зеркало из https://github.com/mozilla/gecko-dev.git
351 строка
11 KiB
JavaScript
351 строка
11 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
|
|
/* 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/. */
|
|
|
|
let Cc = Components.classes;
|
|
let Ci = Components.interfaces;
|
|
let Cu = Components.utils;
|
|
|
|
Cu.import("resource://gre/modules/Services.jsm");
|
|
|
|
var global = this;
|
|
|
|
let ClickEventHandler = {
|
|
init: function init() {
|
|
this._scrollable = null;
|
|
this._scrolldir = "";
|
|
this._startX = null;
|
|
this._startY = null;
|
|
this._screenX = null;
|
|
this._screenY = null;
|
|
this._lastFrame = null;
|
|
|
|
Cc["@mozilla.org/eventlistenerservice;1"]
|
|
.getService(Ci.nsIEventListenerService)
|
|
.addSystemEventListener(global, "mousedown", this, true);
|
|
|
|
addMessageListener("Autoscroll:Stop", this);
|
|
},
|
|
|
|
isAutoscrollBlocker: function(node) {
|
|
let mmPaste = Services.prefs.getBoolPref("middlemouse.paste");
|
|
let mmScrollbarPosition = Services.prefs.getBoolPref("middlemouse.scrollbarPosition");
|
|
|
|
while (node) {
|
|
if ((node instanceof content.HTMLAnchorElement || node instanceof content.HTMLAreaElement) &&
|
|
node.hasAttribute("href")) {
|
|
return true;
|
|
}
|
|
|
|
if (mmPaste && (node instanceof content.HTMLInputElement ||
|
|
node instanceof content.HTMLTextAreaElement)) {
|
|
return true;
|
|
}
|
|
|
|
if (node instanceof content.XULElement && mmScrollbarPosition
|
|
&& (node.localName == "scrollbar" || node.localName == "scrollcorner")) {
|
|
return true;
|
|
}
|
|
|
|
node = node.parentNode;
|
|
}
|
|
return false;
|
|
},
|
|
|
|
findNearestScrollableElement: function(aNode) {
|
|
// this is a list of overflow property values that allow scrolling
|
|
const scrollingAllowed = ['scroll', 'auto'];
|
|
|
|
// go upward in the DOM and find any parent element that has a overflow
|
|
// area and can therefore be scrolled
|
|
for (this._scrollable = aNode; this._scrollable;
|
|
this._scrollable = this._scrollable.parentNode) {
|
|
// do not use overflow based autoscroll for <html> and <body>
|
|
// Elements or non-html elements such as svg or Document nodes
|
|
// also make sure to skip select elements that are not multiline
|
|
if (!(this._scrollable instanceof content.HTMLElement) ||
|
|
((this._scrollable instanceof content.HTMLSelectElement) && !this._scrollable.multiple)) {
|
|
continue;
|
|
}
|
|
|
|
var overflowx = this._scrollable.ownerDocument.defaultView
|
|
.getComputedStyle(this._scrollable, '')
|
|
.getPropertyValue('overflow-x');
|
|
var overflowy = this._scrollable.ownerDocument.defaultView
|
|
.getComputedStyle(this._scrollable, '')
|
|
.getPropertyValue('overflow-y');
|
|
// we already discarded non-multiline selects so allow vertical
|
|
// scroll for multiline ones directly without checking for a
|
|
// overflow property
|
|
var scrollVert = this._scrollable.scrollTopMax &&
|
|
(this._scrollable instanceof content.HTMLSelectElement ||
|
|
scrollingAllowed.indexOf(overflowy) >= 0);
|
|
|
|
// do not allow horizontal scrolling for select elements, it leads
|
|
// to visual artifacts and is not the expected behavior anyway
|
|
if (!(this._scrollable instanceof content.HTMLSelectElement) &&
|
|
this._scrollable.scrollLeftMax &&
|
|
scrollingAllowed.indexOf(overflowx) >= 0) {
|
|
this._scrolldir = scrollVert ? "NSEW" : "EW";
|
|
break;
|
|
} else if (scrollVert) {
|
|
this._scrolldir = "NS";
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!this._scrollable) {
|
|
this._scrollable = aNode.ownerDocument.defaultView;
|
|
if (this._scrollable.scrollMaxX > 0) {
|
|
this._scrolldir = this._scrollable.scrollMaxY > 0 ? "NSEW" : "EW";
|
|
} else if (this._scrollable.scrollMaxY > 0) {
|
|
this._scrolldir = "NS";
|
|
} else if (this._scrollable.frameElement) {
|
|
this.findNearestScrollableElement(this._scrollable.frameElement);
|
|
} else {
|
|
this._scrollable = null; // abort scrolling
|
|
}
|
|
}
|
|
},
|
|
|
|
startScroll: function(event) {
|
|
|
|
this.findNearestScrollableElement(event.originalTarget);
|
|
|
|
if (!this._scrollable)
|
|
return;
|
|
|
|
let [enabled] = sendSyncMessage("Autoscroll:Start",
|
|
{scrolldir: this._scrolldir,
|
|
screenX: event.screenX,
|
|
screenY: event.screenY});
|
|
if (!enabled) {
|
|
this._scrollable = null;
|
|
return;
|
|
}
|
|
|
|
Cc["@mozilla.org/eventlistenerservice;1"]
|
|
.getService(Ci.nsIEventListenerService)
|
|
.addSystemEventListener(global, "mousemove", this, true);
|
|
addEventListener("pagehide", this, true);
|
|
|
|
this._ignoreMouseEvents = true;
|
|
this._startX = event.screenX;
|
|
this._startY = event.screenY;
|
|
this._screenX = event.screenX;
|
|
this._screenY = event.screenY;
|
|
this._scrollErrorX = 0;
|
|
this._scrollErrorY = 0;
|
|
this._lastFrame = content.mozAnimationStartTime;
|
|
|
|
content.mozRequestAnimationFrame(this);
|
|
},
|
|
|
|
stopScroll: function() {
|
|
if (this._scrollable) {
|
|
this._scrollable = null;
|
|
|
|
Cc["@mozilla.org/eventlistenerservice;1"]
|
|
.getService(Ci.nsIEventListenerService)
|
|
.removeSystemEventListener(global, "mousemove", this, true);
|
|
removeEventListener("pagehide", this, true);
|
|
}
|
|
},
|
|
|
|
accelerate: function(curr, start) {
|
|
const speed = 12;
|
|
var val = (curr - start) / speed;
|
|
|
|
if (val > 1)
|
|
return val * Math.sqrt(val) - 1;
|
|
if (val < -1)
|
|
return val * Math.sqrt(-val) + 1;
|
|
return 0;
|
|
},
|
|
|
|
roundToZero: function(num) {
|
|
if (num > 0)
|
|
return Math.floor(num);
|
|
return Math.ceil(num);
|
|
},
|
|
|
|
autoscrollLoop: function(timestamp) {
|
|
if (!this._scrollable) {
|
|
// Scrolling has been canceled
|
|
return;
|
|
}
|
|
|
|
// avoid long jumps when the browser hangs for more than
|
|
// |maxTimeDelta| ms
|
|
const maxTimeDelta = 100;
|
|
var timeDelta = Math.min(maxTimeDelta, timestamp - this._lastFrame);
|
|
// we used to scroll |accelerate()| pixels every 20ms (50fps)
|
|
var timeCompensation = timeDelta / 20;
|
|
this._lastFrame = timestamp;
|
|
|
|
var actualScrollX = 0;
|
|
var actualScrollY = 0;
|
|
// don't bother scrolling vertically when the scrolldir is only horizontal
|
|
// and the other way around
|
|
if (this._scrolldir != 'EW') {
|
|
var y = this.accelerate(this._screenY, this._startY) * timeCompensation;
|
|
var desiredScrollY = this._scrollErrorY + y;
|
|
actualScrollY = this.roundToZero(desiredScrollY);
|
|
this._scrollErrorY = (desiredScrollY - actualScrollY);
|
|
}
|
|
if (this._scrolldir != 'NS') {
|
|
var x = this.accelerate(this._screenX, this._startX) * timeCompensation;
|
|
var desiredScrollX = this._scrollErrorX + x;
|
|
actualScrollX = this.roundToZero(desiredScrollX);
|
|
this._scrollErrorX = (desiredScrollX - actualScrollX);
|
|
}
|
|
|
|
if (this._scrollable instanceof content.Window) {
|
|
this._scrollable.scrollBy(actualScrollX, actualScrollY);
|
|
} else { // an element with overflow
|
|
this._scrollable.scrollLeft += actualScrollX;
|
|
this._scrollable.scrollTop += actualScrollY;
|
|
}
|
|
content.mozRequestAnimationFrame(this);
|
|
},
|
|
|
|
sample: function(timestamp) {
|
|
this.autoscrollLoop(timestamp);
|
|
},
|
|
|
|
handleEvent: function(event) {
|
|
if (event.type == "mousemove") {
|
|
this._screenX = event.screenX;
|
|
this._screenY = event.screenY;
|
|
} else if (event.type == "mousedown") {
|
|
if (event.isTrusted &
|
|
!event.defaultPrevented &&
|
|
event.button == 1 &&
|
|
!this._scrollable &&
|
|
!this.isAutoscrollBlocker(event.originalTarget)) {
|
|
this.startScroll(event);
|
|
}
|
|
} else if (event.type == "pagehide") {
|
|
if (this._scrollable) {
|
|
var doc =
|
|
this._scrollable.ownerDocument || this._scrollable.document;
|
|
if (doc == event.target) {
|
|
sendAsyncMessage("Autoscroll:Cancel");
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
receiveMessage: function(msg) {
|
|
switch (msg.name) {
|
|
case "Autoscroll:Stop": {
|
|
this.stopScroll();
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
};
|
|
ClickEventHandler.init();
|
|
|
|
let PopupBlocking = {
|
|
popupData: null,
|
|
popupDataInternal: null,
|
|
|
|
init: function() {
|
|
addEventListener("DOMPopupBlocked", this, true);
|
|
addEventListener("pageshow", this, true);
|
|
addEventListener("pagehide", this, true);
|
|
|
|
addMessageListener("PopupBlocking:UnblockPopup", this);
|
|
},
|
|
|
|
receiveMessage: function(msg) {
|
|
switch (msg.name) {
|
|
case "PopupBlocking:UnblockPopup": {
|
|
let i = msg.data.index;
|
|
if (this.popupData && this.popupData[i]) {
|
|
let data = this.popupData[i];
|
|
let internals = this.popupDataInternal[i];
|
|
let dwi = internals.requestingWindow;
|
|
|
|
// If we have a requesting window and the requesting document is
|
|
// still the current document, open the popup.
|
|
if (dwi && dwi.document == internals.requestingDocument) {
|
|
dwi.open(data.popupWindowURI, data.popupWindowName, data.popupWindowFeatures);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
handleEvent: function(ev) {
|
|
switch (ev.type) {
|
|
case "DOMPopupBlocked":
|
|
return this.onPopupBlocked(ev);
|
|
case "pageshow":
|
|
return this.onPageShow(ev);
|
|
case "pagehide":
|
|
return this.onPageHide(ev);
|
|
}
|
|
},
|
|
|
|
onPopupBlocked: function(ev) {
|
|
if (!this.popupData) {
|
|
this.popupData = new Array();
|
|
this.popupDataInternal = new Array();
|
|
}
|
|
|
|
let obj = {
|
|
popupWindowURI: ev.popupWindowURI.spec,
|
|
popupWindowFeatures: ev.popupWindowFeatures,
|
|
popupWindowName: ev.popupWindowName
|
|
};
|
|
|
|
let internals = {
|
|
requestingWindow: ev.requestingWindow,
|
|
requestingDocument: ev.requestingWindow.document,
|
|
};
|
|
|
|
this.popupData.push(obj);
|
|
this.popupDataInternal.push(internals);
|
|
this.updateBlockedPopups(true);
|
|
},
|
|
|
|
onPageShow: function(ev) {
|
|
if (this.popupData) {
|
|
let i = 0;
|
|
while (i < this.popupData.length) {
|
|
// Filter out irrelevant reports.
|
|
if (this.popupDataInternal[i].requestingWindow &&
|
|
(this.popupDataInternal[i].requestingWindow.document ==
|
|
this.popupDataInternal[i].requestingDocument)) {
|
|
i++;
|
|
} else {
|
|
this.popupData.splice(i, 1);
|
|
this.popupDataInternal.splice(i, 1);
|
|
}
|
|
}
|
|
if (this.popupData.length == 0) {
|
|
this.popupData = null;
|
|
this.popupDataInternal = null;
|
|
}
|
|
this.updateBlockedPopups(false);
|
|
}
|
|
},
|
|
|
|
onPageHide: function(ev) {
|
|
if (this.popupData) {
|
|
this.popupData = null;
|
|
this.popupDataInternal = null;
|
|
this.updateBlockedPopups(false);
|
|
}
|
|
},
|
|
|
|
updateBlockedPopups: function(freshPopup) {
|
|
sendAsyncMessage("PopupBlocking:UpdateBlockedPopups",
|
|
{blockedPopups: this.popupData, freshPopup: freshPopup});
|
|
},
|
|
};
|
|
PopupBlocking.init(); |