compass-web/v2.5/target/vendor/angular-dragdrop/draganddrop.js
Ming He 1ea9bfbae8 add compiled bundle
Change-Id: I424c1d49388bbcc6155f0d4e632c0754d4973e7d
2015-12-16 17:11:06 -08:00

338 lines
12 KiB
JavaScript

/**
* Created with IntelliJ IDEA.
* User: Ganaraj.Pr
* Date: 11/10/13
* Time: 11:27
* To change this template use File | Settings | File Templates.
*/
(function(){
function isDnDsSupported(){
return 'draggable' in document.createElement("span");
}
if(!isDnDsSupported()){
return;
}
if (window.jQuery && (-1 == window.jQuery.event.props.indexOf("dataTransfer"))) {
window.jQuery.event.props.push("dataTransfer");
}
var currentData;
angular.module("ngDragDrop",[])
.directive("uiDraggable", [
'$parse',
'$rootScope',
'$dragImage',
function ($parse, $rootScope, $dragImage) {
return function (scope, element, attrs) {
var dragData = "",
isDragHandleUsed = false,
dragHandleClass,
dragTarget;
element.attr("draggable", false);
attrs.$observe("uiDraggable", function (newValue) {
if(newValue){
element.attr("draggable", newValue);
}
else{
element.removeAttr("draggable");
}
});
if (attrs.drag) {
scope.$watch(attrs.drag, function (newValue) {
dragData = newValue || "";
});
}
if (angular.isString(attrs.dragHandleClass)) {
isDragHandleUsed = true;
dragHandleClass = attrs.dragHandleClass.trim() || "drag-handle";
element.bind("mousedown", function (e) {
dragTarget = e.target;
});
}
function dragendHandler(e) {
setTimeout(function() {
element.unbind('$destroy', dragendHandler);
}, 0);
var sendChannel = attrs.dragChannel || "defaultchannel";
$rootScope.$broadcast("ANGULAR_DRAG_END", sendChannel);
if (e.dataTransfer && e.dataTransfer.dropEffect !== "none") {
if (attrs.onDropSuccess) {
var fn = $parse(attrs.onDropSuccess);
scope.$apply(function () {
fn(scope, {$event: e});
});
} else {
if (attrs.onDropFailure) {
var fn = $parse(attrs.onDropFailure);
scope.$apply(function () {
fn(scope, {$event: e});
});
}
}
}
}
element.bind("dragend", dragendHandler);
element.bind("dragstart", function (e) {
var isDragAllowed = !isDragHandleUsed || dragTarget.classList.contains(dragHandleClass);
if (isDragAllowed) {
var sendChannel = attrs.dragChannel || "defaultchannel";
var sendData = angular.toJson({ data: dragData, channel: sendChannel });
var dragImage = attrs.dragImage || null;
element.bind('$destroy', dragendHandler);
if (dragImage) {
var dragImageFn = $parse(attrs.dragImage);
scope.$apply(function() {
var dragImageParameters = dragImageFn(scope, {$event: e});
if (dragImageParameters) {
if (angular.isString(dragImageParameters)) {
dragImageParameters = $dragImage.generate(dragImageParameters);
}
if (dragImageParameters.image) {
var xOffset = dragImageParameters.xOffset || 0,
yOffset = dragImageParameters.yOffset || 0;
e.dataTransfer.setDragImage(dragImageParameters.image, xOffset, yOffset);
}
}
});
}
e.dataTransfer.setData("Text", sendData);
currentData = angular.fromJson(sendData);
e.dataTransfer.effectAllowed = "copyMove";
$rootScope.$broadcast("ANGULAR_DRAG_START", sendChannel);
}
else {
e.preventDefault();
}
});
};
}
])
.directive("uiOnDrop", [
'$parse',
'$rootScope',
function ($parse, $rootScope) {
return function (scope, element, attr) {
var dragging = 0; //Ref. http://stackoverflow.com/a/10906204
var dropChannel = attr.dropChannel || "defaultchannel" ;
var dragChannel = "";
var dragEnterClass = attr.dragEnterClass || "on-drag-enter";
var dragHoverClass = attr.dragHoverClass || "on-drag-hover";
function onDragOver(e) {
if (e.preventDefault) {
e.preventDefault(); // Necessary. Allows us to drop.
}
if (e.stopPropagation) {
e.stopPropagation();
}
e.dataTransfer.dropEffect = e.shiftKey ? 'copy' : 'move';
return false;
}
function onDragLeave(e) {
dragging--;
if (dragging == 0) {
element.removeClass(dragHoverClass);
}
}
function onDragEnter(e) {
dragging++;
$rootScope.$broadcast("ANGULAR_HOVER", dragChannel);
element.addClass(dragHoverClass);
}
function onDrop(e) {
if (e.preventDefault) {
e.preventDefault(); // Necessary. Allows us to drop.
}
if (e.stopPropagation) {
e.stopPropagation(); // Necessary. Allows us to drop.
}
var sendData = e.dataTransfer.getData("Text");
sendData = angular.fromJson(sendData);
var fn = $parse(attr.uiOnDrop);
scope.$apply(function () {
fn(scope, {$data: sendData.data, $event: e, $channel: sendData.channel});
});
element.removeClass(dragEnterClass);
dragging = 0;
}
function isDragChannelAccepted(dragChannel, dropChannel) {
if (dropChannel === "*") {
return true;
}
var channelMatchPattern = new RegExp("(\\s|[,])+(" + dragChannel + ")(\\s|[,])+", "i");
return channelMatchPattern.test("," + dropChannel + ",");
}
function preventNativeDnD(e) {
if (e.preventDefault) {
e.preventDefault();
}
if (e.stopPropagation) {
e.stopPropagation();
}
e.dataTransfer.dropEffect = "none";
return false;
}
var deregisterDragStart = $rootScope.$on("ANGULAR_DRAG_START", function (event, channel) {
dragChannel = channel;
if (isDragChannelAccepted(channel, dropChannel)) {
if (attr.dropValidate) {
var validateFn = $parse(attr.dropValidate);
var valid = validateFn(scope, {$data: currentData.data, $channel: currentData.channel});
if (!valid) {
element.bind("dragover", preventNativeDnD);
element.bind("dragenter", preventNativeDnD);
element.bind("dragleave", preventNativeDnD);
element.bind("drop", preventNativeDnD);
return;
}
}
element.bind("dragover", onDragOver);
element.bind("dragenter", onDragEnter);
element.bind("dragleave", onDragLeave);
element.bind("drop", onDrop);
element.addClass(dragEnterClass);
}
else {
element.bind("dragover", preventNativeDnD);
element.bind("dragenter", preventNativeDnD);
element.bind("dragleave", preventNativeDnD);
element.bind("drop", preventNativeDnD);
}
});
var deregisterDragEnd = $rootScope.$on("ANGULAR_DRAG_END", function (e, channel) {
dragChannel = "";
if (isDragChannelAccepted(channel, dropChannel)) {
element.unbind("dragover", onDragOver);
element.unbind("dragenter", onDragEnter);
element.unbind("dragleave", onDragLeave);
element.unbind("drop", onDrop);
element.removeClass(dragHoverClass);
element.removeClass(dragEnterClass);
}
element.unbind("dragover", preventNativeDnD);
element.unbind("dragenter", preventNativeDnD);
element.unbind("dragleave", preventNativeDnD);
element.unbind("drop", preventNativeDnD);
});
var deregisterDragHover = $rootScope.$on("ANGULAR_HOVER", function (e, channel) {
if (isDragChannelAccepted(channel, dropChannel)) {
element.removeClass(dragHoverClass);
}
});
scope.$on('$destroy', function () {
deregisterDragStart();
deregisterDragEnd();
deregisterDragHover();
});
attr.$observe('dropChannel', function (value) {
if (value) {
dropChannel = value;
}
});
};
}
])
.constant("$dragImageConfig", {
height: 20,
width: 200,
padding: 10,
font: 'bold 11px Arial',
fontColor: '#eee8d5',
backgroundColor: '#93a1a1',
xOffset: 0,
yOffset: 0
})
.service("$dragImage", [
'$dragImageConfig',
function (defaultConfig) {
var ELLIPSIS = '…';
function fitString(canvas, text, config) {
var width = canvas.measureText(text).width;
if (width < config.width) {
return text;
}
while (width + config.padding > config.width) {
text = text.substring(0, text.length - 1);
width = canvas.measureText(text + ELLIPSIS).width;
}
return text + ELLIPSIS;
};
this.generate = function (text, options) {
var config = angular.extend({}, defaultConfig, options || {});
var el = document.createElement('canvas');
el.height = config.height;
el.width = config.width;
var canvas = el.getContext('2d');
canvas.fillStyle = config.backgroundColor;
canvas.fillRect(0, 0, config.width, config.height);
canvas.font = config.font;
canvas.fillStyle = config.fontColor;
var title = fitString(canvas, text, config);
canvas.fillText(title, 4, config.padding + 4);
var image = new Image();
image.src = el.toDataURL();
return {
image: image,
xOffset: config.xOffset,
yOffset: config.yOffset
};
}
}
]);
}());