gecko-dev/testing/marionette/EventUtils.js

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JavaScript

/* 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/. */
/**
* EventUtils provides some utility methods for creating and sending DOM events.
* Current methods:
* sendMouseEvent
* sendChar
* sendString
* sendKey
* synthesizeMouse
* synthesizeMouseAtCenter
* synthesizeMouseScroll
* synthesizeKey
* synthesizeMouseExpectEvent
* synthesizeKeyExpectEvent
*
* When adding methods to this file, please add a performance test for it.
*/
/**
* Send a mouse event to the node aTarget (aTarget can be an id, or an
* actual node) . The "event" passed in to aEvent is just a JavaScript
* object with the properties set that the real mouse event object should
* have. This includes the type of the mouse event.
* E.g. to send an click event to the node with id 'node' you might do this:
*
* sendMouseEvent({type:'click'}, 'node');
*/
function getElement(id) {
return ((typeof(id) == "string") ?
document.getElementById(id) : id);
};
this.$ = this.getElement;
const KeyEvent = Components.interfaces.nsIDOMKeyEvent;
function sendMouseEvent(aEvent, aTarget, aWindow) {
if (['click', 'dblclick', 'mousedown', 'mouseup', 'mouseover', 'mouseout'].indexOf(aEvent.type) == -1) {
throw new Error("sendMouseEvent doesn't know about event type '" + aEvent.type + "'");
}
if (!aWindow) {
aWindow = window;
}
if (!(aTarget instanceof Element)) {
aTarget = aWindow.document.getElementById(aTarget);
}
var event = aWindow.document.createEvent('MouseEvent');
var typeArg = aEvent.type;
var canBubbleArg = true;
var cancelableArg = true;
var viewArg = aWindow;
var detailArg = aEvent.detail || (aEvent.type == 'click' ||
aEvent.type == 'mousedown' ||
aEvent.type == 'mouseup' ? 1 :
aEvent.type == 'dblclick'? 2 : 0);
var screenXArg = aEvent.screenX || 0;
var screenYArg = aEvent.screenY || 0;
var clientXArg = aEvent.clientX || 0;
var clientYArg = aEvent.clientY || 0;
var ctrlKeyArg = aEvent.ctrlKey || false;
var altKeyArg = aEvent.altKey || false;
var shiftKeyArg = aEvent.shiftKey || false;
var metaKeyArg = aEvent.metaKey || false;
var buttonArg = aEvent.button || 0;
var relatedTargetArg = aEvent.relatedTarget || null;
event.initMouseEvent(typeArg, canBubbleArg, cancelableArg, viewArg, detailArg,
screenXArg, screenYArg, clientXArg, clientYArg,
ctrlKeyArg, altKeyArg, shiftKeyArg, metaKeyArg,
buttonArg, relatedTargetArg);
//removed: SpecialPowers.dispatchEvent(aWindow, aTarget, event);
}
/**
* Send the char aChar to the focused element. This method handles casing of
* chars (sends the right charcode, and sends a shift key for uppercase chars).
* No other modifiers are handled at this point.
*
* For now this method only works for English letters (lower and upper case)
* and the digits 0-9.
*/
function sendChar(aChar, aWindow) {
// DOM event charcodes match ASCII (JS charcodes) for a-zA-Z0-9.
var hasShift = (aChar == aChar.toUpperCase());
synthesizeKey(aChar, { shiftKey: hasShift }, aWindow);
}
/**
* Send the string aStr to the focused element.
*
* For now this method only works for English letters (lower and upper case)
* and the digits 0-9.
*/
function sendString(aStr, aWindow) {
for (var i = 0; i < aStr.length; ++i) {
sendChar(aStr.charAt(i), aWindow);
}
}
/**
* Send the non-character key aKey to the focused node.
* The name of the key should be the part that comes after "DOM_VK_" in the
* KeyEvent constant name for this key.
* No modifiers are handled at this point.
*/
function sendKey(aKey, aWindow) {
var keyName = "VK_" + aKey.toUpperCase();
synthesizeKey(keyName, { shiftKey: false }, aWindow);
}
/**
* Parse the key modifier flags from aEvent. Used to share code between
* synthesizeMouse and synthesizeKey.
*/
function _parseModifiers(aEvent)
{
const masks = Components.interfaces.nsIDOMNSEvent;
var mval = 0;
if (aEvent.shiftKey)
mval |= masks.SHIFT_MASK;
if (aEvent.ctrlKey)
mval |= masks.CONTROL_MASK;
if (aEvent.altKey)
mval |= masks.ALT_MASK;
if (aEvent.metaKey)
mval |= masks.META_MASK;
if (aEvent.accelKey)
mval |= (navigator.platform.indexOf("Mac") >= 0) ? masks.META_MASK :
masks.CONTROL_MASK;
return mval;
}
/**
* Synthesize a mouse event on a target. The actual client point is determined
* by taking the aTarget's client box and offseting it by aOffsetX and
* aOffsetY. This allows mouse clicks to be simulated by calling this method.
*
* aEvent is an object which may contain the properties:
* shiftKey, ctrlKey, altKey, metaKey, accessKey, clickCount, button, type
*
* If the type is specified, an mouse event of that type is fired. Otherwise,
* a mousedown followed by a mouse up is performed.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeMouse(aTarget, aOffsetX, aOffsetY, aEvent, aWindow)
{
var rect = aTarget.getBoundingClientRect();
synthesizeMouseAtPoint(rect.left + aOffsetX, rect.top + aOffsetY,
aEvent, aWindow);
}
/*
* Synthesize a mouse event at a particular point in aWindow.
*
* aEvent is an object which may contain the properties:
* shiftKey, ctrlKey, altKey, metaKey, accessKey, clickCount, button, type
*
* If the type is specified, an mouse event of that type is fired. Otherwise,
* a mousedown followed by a mouse up is performed.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeMouseAtPoint(left, top, aEvent, aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (utils) {
var button = aEvent.button || 0;
var clickCount = aEvent.clickCount || 1;
var modifiers = _parseModifiers(aEvent);
if (("type" in aEvent) && aEvent.type) {
utils.sendMouseEvent(aEvent.type, left, top, button, clickCount, modifiers);
}
else {
utils.sendMouseEvent("mousedown", left, top, button, clickCount, modifiers);
utils.sendMouseEvent("mouseup", left, top, button, clickCount, modifiers);
}
}
}
// Call synthesizeMouse with coordinates at the center of aTarget.
function synthesizeMouseAtCenter(aTarget, aEvent, aWindow)
{
var rect = aTarget.getBoundingClientRect();
synthesizeMouse(aTarget, rect.width / 2, rect.height / 2, aEvent,
aWindow);
}
/**
* Synthesize a mouse scroll event on a target. The actual client point is determined
* by taking the aTarget's client box and offseting it by aOffsetX and
* aOffsetY.
*
* aEvent is an object which may contain the properties:
* shiftKey, ctrlKey, altKey, metaKey, accessKey, button, type, axis, delta, hasPixels
*
* If the type is specified, a mouse scroll event of that type is fired. Otherwise,
* "DOMMouseScroll" is used.
*
* If the axis is specified, it must be one of "horizontal" or "vertical". If not specified,
* "vertical" is used.
*
* 'delta' is the amount to scroll by (can be positive or negative). It must
* be specified.
*
* 'hasPixels' specifies whether kHasPixels should be set in the scrollFlags.
*
* 'isMomentum' specifies whether kIsMomentum should be set in the scrollFlags.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeMouseScroll(aTarget, aOffsetX, aOffsetY, aEvent, aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (utils) {
// See nsMouseScrollFlags in nsGUIEvent.h
const kIsVertical = 0x02;
const kIsHorizontal = 0x04;
const kHasPixels = 0x08;
const kIsMomentum = 0x40;
var button = aEvent.button || 0;
var modifiers = _parseModifiers(aEvent);
var rect = aTarget.getBoundingClientRect();
var left = rect.left;
var top = rect.top;
var type = (("type" in aEvent) && aEvent.type) || "DOMMouseScroll";
var axis = aEvent.axis || "vertical";
var scrollFlags = (axis == "horizontal") ? kIsHorizontal : kIsVertical;
if (aEvent.hasPixels) {
scrollFlags |= kHasPixels;
}
if (aEvent.isMomentum) {
scrollFlags |= kIsMomentum;
}
utils.sendMouseScrollEvent(type, left + aOffsetX, top + aOffsetY, button,
scrollFlags, aEvent.delta, modifiers);
}
}
function _computeKeyCodeFromChar(aChar)
{
if (aChar.length != 1) {
return 0;
}
const nsIDOMKeyEvent = Components.interfaces.nsIDOMKeyEvent;
if (aChar >= 'a' && aChar <= 'z') {
return nsIDOMKeyEvent.DOM_VK_A + aChar.charCodeAt(0) - 'a'.charCodeAt(0);
}
if (aChar >= 'A' && aChar <= 'Z') {
return nsIDOMKeyEvent.DOM_VK_A + aChar.charCodeAt(0) - 'A'.charCodeAt(0);
}
if (aChar >= '0' && aChar <= '9') {
return nsIDOMKeyEvent.DOM_VK_0 + aChar.charCodeAt(0) - '0'.charCodeAt(0);
}
// returns US keyboard layout's keycode
switch (aChar) {
case '~':
case '`':
return nsIDOMKeyEvent.DOM_VK_BACK_QUOTE;
case '!':
return nsIDOMKeyEvent.DOM_VK_1;
case '@':
return nsIDOMKeyEvent.DOM_VK_2;
case '#':
return nsIDOMKeyEvent.DOM_VK_3;
case '$':
return nsIDOMKeyEvent.DOM_VK_4;
case '%':
return nsIDOMKeyEvent.DOM_VK_5;
case '^':
return nsIDOMKeyEvent.DOM_VK_6;
case '&':
return nsIDOMKeyEvent.DOM_VK_7;
case '*':
return nsIDOMKeyEvent.DOM_VK_8;
case '(':
return nsIDOMKeyEvent.DOM_VK_9;
case ')':
return nsIDOMKeyEvent.DOM_VK_0;
case '-':
case '_':
return nsIDOMKeyEvent.DOM_VK_SUBTRACT;
case '+':
case '=':
return nsIDOMKeyEvent.DOM_VK_EQUALS;
case '{':
case '[':
return nsIDOMKeyEvent.DOM_VK_OPEN_BRACKET;
case '}':
case ']':
return nsIDOMKeyEvent.DOM_VK_CLOSE_BRACKET;
case '|':
case '\\':
return nsIDOMKeyEvent.DOM_VK_BACK_SLASH;
case ':':
case ';':
return nsIDOMKeyEvent.DOM_VK_SEMICOLON;
case '\'':
case '"':
return nsIDOMKeyEvent.DOM_VK_QUOTE;
case '<':
case ',':
return nsIDOMKeyEvent.DOM_VK_COMMA;
case '>':
case '.':
return nsIDOMKeyEvent.DOM_VK_PERIOD;
case '?':
case '/':
return nsIDOMKeyEvent.DOM_VK_SLASH;
default:
return 0;
}
}
/**
* isKeypressFiredKey() returns TRUE if the given key should cause keypress
* event when widget handles the native key event. Otherwise, FALSE.
*
* aDOMKeyCode should be one of consts of nsIDOMKeyEvent::DOM_VK_*, or a key
* name begins with "VK_", or a character.
*/
function isKeypressFiredKey(aDOMKeyCode)
{
const KeyEvent = Components.interfaces.nsIDOMKeyEvent;
if (typeof(aDOMKeyCode) == "string") {
if (aDOMKeyCode.indexOf("VK_") == 0) {
aDOMKeyCode = KeyEvent["DOM_" + aDOMKeyCode];
if (!aDOMKeyCode) {
throw "Unknown key: " + aDOMKeyCode;
}
} else {
// If the key generates a character, it must cause a keypress event.
return true;
}
}
switch (aDOMKeyCode) {
case KeyEvent.DOM_VK_SHIFT:
case KeyEvent.DOM_VK_CONTROL:
case KeyEvent.DOM_VK_ALT:
case KeyEvent.DOM_VK_CAPS_LOCK:
case KeyEvent.DOM_VK_NUM_LOCK:
case KeyEvent.DOM_VK_SCROLL_LOCK:
case KeyEvent.DOM_VK_META:
return false;
default:
return true;
}
}
/**
* Synthesize a key event. It is targeted at whatever would be targeted by an
* actual keypress by the user, typically the focused element.
*
* aKey should be either a character or a keycode starting with VK_ such as
* VK_ENTER.
*
* aEvent is an object which may contain the properties:
* shiftKey, ctrlKey, altKey, metaKey, accessKey, type
*
* If the type is specified, a key event of that type is fired. Otherwise,
* a keydown, a keypress and then a keyup event are fired in sequence.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeKey(aKey, aEvent, aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (utils) {
var keyCode = 0, charCode = 0;
if (aKey.indexOf("VK_") == 0) {
keyCode = KeyEvent["DOM_" + aKey];
if (!keyCode) {
throw "Unknown key: " + aKey;
}
} else {
charCode = aKey.charCodeAt(0);
keyCode = _computeKeyCodeFromChar(aKey.charAt(0));
}
var modifiers = _parseModifiers(aEvent);
if (!("type" in aEvent) || !aEvent.type) {
// Send keydown + (optional) keypress + keyup events.
var keyDownDefaultHappened =
utils.sendKeyEvent("keydown", keyCode, 0, modifiers);
if (isKeypressFiredKey(keyCode)) {
utils.sendKeyEvent("keypress", charCode ? 0 : keyCode, charCode,
modifiers, !keyDownDefaultHappened);
}
utils.sendKeyEvent("keyup", keyCode, 0, modifiers);
} else if (aEvent.type == "keypress") {
// Send standalone keypress event.
utils.sendKeyEvent(aEvent.type, charCode ? 0 : keyCode,
charCode, modifiers);
} else {
// Send other standalone event than keypress.
utils.sendKeyEvent(aEvent.type, keyCode, 0, modifiers);
}
}
}
var _gSeenEvent = false;
/**
* Indicate that an event with an original target of aExpectedTarget and
* a type of aExpectedEvent is expected to be fired, or not expected to
* be fired.
*/
function _expectEvent(aExpectedTarget, aExpectedEvent, aTestName)
{
if (!aExpectedTarget || !aExpectedEvent)
return null;
_gSeenEvent = false;
var type = (aExpectedEvent.charAt(0) == "!") ?
aExpectedEvent.substring(1) : aExpectedEvent;
var eventHandler = function(event) {
var epassed = (!_gSeenEvent && event.originalTarget == aExpectedTarget &&
event.type == type);
is(epassed, true, aTestName + " " + type + " event target " + (_gSeenEvent ? "twice" : ""));
_gSeenEvent = true;
};
aExpectedTarget.addEventListener(type, eventHandler, false);
return eventHandler;
}
/**
* Check if the event was fired or not. The event handler aEventHandler
* will be removed.
*/
function _checkExpectedEvent(aExpectedTarget, aExpectedEvent, aEventHandler, aTestName)
{
if (aEventHandler) {
var expectEvent = (aExpectedEvent.charAt(0) != "!");
var type = expectEvent ? aExpectedEvent : aExpectedEvent.substring(1);
aExpectedTarget.removeEventListener(type, aEventHandler, false);
var desc = type + " event";
if (!expectEvent)
desc += " not";
is(_gSeenEvent, expectEvent, aTestName + " " + desc + " fired");
}
_gSeenEvent = false;
}
/**
* Similar to synthesizeMouse except that a test is performed to see if an
* event is fired at the right target as a result.
*
* aExpectedTarget - the expected originalTarget of the event.
* aExpectedEvent - the expected type of the event, such as 'select'.
* aTestName - the test name when outputing results
*
* To test that an event is not fired, use an expected type preceded by an
* exclamation mark, such as '!select'. This might be used to test that a
* click on a disabled element doesn't fire certain events for instance.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeMouseExpectEvent(aTarget, aOffsetX, aOffsetY, aEvent,
aExpectedTarget, aExpectedEvent, aTestName,
aWindow)
{
var eventHandler = _expectEvent(aExpectedTarget, aExpectedEvent, aTestName);
synthesizeMouse(aTarget, aOffsetX, aOffsetY, aEvent, aWindow);
_checkExpectedEvent(aExpectedTarget, aExpectedEvent, eventHandler, aTestName);
}
/**
* Similar to synthesizeKey except that a test is performed to see if an
* event is fired at the right target as a result.
*
* aExpectedTarget - the expected originalTarget of the event.
* aExpectedEvent - the expected type of the event, such as 'select'.
* aTestName - the test name when outputing results
*
* To test that an event is not fired, use an expected type preceded by an
* exclamation mark, such as '!select'.
*
* aWindow is optional, and defaults to the current window object.
*/
function synthesizeKeyExpectEvent(key, aEvent, aExpectedTarget, aExpectedEvent,
aTestName, aWindow)
{
var eventHandler = _expectEvent(aExpectedTarget, aExpectedEvent, aTestName);
synthesizeKey(key, aEvent, aWindow);
_checkExpectedEvent(aExpectedTarget, aExpectedEvent, eventHandler, aTestName);
}
function disableNonTestMouseEvents(aDisable)
{
var domutils = _getDOMWindowUtils();
domutils.disableNonTestMouseEvents(aDisable);
}
function _getDOMWindowUtils(aWindow)
{
if (!aWindow) {
aWindow = window;
}
//TODO: this is assuming we are in chrome space
return aWindow.QueryInterface(Components.interfaces.nsIInterfaceRequestor).
getInterface(Components.interfaces.nsIDOMWindowUtils);
}
// Must be synchronized with nsIDOMWindowUtils.
const COMPOSITION_ATTR_RAWINPUT = 0x02;
const COMPOSITION_ATTR_SELECTEDRAWTEXT = 0x03;
const COMPOSITION_ATTR_CONVERTEDTEXT = 0x04;
const COMPOSITION_ATTR_SELECTEDCONVERTEDTEXT = 0x05;
/**
* Synthesize a composition event.
*
* @param aEvent The composition event information. This must
* have |type| member. The value must be
* "compositionstart", "compositionend" or
* "compositionupdate".
* And also this may have |data| and |locale| which
* would be used for the value of each property of
* the composition event. Note that the data would
* be ignored if the event type were
* "compositionstart".
* @param aWindow Optional (If null, current |window| will be used)
*/
function synthesizeComposition(aEvent, aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (!utils) {
return;
}
utils.sendCompositionEvent(aEvent.type, aEvent.data ? aEvent.data : "",
aEvent.locale ? aEvent.locale : "");
}
/**
* Synthesize a text event.
*
* @param aEvent The text event's information, this has |composition|
* and |caret| members. |composition| has |string| and
* |clauses| members. |clauses| must be array object. Each
* object has |length| and |attr|. And |caret| has |start| and
* |length|. See the following tree image.
*
* aEvent
* +-- composition
* | +-- string
* | +-- clauses[]
* | +-- length
* | +-- attr
* +-- caret
* +-- start
* +-- length
*
* Set the composition string to |composition.string|. Set its
* clauses information to the |clauses| array.
*
* When it's composing, set the each clauses' length to the
* |composition.clauses[n].length|. The sum of the all length
* values must be same as the length of |composition.string|.
* Set nsIDOMWindowUtils.COMPOSITION_ATTR_* to the
* |composition.clauses[n].attr|.
*
* When it's not composing, set 0 to the
* |composition.clauses[0].length| and
* |composition.clauses[0].attr|.
*
* Set caret position to the |caret.start|. It's offset from
* the start of the composition string. Set caret length to
* |caret.length|. If it's larger than 0, it should be wide
* caret. However, current nsEditor doesn't support wide
* caret, therefore, you should always set 0 now.
*
* @param aWindow Optional (If null, current |window| will be used)
*/
function synthesizeText(aEvent, aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (!utils) {
return;
}
if (!aEvent.composition || !aEvent.composition.clauses ||
!aEvent.composition.clauses[0]) {
return;
}
var firstClauseLength = aEvent.composition.clauses[0].length;
var firstClauseAttr = aEvent.composition.clauses[0].attr;
var secondClauseLength = 0;
var secondClauseAttr = 0;
var thirdClauseLength = 0;
var thirdClauseAttr = 0;
if (aEvent.composition.clauses[1]) {
secondClauseLength = aEvent.composition.clauses[1].length;
secondClauseAttr = aEvent.composition.clauses[1].attr;
if (aEvent.composition.clauses[2]) {
thirdClauseLength = aEvent.composition.clauses[2].length;
thirdClauseAttr = aEvent.composition.clauses[2].attr;
}
}
var caretStart = -1;
var caretLength = 0;
if (aEvent.caret) {
caretStart = aEvent.caret.start;
caretLength = aEvent.caret.length;
}
utils.sendTextEvent(aEvent.composition.string,
firstClauseLength, firstClauseAttr,
secondClauseLength, secondClauseAttr,
thirdClauseLength, thirdClauseAttr,
caretStart, caretLength);
}
/**
* Synthesize a query selected text event.
*
* @param aWindow Optional (If null, current |window| will be used)
* @return An nsIQueryContentEventResult object. If this failed,
* the result might be null.
*/
function synthesizeQuerySelectedText(aWindow)
{
var utils = _getDOMWindowUtils(aWindow);
if (!utils) {
return null;
}
return utils.sendQueryContentEvent(utils.QUERY_SELECTED_TEXT, 0, 0, 0, 0);
}