mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
434 lines
13 KiB
JavaScript
434 lines
13 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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'use strict';
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dump('======================= webapi+apps.js ======================= \n');
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let { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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Cu.import('resource://gre/modules/XPCOMUtils.jsm');
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Cu.import('resource://gre/modules/Services.jsm');
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Cu.import('resource://gre/modules/Geometry.jsm');
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XPCOMUtils.defineLazyServiceGetter(Services, 'fm',
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'@mozilla.org/focus-manager;1',
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'nsIFocusManager');
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// MozKeyboard
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(function VirtualKeyboardManager() {
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let activeElement = null;
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let isKeyboardOpened = false;
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function fireEvent(type, details) {
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let event = content.document.createEvent('CustomEvent');
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event.initCustomEvent(type, true, true, details ? details : {});
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content.dispatchEvent(event);
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}
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function maybeShowIme(targetElement) {
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// FIXME/bug 729623: work around apparent bug in the IME manager
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// in gecko.
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let readonly = targetElement.getAttribute('readonly');
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if (readonly)
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return false;
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let type = targetElement.type;
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// FIXME/bug 344616 is input type='number'
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// Until then, let's return 'number' even if the platform returns 'text'
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let attributeType = targetElement.getAttribute('type') || '';
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if (attributeType && attributeType.toLowerCase() === 'number')
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type = 'number';
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fireEvent('showime', { type: type });
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return true;
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}
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let constructor = {
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handleEvent: function vkm_handleEvent(evt) {
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switch (evt.type) {
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case 'resize':
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if (!isKeyboardOpened)
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return;
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activeElement.scrollIntoView(false);
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break;
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case 'keypress':
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if (evt.keyCode != evt.DOM_VK_ESCAPE || !isKeyboardOpened)
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return;
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fireEvent('hideime');
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isKeyboardOpened = false;
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evt.preventDefault();
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evt.stopPropagation();
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break;
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case 'mousedown':
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if (evt.target != activeElement || isKeyboardOpened)
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return;
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isKeyboardOpened = maybeShowIme(activeElement);
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break;
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}
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},
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observe: function vkm_observe(subject, topic, data) {
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let shouldOpen = parseInt(data);
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if (shouldOpen && !isKeyboardOpened) {
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activeElement = Services.fm.focusedElement;
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if (!activeElement || !maybeShowIme(activeElement)) {
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activeElement = null;
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return;
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}
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} else if (!shouldOpen && isKeyboardOpened) {
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fireEvent('hideime');
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}
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isKeyboardOpened = shouldOpen;
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}
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};
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Services.obs.addObserver(constructor, 'ime-enabled-state-changed', false);
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['keypress', 'mousedown', 'resize'].forEach(function vkm_events(type) {
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addEventListener(type, constructor, true);
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});
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})();
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const ContentPanning = {
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init: function cp_init() {
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['mousedown', 'mouseup', 'mousemove'].forEach(function(type) {
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addEventListener(type, ContentPanning, true);
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});
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},
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handleEvent: function cp_handleEvent(evt) {
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switch (evt.type) {
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case 'mousedown':
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this.onTouchStart(evt);
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break;
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case 'mousemove':
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this.onTouchMove(evt);
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break;
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case 'mouseup':
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this.onTouchEnd(evt);
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break;
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case 'click':
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evt.stopPropagation();
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evt.preventDefault();
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let target = evt.target;
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let view = target.ownerDocument ? target.ownerDocument.defaultView
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: target;
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view.removeEventListener('click', this, true, true);
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break;
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}
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},
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position: new Point(0 , 0),
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onTouchStart: function cp_onTouchStart(evt) {
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this.dragging = true;
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this.panning = false;
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let oldTarget = this.target;
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[this.target, this.scrollCallback] = this.getPannable(evt.target);
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// If there is a pan animation running (from a previous pan gesture) and
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// the user touch back the screen, stop this animation immediatly and
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// prevent the possible click action if the touch happens on the same
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// target.
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this.preventNextClick = false;
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if (KineticPanning.active) {
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KineticPanning.stop();
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if (oldTarget && oldTarget == this.target)
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this.preventNextClick = true;
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}
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this.position.set(evt.screenX, evt.screenY);
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KineticPanning.record(new Point(0, 0), evt.timeStamp);
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},
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onTouchEnd: function cp_onTouchEnd(evt) {
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if (!this.dragging)
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return;
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this.dragging = false;
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this.onTouchMove(evt);
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let click = evt.detail;
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if (this.target && click && (this.panning || this.preventNextClick)) {
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let target = this.target;
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let view = target.ownerDocument ? target.ownerDocument.defaultView
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: target;
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view.addEventListener('click', this, true, true);
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}
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if (this.panning)
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KineticPanning.start(this);
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},
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onTouchMove: function cp_onTouchMove(evt) {
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if (!this.dragging || !this.scrollCallback)
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return;
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let current = this.position;
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let delta = new Point(evt.screenX - current.x, evt.screenY - current.y);
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current.set(evt.screenX, evt.screenY);
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KineticPanning.record(delta, evt.timeStamp);
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this.scrollCallback(delta.scale(-1));
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// If a pan action happens, cancel the active state of the
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// current target.
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if (!this.panning && KineticPanning.isPan()) {
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this.panning = true;
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this._resetActive();
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}
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},
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onKineticBegin: function cp_onKineticBegin(evt) {
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},
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onKineticPan: function cp_onKineticPan(delta) {
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return !this.scrollCallback(delta);
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},
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onKineticEnd: function cp_onKineticEnd() {
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if (!this.dragging)
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this.scrollCallback = null;
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},
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getPannable: function cp_getPannable(node) {
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if (!(node instanceof Ci.nsIDOMHTMLElement) || node.tagName == 'HTML')
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return [null, null];
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let content = node.ownerDocument.defaultView;
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while (!(node instanceof Ci.nsIDOMHTMLBodyElement)) {
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let style = content.getComputedStyle(node, null);
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let overflow = [style.getPropertyValue('overflow'),
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style.getPropertyValue('overflow-x'),
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style.getPropertyValue('overflow-y')];
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let rect = node.getBoundingClientRect();
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let isAuto = (overflow.indexOf('auto') != -1 &&
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(rect.height < node.scrollHeight ||
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rect.width < node.scrollWidth));
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let isScroll = (overflow.indexOf('scroll') != -1);
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if (isScroll || isAuto)
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return [node, this._generateCallback(node)];
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node = node.parentNode;
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}
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return [content, this._generateCallback(content)];
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},
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_generateCallback: function cp_generateCallback(content) {
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function scroll(delta) {
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if (content instanceof Ci.nsIDOMHTMLElement) {
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let oldX = content.scrollLeft, oldY = content.scrollTop;
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content.scrollLeft += delta.x;
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content.scrollTop += delta.y;
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let newX = content.scrollLeft, newY = content.scrollTop;
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return (newX != oldX) || (newY != oldY);
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} else {
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let oldX = content.scrollX, oldY = content.scrollY;
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content.scrollBy(delta.x, delta.y);
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let newX = content.scrollX, newY = content.scrollY;
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return (newX != oldX) || (newY != oldY);
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}
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}
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return scroll;
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},
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get _domUtils() {
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delete this._domUtils;
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return this._domUtils = Cc['@mozilla.org/inspector/dom-utils;1']
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.getService(Ci.inIDOMUtils);
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},
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_resetActive: function cp_resetActive() {
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let root = this.target.ownerDocument || this.target.document;
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const kStateActive = 0x00000001;
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this._domUtils.setContentState(root.documentElement, kStateActive);
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}
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};
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ContentPanning.init();
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// Min/max velocity of kinetic panning. This is in pixels/millisecond.
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const kMinVelocity = 0.4;
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const kMaxVelocity = 6;
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// Constants that affect the "friction" of the scroll pane.
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const kExponentialC = 1000;
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const kPolynomialC = 100 / 1000000;
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// How often do we change the position of the scroll pane?
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// Too often and panning may jerk near the end.
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// Too little and panning will be choppy. In milliseconds.
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const kUpdateInterval = 16;
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// The numbers of momentums to use for calculating the velocity of the pan.
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// Those are taken from the end of the action
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const kSamples = 5;
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const KineticPanning = {
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_position: new Point(0, 0),
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_velocity: new Point(0, 0),
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_acceleration: new Point(0, 0),
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get active() {
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return this.target !== null;
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},
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target: null,
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start: function kp_start(target) {
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this.target = target;
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// Calculate the initial velocity of the movement based on user input
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let momentums = this.momentums.slice(-kSamples);
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let distance = new Point(0, 0);
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momentums.forEach(function(momentum) {
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distance.add(momentum.dx, momentum.dy);
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});
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let elapsed = momentums[momentums.length - 1].time - momentums[0].time;
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function clampFromZero(x, min, max) {
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if (x >= 0)
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return Math.max(min, Math.min(max, x));
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return Math.min(-min, Math.max(-max, x));
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}
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let velocityX = clampFromZero(distance.x / elapsed, 0, kMaxVelocity);
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let velocityY = clampFromZero(distance.y / elapsed, 0, kMaxVelocity);
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let velocity = this._velocity;
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velocity.set(Math.abs(velocityX) < kMinVelocity ? 0 : velocityX,
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Math.abs(velocityY) < kMinVelocity ? 0 : velocityY);
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this.momentums = [];
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// Set acceleration vector to opposite signs of velocity
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function sign(x) {
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return x ? (x > 0 ? 1 : -1) : 0;
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}
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this._acceleration.set(velocity.clone().map(sign).scale(-kPolynomialC));
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// Reset the position
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this._position.set(0, 0);
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this._startAnimation();
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this.target.onKineticBegin();
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},
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stop: function kp_stop() {
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if (!this.target)
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return;
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this.momentums = [];
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this.distance.set(0, 0);
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this.target.onKineticEnd();
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this.target = null;
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},
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momentums: [],
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record: function kp_record(delta, timestamp) {
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this.momentums.push({ 'time': timestamp, 'dx' : delta.x, 'dy' : delta.y });
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this.distance.add(delta.x, delta.y);
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},
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get threshold() {
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let dpi = content.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils)
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.displayDPI;
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let threshold = Services.prefs.getIntPref('ui.dragThresholdX') / 240 * dpi;
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delete this.threshold;
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return this.threshold = threshold;
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},
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distance: new Point(0, 0),
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isPan: function cp_isPan() {
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return (Math.abs(this.distance.x) > this.threshold ||
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Math.abs(this.distance.y) > this.threshold);
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},
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_startAnimation: function kp_startAnimation() {
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let c = kExponentialC;
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function getNextPosition(position, v, a, t) {
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// Important traits for this function:
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// p(t=0) is 0
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// p'(t=0) is v0
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//
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// We use exponential to get a smoother stop, but by itself exponential
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// is too smooth at the end. Adding a polynomial with the appropriate
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// weight helps to balance
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position.set(v.x * Math.exp(-t / c) * -c + a.x * t * t + v.x * c,
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v.y * Math.exp(-t / c) * -c + a.y * t * t + v.y * c);
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}
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let startTime = content.mozAnimationStartTime;
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let elapsedTime = 0, targetedTime = 0, averageTime = 0;
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let velocity = this._velocity;
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let acceleration = this._acceleration;
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let position = this._position;
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let nextPosition = new Point(0, 0);
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let delta = new Point(0, 0);
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let callback = (function(timestamp) {
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if (!this.target)
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return;
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// To make animation end fast enough but to keep smoothness, average the
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// ideal time frame (smooth animation) with the actual time lapse
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// (end fast enough).
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// Animation will never take longer than 2 times the ideal length of time.
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elapsedTime = timestamp - startTime;
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targetedTime += kUpdateInterval;
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averageTime = (targetedTime + elapsedTime) / 2;
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// Calculate new position.
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getNextPosition(nextPosition, velocity, acceleration, averageTime);
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delta.set(Math.round(nextPosition.x - position.x),
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Math.round(nextPosition.y - position.y));
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// Test to see if movement is finished for each component.
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if (delta.x * acceleration.x > 0)
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delta.x = position.x = velocity.x = acceleration.x = 0;
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if (delta.y * acceleration.y > 0)
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delta.y = position.y = velocity.y = acceleration.y = 0;
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if (velocity.equals(0, 0) || delta.equals(0, 0)) {
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this.stop();
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return;
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}
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position.add(delta);
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if (this.target.onKineticPan(delta.scale(-1))) {
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this.stop();
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return;
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}
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content.mozRequestAnimationFrame(callback);
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}).bind(this);
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content.mozRequestAnimationFrame(callback);
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}
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};
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