null,
_context: null,
_contextId: -1,
_ipcHelper: null,
_hardwareinput: null,
_wrappedhardwareinput: null,
classID: Components.ID("{1e38633d-d08b-4867-9944-afa5c648adb6}"),
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIObserver,
Ci.nsISupportsWeakReference
]),
init: function ic_init(win) {
this._window = win;
this._ipcHelper = WindowMap.getInputContextIpcHelper(win);
this._ipcHelper.attachInputContext(this);
this._hardwareinput = new MozHardwareInput();
this._wrappedhardwareinput =
this._window.MozHardwareInput._create(this._window, this._hardwareinput);
},
destroy: function ic_destroy() {
// A consuming application might still hold a cached version of
// this object. After destroying all methods will throw because we
// cannot create new promises anymore, but we still hold
// (outdated) information in the context. So let's clear that out.
for (var k in this._context) {
if (this._context.hasOwnProperty(k)) {
this._context[k] = null;
}
}
this._ipcHelper.detachInputContext();
this._ipcHelper = null;
this._window = null;
this._hardwareinput = null;
this._wrappedhardwareinput = null;
},
receiveMessage: function ic_receiveMessage(msg) {
if (!msg || !msg.json) {
dump('InputContext received message without data\n');
return;
}
let json = msg.json;
let resolver = this._ipcHelper.takePromiseResolver(json.requestId);
if (!resolver) {
dump('InputContext received invalid requestId.\n');
return;
}
// Update context first before resolving promise to avoid race condition
if (json.selectioninfo) {
this.updateSelectionContext(json.selectioninfo, true);
}
switch (msg.name) {
case "Keyboard:SendKey:Result:OK":
resolver.resolve(true);
break;
case "Keyboard:SendKey:Result:Error":
resolver.reject(json.error);
break;
case "Keyboard:GetText:Result:OK":
resolver.resolve(json.text);
break;
case "Keyboard:GetText:Result:Error":
resolver.reject(json.error);
break;
case "Keyboard:SetSelectionRange:Result:OK":
case "Keyboard:ReplaceSurroundingText:Result:OK":
resolver.resolve(
Cu.cloneInto(json.selectioninfo, this._window));
break;
case "Keyboard:SequenceError":
// Occurs when a new element got focus, but the inputContext was
// not invalidated yet...
resolver.reject("InputContext has expired");
break;
case "Keyboard:SetComposition:Result:OK": // Fall through.
case "Keyboard:EndComposition:Result:OK":
resolver.resolve(true);
break;
default:
dump("Could not find a handler for " + msg.name);
resolver.reject();
break;
}
},
updateSelectionContext: function ic_updateSelectionContext(data, ownAction) {
if (!this._context) {
return;
}
let selectionDirty =
this._context.selectionStart !== data.selectionStart ||
this._context.selectionEnd !== data.selectionEnd;
let surroundDirty = selectionDirty || data.text !== this._contextId.text;
this._context.text = data.text;
this._context.selectionStart = data.selectionStart;
this._context.selectionEnd = data.selectionEnd;
if (selectionDirty) {
let selectionChangeDetail =
new MozInputContextSelectionChangeEventDetail(this, ownAction);
let wrappedSelectionChangeDetail =
this._window.MozInputContextSelectionChangeEventDetail
._create(this._window, selectionChangeDetail);
let selectionChangeEvent = new this._window.CustomEvent("selectionchange",
{ cancelable: false, detail: wrappedSelectionChangeDetail });
this.__DOM_IMPL__.dispatchEvent(selectionChangeEvent);
}
if (surroundDirty) {
let surroundingTextChangeDetail =
new MozInputContextSurroundingTextChangeEventDetail(this, ownAction);
let wrappedSurroundingTextChangeDetail =
this._window.MozInputContextSurroundingTextChangeEventDetail
._create(this._window, surroundingTextChangeDetail);
let selectionChangeEvent = new this._window.CustomEvent("surroundingtextchange",
{ cancelable: false, detail: wrappedSurroundingTextChangeDetail });
this.__DOM_IMPL__.dispatchEvent(selectionChangeEvent);
}
},
// tag name of the input field
get type() {
return this._context.type;
},
// type of the input field
get inputType() {
return this._context.inputType;
},
get inputMode() {
return this._context.inputMode;
},
get lang() {
return this._context.lang;
},
getText: function ic_getText(offset, length) {
let text;
if (offset && length) {
text = this._context.text.substr(offset, length);
} else if (offset) {
text = this._context.text.substr(offset);
} else {
text = this._context.text;
}
return this._window.Promise.resolve(text);
},
get selectionStart() {
return this._context.selectionStart;
},
get selectionEnd() {
return this._context.selectionEnd;
},
get text() {
return this._context.text;
},
get textBeforeCursor() {
let text = this._context.text;
let start = this._context.selectionStart;
return (start < 100) ?
text.substr(0, start) :
text.substr(start - 100, 100);
},
get textAfterCursor() {
let text = this._context.text;
let start = this._context.selectionStart;
let end = this._context.selectionEnd;
return text.substr(start, end - start + 100);
},
get hardwareinput() {
return this._wrappedhardwareinput;
},
setSelectionRange: function ic_setSelectionRange(start, length) {
let self = this;
return this._sendPromise(function(resolverId) {
cpmmSendAsyncMessageWithKbID(self, 'Keyboard:SetSelectionRange', {
contextId: self._contextId,
requestId: resolverId,
selectionStart: start,
selectionEnd: start + length
});
});
},
get onsurroundingtextchange() {
return this.__DOM_IMPL__.getEventHandler("onsurroundingtextchange");
},
set onsurroundingtextchange(handler) {
this.__DOM_IMPL__.setEventHandler("onsurroundingtextchange", handler);
},
get onselectionchange() {
return this.__DOM_IMPL__.getEventHandler("onselectionchange");
},
set onselectionchange(handler) {
this.__DOM_IMPL__.setEventHandler("onselectionchange", handler);
},
replaceSurroundingText: function ic_replaceSurrText(text, offset, length) {
let self = this;
return this._sendPromise(function(resolverId) {
cpmmSendAsyncMessageWithKbID(self, 'Keyboard:ReplaceSurroundingText', {
contextId: self._contextId,
requestId: resolverId,
text: text,
offset: offset || 0,
length: length || 0
});
});
},
deleteSurroundingText: function ic_deleteSurrText(offset, length) {
return this.replaceSurroundingText(null, offset, length);
},
sendKey: function ic_sendKey(dictOrKeyCode, charCode, modifiers, repeat) {
if (typeof dictOrKeyCode === 'number') {
// XXX: modifiers are ignored in this API method.
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:SendKey', {
contextId: this._contextId,
requestId: resolverId,
method: 'sendKey',
keyCode: dictOrKeyCode,
charCode: charCode,
repeat: repeat
});
});
} else if (typeof dictOrKeyCode === 'object') {
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:SendKey', {
contextId: this._contextId,
requestId: resolverId,
method: 'sendKey',
keyboardEventDict: this._getkeyboardEventDict(dictOrKeyCode)
});
});
} else {
// XXX: Should not reach here; implies WebIDL binding error.
throw new TypeError('Unknown argument passed.');
}
},
keydown: function ic_keydown(dict) {
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:SendKey', {
contextId: this._contextId,
requestId: resolverId,
method: 'keydown',
keyboardEventDict: this._getkeyboardEventDict(dict)
});
});
},
keyup: function ic_keyup(dict) {
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(this, 'Keyboard:SendKey', {
contextId: this._contextId,
requestId: resolverId,
method: 'keyup',
keyboardEventDict: this._getkeyboardEventDict(dict)
});
});
},
setComposition: function ic_setComposition(text, cursor, clauses, dict) {
let self = this;
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(self, 'Keyboard:SetComposition', {
contextId: self._contextId,
requestId: resolverId,
text: text,
cursor: (typeof cursor !== 'undefined') ? cursor : text.length,
clauses: clauses || null,
keyboardEventDict: this._getkeyboardEventDict(dict)
});
});
},
endComposition: function ic_endComposition(text, dict) {
let self = this;
return this._sendPromise((resolverId) => {
cpmmSendAsyncMessageWithKbID(self, 'Keyboard:EndComposition', {
contextId: self._contextId,
requestId: resolverId,
text: text || '',
keyboardEventDict: this._getkeyboardEventDict(dict)
});
});
},
// Generate a new keyboard event by the received keyboard dictionary
// and return defaultPrevented's result of the event after dispatching.
forwardHardwareKeyEvent: function ic_forwardHardwareKeyEvent(data) {
if (!Ci.nsIHardwareKeyHandler) {
return;
}
if (!this._context) {
return Ci.nsIHardwareKeyHandler.NO_DEFAULT_PREVENTED;
}
let evt = new this._window.KeyboardEvent(data.type,
Cu.cloneInto(data.keyDict,
this._window));
this._hardwareinput.__DOM_IMPL__.dispatchEvent(evt);
return this._getDefaultPreventedValue(evt);
},
_getDefaultPreventedValue: function(evt) {
if (!Ci.nsIHardwareKeyHandler) {
return;
}
let flags = Ci.nsIHardwareKeyHandler.NO_DEFAULT_PREVENTED;
if (evt.defaultPrevented) {
flags |= Ci.nsIHardwareKeyHandler.DEFAULT_PREVENTED;
}
if (evt.defaultPreventedByChrome) {
flags |= Ci.nsIHardwareKeyHandler.DEFAULT_PREVENTED_BY_CHROME;
}
if (evt.defaultPreventedByContent) {
flags |= Ci.nsIHardwareKeyHandler.DEFAULT_PREVENTED_BY_CONTENT;
}
return flags;
},
_sendPromise: function(callback) {
let self = this;
return this._ipcHelper.createPromiseWithId(function(aResolverId) {
if (!WindowMap.isActive(self._window)) {
self._ipcHelper.removePromiseResolver(aResolverId);
reject('Input method is not active.');
return;
}
callback(aResolverId);
});
},
// Take a MozInputMethodKeyboardEventDict dict, creates a keyboardEventDict
// object that can be sent to forms.js
_getkeyboardEventDict: function(dict) {
if (typeof dict !== 'object' || !dict.key) {
return;
}
var keyboardEventDict = {
key: dict.key,
code: dict.code,
repeat: dict.repeat,
flags: 0
};
if (dict.printable) {
keyboardEventDict.flags |=
Ci.nsITextInputProcessor.KEY_FORCE_PRINTABLE_KEY;
}
if (/^[a-zA-Z0-9]$/.test(dict.key)) {
// keyCode must follow the key value in this range;
// disregard the keyCode from content.
keyboardEventDict.keyCode = dict.key.toUpperCase().charCodeAt(0);
} else if (typeof dict.keyCode === 'number') {
// Allow keyCode to be specified for other key values.
keyboardEventDict.keyCode = dict.keyCode;
// Allow keyCode to be explicitly set to zero.
if (dict.keyCode === 0) {
keyboardEventDict.flags |=
Ci.nsITextInputProcessor.KEY_KEEP_KEYCODE_ZERO;
}
}
return keyboardEventDict;
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([MozInputMethod]);
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