Disable link dragging and select text.
目前為
// ==UserScript==
// @name Select text inside a link like Opera
// @namespace eight04.blogspot.com
// @description Disable link dragging and select text.
// @include http://*
// @include https://*
// @version 4.0.4
// @grant GM_addStyle
// @run-at document-start
// ==/UserScript==
function inSelect(caretPos, selection){
var i, len = selection.rangeCount, range;
for (i = 0; i < len; i++) {
range = selection.getRangeAt(i);
if (range.isPointInRange(caretPos.offsetNode, caretPos.offset)) {
return true;
}
}
return false;
}
var force = {
target: null,
select: getSelection(),
currentPos: {
x: null,
y: null
},
startPos: {
x: null,
y: null
},
handleEvent: function(e){
if (e.type == "click") {
if (e.ctrlKey || e.shiftKey || e.altKey || e.button) {
return;
}
if (!this.select.isCollapsed) {
e.preventDefault();
e.stopPropagation();
}
} else if (e.type == "mousedown") {
if (e.ctrlKey || e.shiftKey || e.altKey || e.button) {
return;
}
if (!this.select.isCollapsed) {
var caretPos = document.caretPositionFromPoint(e.pageX - window.scrollX, e.pageY - window.scrollY);
if (!inSelect(caretPos, this.select)) {
this.select.collapse(caretPos.offsetNode, caretPos.offset);
}
}
} else if (e.type == "mouseup") {
this.checkMove = false;
if (!this.target) {
return;
}
this.uninit();
} else if (e.type == "mousemove") {
this.moveX = e.pageX - this.currentPos.x;
this.moveY = e.pageY - this.currentPos.y;
this.currentPos.x = e.pageX;
this.currentPos.y = e.pageY;
if (!this.target) {
return;
}
var caretPos = document.caretPositionFromPoint(this.currentPos.x - window.scrollX, this.currentPos.y - window.scrollY);
if (!this.multiSelect) {
this.select.extend(caretPos.offsetNode, caretPos.offset);
} else {
this.range.setEnd(caretPos.offsetNode, caretPos.offset);
}
} else if (e.type == "dragstart") {
if (e.button || e.altKey || e.shiftKey) {
return;
}
if (e.target.nodeName == "IMG") {
return;
}
var a = e.target;
while (a.nodeName != "A" && a.nodeName != "HTML") {
a = a.parentNode;
}
if (!a.href) {
return;
}
var movementX = e.pageX - this.currentPos.x;
var movementY = e.pageY - this.currentPos.y;
if (!movementX && !movementY) {
movementX = this.moveX;
movementY = this.moveY;
}
if (Math.abs(movementX) < Math.abs(movementY)) {
return;
}
e.preventDefault();
this.target = a;
this.init(e);
}
},
init: function(e){
this.startPos.x = e.pageX;
this.startPos.y = e.pageY;
this.multiSelect = e.ctrlKey;
var caretPos = document.caretPositionFromPoint(this.startPos.x - window.scrollX, this.startPos.y - window.scrollY);
if (!this.multiSelect) {
this.select.collapse(caretPos.offsetNode, caretPos.offset);
} else {
this.range = new Range();
this.range.setEnd(caretPos.offsetNode, caretPos.offset);
this.range.collapse();
this.select.addRange(this.range);
}
this.target.classList.add("force-select");
},
uninit: function(){
this.target.classList.remove("force-select");
this.target = null;
this.range = null;
this.multiSelect = false;
}
};
document.addEventListener("mousemove", force, false);
document.addEventListener("mouseup", force, false);
document.addEventListener("mousedown", force, false);
document.addEventListener("click", force, true);
document.addEventListener("dragstart", force, true);
document.addEventListener("dragend", force, true);
document.addEventListener("drag", force, true);
document.addEventListener("DOMContentLoaded", function(){
GM_addStyle(".force-select{ -moz-user-select: text!important; }");
}, false);