зеркало из https://github.com/mozilla/pjs.git
337 строки
12 KiB
JavaScript
337 строки
12 KiB
JavaScript
/**
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* EventUtils provides some utility methods for creating and sending DOM events.
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* Current methods:
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* sendMouseEvent
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* sendChar
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* sendString
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* sendKey
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*/
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/**
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* Send a mouse event to the node with id aTarget. The "event" passed in to
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* aEvent is just a JavaScript object with the properties set that the real
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* mouse event object should have. This includes the type of the mouse event.
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* E.g. to send an click event to the node with id 'node' you might do this:
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*
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* sendMouseEvent({type:'click'}, 'node');
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*/
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function sendMouseEvent(aEvent, aTarget) {
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if (['click', 'mousedown', 'mouseup', 'mouseover', 'mouseout'].indexOf(aEvent.type) == -1) {
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throw new Error("sendMouseEvent doesn't know about event type '"+aEvent.type+"'");
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}
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// For events to trigger the UA's default actions they need to be "trusted"
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netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserWrite');
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var event = document.createEvent('MouseEvent');
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var typeArg = aEvent.type;
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var canBubbleArg = true;
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var cancelableArg = true;
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var viewArg = window;
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var detailArg = aEvent.detail || (aEvent.type == 'click' ||
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aEvent.type == 'mousedown' ||
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aEvent.type == 'mouseup' ? 1 : 0);
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var screenXArg = aEvent.screenX || 0;
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var screenYArg = aEvent.screenY || 0;
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var clientXArg = aEvent.clientX || 0;
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var clientYArg = aEvent.clientY || 0;
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var ctrlKeyArg = aEvent.ctrlKey || false;
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var altKeyArg = aEvent.altKey || false;
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var shiftKeyArg = aEvent.shiftKey || false;
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var metaKeyArg = aEvent.metaKey || false;
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var buttonArg = aEvent.button || 0;
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var relatedTargetArg = aEvent.relatedTarget || null;
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event.initMouseEvent(typeArg, canBubbleArg, cancelableArg, viewArg, detailArg,
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screenXArg, screenYArg, clientXArg, clientYArg,
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ctrlKeyArg, altKeyArg, shiftKeyArg, metaKeyArg,
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buttonArg, relatedTargetArg);
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document.getElementById(aTarget).dispatchEvent(event);
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}
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/**
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* Send the char aChar to the node with id aTarget. If aTarget is not
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* provided, use "target". This method handles casing of chars (sends the
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* right charcode, and sends a shift key for uppercase chars). No other
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* modifiers are handled at this point.
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*
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* For now this method only works for English letters (lower and upper case)
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* and the digits 0-9.
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*
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* Returns true if the keypress event was accepted (no calls to preventDefault
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* or anything like that), false otherwise.
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*/
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function sendChar(aChar, aTarget) {
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// DOM event charcodes match ASCII (JS charcodes) for a-zA-Z0-9.
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var hasShift = (aChar == aChar.toUpperCase());
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var charCode = aChar.charCodeAt(0);
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var keyCode = charCode;
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if (!hasShift) {
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// For lowercase letters, the keyCode is actually 32 less than the charCode
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keyCode -= 0x20;
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}
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return __doEventDispatch(aTarget, charCode, keyCode, hasShift);
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}
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/**
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* Send the string aStr to the node with id aTarget. If aTarget is not
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* provided, use "target".
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*
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* For now this method only works for English letters (lower and upper case)
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* and the digits 0-9.
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*/
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function sendString(aStr, aTarget) {
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for (var i = 0; i < aStr.length; ++i) {
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sendChar(aStr.charAt(i), aTarget);
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}
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}
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/**
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* Send the non-character key aKey to the node with id aTarget. If aTarget is
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* not provided, use "target". The name of the key should be a lowercase
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* version of the part that comes after "DOM_VK_" in the KeyEvent constant
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* name for this key. No modifiers are handled at this point.
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*
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* Returns true if the keypress event was accepted (no calls to preventDefault
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* or anything like that), false otherwise.
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*/
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function sendKey(aKey, aTarget) {
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keyName = "DOM_VK_" + aKey.toUpperCase();
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if (!KeyEvent[keyName]) {
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throw "Unknown key: " + keyName;
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}
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return __doEventDispatch(aTarget, 0, KeyEvent[keyName], false);
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}
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/**
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* Actually perform event dispatch given a charCode, keyCode, and boolean for
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* whether "shift" was pressed. Send the event to the node with id aTarget. If
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* aTarget is not provided, use "target".
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*
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* Returns true if the keypress event was accepted (no calls to preventDefault
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* or anything like that), false otherwise.
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*/
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function __doEventDispatch(aTarget, aCharCode, aKeyCode, aHasShift) {
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if (aTarget === undefined) {
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aTarget = "target";
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}
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// Make our events trusted
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netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
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var event = document.createEvent("KeyEvents");
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event.initKeyEvent("keydown", true, true, document.defaultView,
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false, false, aHasShift, false,
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aKeyCode, 0);
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var accepted = $(aTarget).dispatchEvent(event);
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// Cancelling keydown cancels keypress too
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if (accepted) {
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event = document.createEvent("KeyEvents");
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if (aCharCode) {
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event.initKeyEvent("keypress", true, true, document.defaultView,
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false, false, aHasShift, false,
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0, aCharCode);
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} else {
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event.initKeyEvent("keypress", true, true, document.defaultView,
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false, false, aHasShift, false,
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aKeyCode, 0);
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}
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accepted = $(aTarget).dispatchEvent(event);
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}
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// Always send keyup
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var event = document.createEvent("KeyEvents");
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event.initKeyEvent("keyup", true, true, document.defaultView,
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false, false, aHasShift, false,
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aKeyCode, 0);
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$(aTarget).dispatchEvent(event);
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return accepted;
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}
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/**
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* Parse the key modifier flags from aEvent. Used to share code between
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* synthesizeMouse and synthesizeKey.
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*/
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function _parseModifiers(aEvent)
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{
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const masks = Components.interfaces.nsIDOMNSEvent;
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var mval = 0;
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if (aEvent.shiftKey)
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mval |= masks.SHIFT_MASK;
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if (aEvent.ctrlKey)
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mval |= masks.CONTROL_MASK;
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if (aEvent.altKey)
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mval |= masks.ALT_MASK;
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if (aEvent.metaKey)
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mval |= masks.META_MASK;
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if (aEvent.accelKey)
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mval |= (navigator.platform.indexOf("Mac") >= 0) ? masks.META_MASK :
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masks.CONTROL_MASK;
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return mval;
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}
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/**
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* Synthesize a mouse event on a target. The actual client point is determined
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* by taking the aTarget's client box and offseting it by aOffsetX and
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* aOffsetY. This allows mouse clicks to be simulated by calling this method.
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*
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* aEvent is an object which may contain the properties:
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* shiftKey, ctrlKey, altKey, metaKey, accessKey, type
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*
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* If the type is specified, an mouse event of that type is fired. Otherwise,
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* a mousedown followed by a mouse up is performed.
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*/
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function synthesizeMouse(aTarget, aOffsetX, aOffsetY, aEvent)
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{
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netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor).
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getInterface(Components.interfaces.nsIDOMWindowUtils);
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if (utils) {
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var button = aEvent.button || 0;
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var clickCount = aEvent.clickCount || 1;
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var modifiers = _parseModifiers(aEvent);
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var left = aTarget.boxObject.x;
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var top = aTarget.boxObject.y;
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if (aEvent.type) {
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utils.sendMouseEvent(aEvent.type, left + aOffsetX, top + aOffsetY, button, clickCount, modifiers);
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}
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else {
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utils.sendMouseEvent("mousedown", left + aOffsetX, top + aOffsetY, button, clickCount, modifiers);
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utils.sendMouseEvent("mouseup", left + aOffsetX, top + aOffsetY, button, clickCount, modifiers);
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}
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}
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}
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/**
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* Synthesize a key event. It is targeted at whatever would be targeted by an
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* actual keypress by the user, typically the focused element.
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*
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* aKey should be either a character or a keycode starting with VK_ such as
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* VK_ENTER.
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*
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* aEvent is an object which may contain the properties:
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* shiftKey, ctrlKey, altKey, metaKey, accessKey, type
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*
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* If the type is specified, a key event of that type is fired. Otherwise,
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* a keydown, a keypress and then a keyup event are fired in sequence.
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*/
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function synthesizeKey(aKey, aEvent)
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{
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netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor).
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getInterface(Components.interfaces.nsIDOMWindowUtils);
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if (utils) {
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var keyCode = 0, charCode = 0;
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if (aKey.indexOf("VK_") == 0)
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keyCode = KeyEvent["DOM_" + aKey];
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else
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charCode = aKey.charCodeAt(0);
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var modifiers = _parseModifiers(aEvent);
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if (aEvent.type) {
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utils.sendKeyEvent(aEvent.type, keyCode, charCode, modifiers);
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}
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else {
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utils.sendKeyEvent("keydown", keyCode, charCode, modifiers);
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utils.sendKeyEvent("keypress", keyCode, charCode, modifiers);
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utils.sendKeyEvent("keyup", keyCode, charCode, modifiers);
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}
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}
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}
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var _gSeenEvent = false;
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/**
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* Indicate that an event with an original target of aExpectedTarget and
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* a type of aExpectedEvent is expected to be fired, or not expected to
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* be fired.
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*/
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function _expectEvent(aExpectedTarget, aExpectedEvent, aTestName)
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{
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if (!aExpectedTarget || !aExpectedEvent)
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return null;
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_gSeenEvent = false;
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var type = (aExpectedEvent.charAt(0) == "!") ?
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aExpectedEvent.substring(1) : aExpectedEvent;
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var eventHandler = function(event) {
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var epassed = (!_gSeenEvent && event.originalTarget == aExpectedTarget &&
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event.type == type);
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is(epassed, true, aTestName + " " + type + " event target " + (_gSeenEvent ? "twice" : ""));
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_gSeenEvent = true;
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};
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aExpectedTarget.addEventListener(type, eventHandler, false);
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return eventHandler;
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}
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/**
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* Check if the event was fired or not. The event handler aEventHandler
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* will be removed.
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*/
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function _checkExpectedEvent(aExpectedTarget, aExpectedEvent, aEventHandler, aTestName)
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{
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if (aEventHandler) {
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var expectEvent = (aExpectedEvent.charAt(0) != "!");
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var type = expectEvent ? aExpectedEvent : aExpectedEvent.substring(1);
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aExpectedTarget.removeEventListener(type, aEventHandler, false);
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var desc = type + " event";
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if (!expectEvent)
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desc += " not";
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is(_gSeenEvent, expectEvent, aTestName + " " + desc + " fired");
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}
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_gSeenEvent = false;
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}
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/**
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* Similar to synthesizeMouse except that a test is performed to see if an
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* event is fired at the right target as a result.
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*
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* aExpectedTarget - the expected originalTarget of the event.
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* aExpectedEvent - the expected type of the event, such as 'select'.
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* aTestName - the test name when outputing results
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*
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* To test that an event is not fired, use an expected type preceded by an
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* exclamation mark, such as '!select'. This might be used to test that a
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* click on a disabled element doesn't fire certain events for instance.
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*/
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function synthesizeMouseExpectEvent(aTarget, aOffsetX, aOffsetY, aEvent,
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aExpectedTarget, aExpectedEvent, aTestName)
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{
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var eventHandler = _expectEvent(aExpectedTarget, aExpectedEvent, aTestName);
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synthesizeMouse(aTarget, aOffsetX, aOffsetY, aEvent);
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_checkExpectedEvent(aExpectedTarget, aExpectedEvent, eventHandler, aTestName);
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}
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/**
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* Similar to synthesizeKey except that a test is performed to see if an
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* event is fired at the right target as a result.
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*
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* aExpectedTarget - the expected originalTarget of the event.
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* aExpectedEvent - the expected type of the event, such as 'select'.
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* aTestName - the test name when outputing results
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*
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* To test that an event is not fired, use an expected type preceded by an
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* exclamation mark, such as '!select'.
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*/
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function synthesizeKeyExpectEvent(key, aEvent, aExpectedTarget, aExpectedEvent, aTestName)
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{
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var eventHandler = _expectEvent(aExpectedTarget, aExpectedEvent, aTestName);
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synthesizeKey(key, aEvent);
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_checkExpectedEvent(aExpectedTarget, aExpectedEvent, eventHandler, aTestName);
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}
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