'use strict';
exports.__esModule = true;
var _core = require('../core');
var core = _interopRequireWildcard(_core);
var _ismobilejs = require('ismobilejs');
var _ismobilejs2 = _interopRequireDefault(_ismobilejs);
var _accessibleTarget = require('./accessibleTarget');
var _accessibleTarget2 = _interopRequireDefault(_accessibleTarget);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
// add some extra variables to the container..
Object.assign(core.DisplayObject.prototype, _accessibleTarget2.default);
var KEY_CODE_TAB = 9;
var DIV_TOUCH_SIZE = 100;
var DIV_TOUCH_POS_X = 0;
var DIV_TOUCH_POS_Y = 0;
var DIV_TOUCH_ZINDEX = 2;
var DIV_HOOK_SIZE = 1;
var DIV_HOOK_POS_X = -1000;
var DIV_HOOK_POS_Y = -1000;
var DIV_HOOK_ZINDEX = 2;
/**
* The Accessibility manager reacreates the ability to tab and and have content read by screen
* readers. This is very important as it can possibly help people with disabilities access pixi
* content.
*
* Much like interaction any DisplayObject can be made accessible. This manager will map the
* events as if the mouse was being used, minimizing the efferot required to implement.
*
* @class
* @memberof PIXI
*/
var AccessibilityManager = function () {
/**
* @param {PIXI.CanvasRenderer|PIXI.WebGLRenderer} renderer - A reference to the current renderer
*/
function AccessibilityManager(renderer) {
_classCallCheck(this, AccessibilityManager);
if ((_ismobilejs2.default.tablet || _ismobilejs2.default.phone) && !navigator.isCocoonJS) {
this.createTouchHook();
}
// first we create a div that will sit over the pixi element. This is where the div overlays will go.
var div = document.createElement('div');
div.style.width = DIV_TOUCH_SIZE + 'px';
div.style.height = DIV_TOUCH_SIZE + 'px';
div.style.position = 'absolute';
div.style.top = DIV_TOUCH_POS_X + 'px';
div.style.left = DIV_TOUCH_POS_Y + 'px';
div.style.zIndex = DIV_TOUCH_ZINDEX;
/**
* This is the dom element that will sit over the pixi element. This is where the div overlays will go.
*
* @type {HTMLElement}
* @private
*/
this.div = div;
/**
* A simple pool for storing divs.
*
* @type {*}
* @private
*/
this.pool = [];
/**
* This is a tick used to check if an object is no longer being rendered.
*
* @type {Number}
* @private
*/
this.renderId = 0;
/**
* Setting this to true will visually show the divs
*
* @type {boolean}
*/
this.debug = false;
/**
* The renderer this accessibility manager works for.
*
* @member {PIXI.SystemRenderer}
*/
this.renderer = renderer;
/**
* The array of currently active accessible items.
*
* @member {Array<*>}
* @private
*/
this.children = [];
/**
* pre-bind the functions
*
* @private
*/
this._onKeyDown = this._onKeyDown.bind(this);
this._onMouseMove = this._onMouseMove.bind(this);
/**
* stores the state of the manager. If there are no accessible objects or the mouse is moving the will be false.
*
* @member {Array<*>}
* @private
*/
this.isActive = false;
this.isMobileAccessabillity = false;
// let listen for tab.. once pressed we can fire up and show the accessibility layer
window.addEventListener('keydown', this._onKeyDown, false);
}
/**
* Creates the touch hooks.
*
*/
AccessibilityManager.prototype.createTouchHook = function createTouchHook() {
var _this = this;
var hookDiv = document.createElement('button');
hookDiv.style.width = DIV_HOOK_SIZE + 'px';
hookDiv.style.height = DIV_HOOK_SIZE + 'px';
hookDiv.style.position = 'absolute';
hookDiv.style.top = DIV_HOOK_POS_X + 'px';
hookDiv.style.left = DIV_HOOK_POS_Y + 'px';
hookDiv.style.zIndex = DIV_HOOK_ZINDEX;
hookDiv.style.backgroundColor = '#FF0000';
hookDiv.title = 'HOOK DIV';
hookDiv.addEventListener('focus', function () {
_this.isMobileAccessabillity = true;
_this.activate();
document.body.removeChild(hookDiv);
});
document.body.appendChild(hookDiv);
};
/**
* Activating will cause the Accessibility layer to be shown. This is called when a user
* preses the tab key
*
* @private
*/
AccessibilityManager.prototype.activate = function activate() {
if (this.isActive) {
return;
}
this.isActive = true;
window.document.addEventListener('mousemove', this._onMouseMove, true);
window.removeEventListener('keydown', this._onKeyDown, false);
this.renderer.on('postrender', this.update, this);
if (this.renderer.view.parentNode) {
this.renderer.view.parentNode.appendChild(this.div);
}
};
/**
* Deactivating will cause the Accessibility layer to be hidden. This is called when a user moves
* the mouse
*
* @private
*/
AccessibilityManager.prototype.deactivate = function deactivate() {
if (!this.isActive || this.isMobileAccessabillity) {
return;
}
this.isActive = false;
window.document.removeEventListener('mousemove', this._onMouseMove);
window.addEventListener('keydown', this._onKeyDown, false);
this.renderer.off('postrender', this.update);
if (this.div.parentNode) {
this.div.parentNode.removeChild(this.div);
}
};
/**
* This recursive function will run throught he scene graph and add any new accessible objects to the DOM layer.
*
* @private
* @param {PIXI.Container} displayObject - The DisplayObject to check.
*/
AccessibilityManager.prototype.updateAccessibleObjects = function updateAccessibleObjects(displayObject) {
if (!displayObject.visible) {
return;
}
if (displayObject.accessible && displayObject.interactive) {
if (!displayObject._accessibleActive) {
this.addChild(displayObject);
}
displayObject.renderId = this.renderId;
}
var children = displayObject.children;
for (var i = children.length - 1; i >= 0; i--) {
this.updateAccessibleObjects(children[i]);
}
};
/**
* Before each render this function will ensure that all divs are mapped correctly to their DisplayObjects.
*
* @private
*/
AccessibilityManager.prototype.update = function update() {
if (!this.renderer.renderingToScreen) {
return;
}
// update children...
this.updateAccessibleObjects(this.renderer._lastObjectRendered);
var rect = this.renderer.view.getBoundingClientRect();
var sx = rect.width / this.renderer.width;
var sy = rect.height / this.renderer.height;
var div = this.div;
div.style.left = rect.left + 'px';
div.style.top = rect.top + 'px';
div.style.width = this.renderer.width + 'px';
div.style.height = this.renderer.height + 'px';
for (var i = 0; i < this.children.length; i++) {
var child = this.children[i];
if (child.renderId !== this.renderId) {
child._accessibleActive = false;
core.utils.removeItems(this.children, i, 1);
this.div.removeChild(child._accessibleDiv);
this.pool.push(child._accessibleDiv);
child._accessibleDiv = null;
i--;
if (this.children.length === 0) {
this.deactivate();
}
} else {
// map div to display..
div = child._accessibleDiv;
var hitArea = child.hitArea;
var wt = child.worldTransform;
if (child.hitArea) {
div.style.left = (wt.tx + hitArea.x * wt.a) * sx + 'px';
div.style.top = (wt.ty + hitArea.y * wt.d) * sy + 'px';
div.style.width = hitArea.width * wt.a * sx + 'px';
div.style.height = hitArea.height * wt.d * sy + 'px';
} else {
hitArea = child.getBounds();
this.capHitArea(hitArea);
div.style.left = hitArea.x * sx + 'px';
div.style.top = hitArea.y * sy + 'px';
div.style.width = hitArea.width * sx + 'px';
div.style.height = hitArea.height * sy + 'px';
}
}
}
// increment the render id..
this.renderId++;
};
/**
* TODO: docs.
*
* @param {Rectangle} hitArea - TODO docs
*/
AccessibilityManager.prototype.capHitArea = function capHitArea(hitArea) {
if (hitArea.x < 0) {
hitArea.width += hitArea.x;
hitArea.x = 0;
}
if (hitArea.y < 0) {
hitArea.height += hitArea.y;
hitArea.y = 0;
}
if (hitArea.x + hitArea.width > this.renderer.width) {
hitArea.width = this.renderer.width - hitArea.x;
}
if (hitArea.y + hitArea.height > this.renderer.height) {
hitArea.height = this.renderer.height - hitArea.y;
}
};
/**
* Adds a DisplayObject to the accessibility manager
*
* @private
* @param {DisplayObject} displayObject - The child to make accessible.
*/
AccessibilityManager.prototype.addChild = function addChild(displayObject) {
// this.activate();
var div = this.pool.pop();
if (!div) {
div = document.createElement('button');
div.style.width = DIV_TOUCH_SIZE + 'px';
div.style.height = DIV_TOUCH_SIZE + 'px';
div.style.backgroundColor = this.debug ? 'rgba(255,0,0,0.5)' : 'transparent';
div.style.position = 'absolute';
div.style.zIndex = DIV_TOUCH_ZINDEX;
div.style.borderStyle = 'none';
div.addEventListener('click', this._onClick.bind(this));
div.addEventListener('focus', this._onFocus.bind(this));
div.addEventListener('focusout', this._onFocusOut.bind(this));
}
if (displayObject.accessibleTitle) {
div.title = displayObject.accessibleTitle;
} else if (!displayObject.accessibleTitle && !displayObject.accessibleHint) {
div.title = 'displayObject ' + this.tabIndex;
}
if (displayObject.accessibleHint) {
div.setAttribute('aria-label', displayObject.accessibleHint);
}
//
displayObject._accessibleActive = true;
displayObject._accessibleDiv = div;
div.displayObject = displayObject;
this.children.push(displayObject);
this.div.appendChild(displayObject._accessibleDiv);
displayObject._accessibleDiv.tabIndex = displayObject.tabIndex;
};
/**
* Maps the div button press to pixi's InteractionManager (click)
*
* @private
* @param {MouseEvent} e - The click event.
*/
AccessibilityManager.prototype._onClick = function _onClick(e) {
var interactionManager = this.renderer.plugins.interaction;
interactionManager.dispatchEvent(e.target.displayObject, 'click', interactionManager.eventData);
};
/**
* Maps the div focus events to pixis InteractionManager (mouseover)
*
* @private
* @param {FocusEvent} e - The focus event.
*/
AccessibilityManager.prototype._onFocus = function _onFocus(e) {
var interactionManager = this.renderer.plugins.interaction;
interactionManager.dispatchEvent(e.target.displayObject, 'mouseover', interactionManager.eventData);
};
/**
* Maps the div focus events to pixis InteractionManager (mouseout)
*
* @private
* @param {FocusEvent} e - The focusout event.
*/
AccessibilityManager.prototype._onFocusOut = function _onFocusOut(e) {
var interactionManager = this.renderer.plugins.interaction;
interactionManager.dispatchEvent(e.target.displayObject, 'mouseout', interactionManager.eventData);
};
/**
* Is called when a key is pressed
*
* @private
* @param {KeyboardEvent} e - The keydown event.
*/
AccessibilityManager.prototype._onKeyDown = function _onKeyDown(e) {
if (e.keyCode !== KEY_CODE_TAB) {
return;
}
this.activate();
};
/**
* Is called when the mouse moves across the renderer element
*
* @private
*/
AccessibilityManager.prototype._onMouseMove = function _onMouseMove() {
this.deactivate();
};
/**
* Destroys the accessibility manager
*
*/
AccessibilityManager.prototype.destroy = function destroy() {
this.div = null;
for (var i = 0; i < this.children.length; i++) {
this.children[i].div = null;
}
window.document.removeEventListener('mousemove', this._onMouseMove);
window.removeEventListener('keydown', this._onKeyDown);
this.pool = null;
this.children = null;
this.renderer = null;
};
return AccessibilityManager;
}();
exports.default = AccessibilityManager;
core.WebGLRenderer.registerPlugin('accessibility', AccessibilityManager);
core.CanvasRenderer.registerPlugin('accessibility', AccessibilityManager);
//# sourceMappingURL=AccessibilityManager.js.map
