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