contented/static/sdk.js

451 lines
12 KiB
JavaScript

;
//
var contented = (function() {
"use strict";
// @ref https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob
if (!HTMLCanvasElement.prototype.toBlob) {
Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {
value: function (callback, type, quality) {
var binStr = atob( this.toDataURL(type, quality).split(',')[1] ),
len = binStr.length,
arr = new Uint8Array(len);
for (var i = 0; i < len; i++ ) {
arr[i] = binStr.charCodeAt(i);
}
callback( new Blob( [arr], {type: type || 'image/png'} ) );
}
});
}
var getCurrentScriptPath = function () {
// Determine current script path
// @ref https://stackoverflow.com/a/26023176
var scripts = document.querySelectorAll('script[src]');
var currentScript = scripts[scripts.length - 1].src;
var currentScriptChunks = currentScript.split('/');
var currentScriptFile = currentScriptChunks[currentScriptChunks.length - 1];
return currentScript.replace(currentScriptFile, '');
};
var currentScriptPath = getCurrentScriptPath();
var baseURL = currentScriptPath.replace('sdk.js', '');
return {
"loaded": false,
"baseURL": baseURL,
"__preInit": [],
/**
* initArea shows the contented upload widget over the top of a target DOM element.
*
* @param any element Drop target (string selector / DOMElement / jQuery)
* @param Function onUploaded Called with an array of upload IDs
* @param Function onClose Called when the widget is being destroyed
*/
"init": function(elementSelector, onUploaded, onClose) {
contented.__preInit.push([elementSelector, onUploaded, onClose]);
},
/**
* supportsDrop returns whether drag-and-drop is supported by this browser.
*
* @return bool
*/
"supportsDrop": function() {
return ('ondrop' in window && 'FormData' in window && 'FileReader' in window);
},
"getPreviewURL": function(id) {
return baseURL + "get/" + id; // n.b. there's no better preview URL yet
},
"getDownloadURL": function(id) {
return baseURL + "get/" + id;
},
"getInfoJSONURL": function(id) {
return baseURL + "info/" + id;
}
};
})();
;(function() {
"use strict";
var loadScript = function(url, onLoad) {
var script = document.createElement('script');
script.onload = onLoad;
script.src = url;
document.head.appendChild(script);
};
var loadScripts = function(urls, onLoad) {
// load sequentially
var i = 0;
var loadNext = function() {
if (i === urls.length) {
onLoad();
return;
}
var url = urls[i];
i += 1;
loadScript(url, loadNext);
};
loadNext();
};
var formatBytes = function(bytes) {
var k = 1024, m = (1024*1024), g = (1024*1024*1024);
if (bytes < k) {
return bytes + " B";
} else if (bytes < m) {
return (bytes / k).toFixed(1) + " KiB";
} else if (bytes < g) {
return (bytes / m).toFixed(1) + " MiB";
} else {
return (bytes / g).toFixed(1) + " GiB";
}
};
// @ref https://stackoverflow.com/a/2117523
var guid = function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
};
var afterScriptsLoaded = function() {
var initArea = function (elementSelector, onUploaded, onClose) {
onUploaded = onUploaded || function () { };
onClose = onClose || function () { };
if ($(elementSelector).length != 1) {
return; // should only find one element
}
var element = $(elementSelector)[0];
// <input type="hidden" name="MAX_FILE_SIZE" value="` + ret.MaxUploadBytes + `" />
// Create a new div for ourselves on top of the existing area
$.get(contented.baseURL + "about", function (ret) {
var extraText = "";
if (ret.MaxUploadBytes > 0) {
extraText = " (max " + formatBytes(ret.MaxUploadBytes) + ")";
}
$.get(contented.baseURL + "widget.html", function (widgetHtml) {
var $f = $("<div>").html(widgetHtml);
$f.find(".contented-extratext").text(extraText);
// Tab buttons
var hasSetupDrawingBoardYet = false;
var setType = function (type) {
$f.find(".contented-upload-type").removeClass("contented-upload-type-active");
$f.find(".contented-upload-type[data-upload-type=" + type + "]").addClass("contented-upload-type-active");
$f.find(".contented-upload-if").removeClass("contented-active");
$f.find(".contented-if-" + type).addClass("contented-active");
if (type == "drag") {
enablePasteHandler();
} else {
disablePasteHandler();
}
if (type == "drawing" && !hasSetupDrawingBoardYet) {
setupDrawingBoard();
hasSetupDrawingBoardYet = true;
}
};
$f.find(".contented-upload-type").click(function () {
setType($(this).attr('data-upload-type'));
});
// Widget positioning
var $element = $(element);
var offset = $element.offset();
$f.css({
'position': 'absolute',
'left': offset.left + "px",
'top': offset.top + "px",
'width': $element.width() + "px",
'min-width': $element.width() + "px",
'max-width': $element.width() + "px",
'height': $element.height() + "px",
'min-height': $element.height() + "px",
'max-height': $element.height() + "px"
});
// Drag and drop support
$f.find('.contented').on('dragover dragenter', function (e) {
e.preventDefault();
e.stopPropagation();
$(this).addClass('is-dragging');
});
$f.find('.contented').on('dragleave dragend', function (e) {
e.preventDefault();
e.stopPropagation();
$(this).removeClass('is-dragging');
});
$f.find('.contented').on('drop', function (e) {
e.preventDefault();
e.stopPropagation();
handleUploadFrom(e.originalEvent.dataTransfer.files);
});
$f.find('.contented-file-upload').on('click', function(e) {
e.preventDefault();
e.stopPropagation();
handleUploadFrom($(".contented-file-selector")[0].files);
});
// Pastebin
$f.find('.contented-paste-upload').on('click', function(e) {
e.preventDefault();
e.stopPropagation();
var blob = new Blob([$(".contented-if-paste textarea").val()], {type : 'text/plain'});
handleUploadFrom([blob]);
});
// Ctrl+V uploads
var pasteHandler = function(e) {
e.preventDefault();
e.stopPropagation();
var items = (e.clipboardData || e.originalEvent.clipboardData).items;
var items_length = items.length;
var blobs = [];
var handled = 0;
var haveHandled = function() {
handled += 1;
if (handled == items_length) {
if (blobs.length > 0) {
handleUploadFrom( blobs );
} else {
// alert("Pasted 0 files");
}
}
};
for (var i = 0; i < items.length; ++i) {
var item = items[i];
var mimeType = item.type;
if (item.kind === 'file') {
blobs.push(item.getAsFile());
haveHandled();
} else if (item.kind === 'string') {
item.getAsString(function(s) {
blobs.push( new Blob([s], {type : mimeType}) );
haveHandled();
});
} else {
// file|string are the only supported types in
// all browsers at the time of writing
// Ignore future possibilities
haveHandled();
}
}
};
var enablePasteHandler = function() {
document.addEventListener('paste', pasteHandler);
};
var disablePasteHandler = function() {
document.removeEventListener('paste', pasteHandler);
};
// Embed in DOM, load default area
$("body").append($f);
if (!contented.supportsDrop()) {
setType('file');
} else {
setType('drag');
}
// Drawing board
var setupDrawingBoard = function() {
$("head").append(
'<link rel="stylesheet" type="text/css" href="' + contented.baseURL + 'drawingboard-0.4.6.min.css">'
);
var db_id = "contented-drawing-area-" + guid();
var $db = $("<div>").attr('id', db_id);
DrawingBoard.Control.ContentedUpload = DrawingBoard.Control.extend({
name: 'upload',
initialize: function() {
var $el = this.$el;
$el.append('<button class="contented-drawingboard-upload">Upload</button>');
$el.on('click', '.contented-drawingboard-upload', $.proxy(function(e) {
e.preventDefault();
e.stopPropagation();
$el.prop('disabled', true);
$el.text('Saving...');
$db.find("canvas")[0].toBlob(function(theBlob) {
handleUploadFrom([ theBlob ]);
});
}, this));
}
});
$db.css({
//'width': $f.find(".contented-content-area").width(),
'height': $f.find(".contented-content-area").height(),
'overflow': 'hidden'
});
$f.find(".contented-drawing-area").append($db);
var db = new DrawingBoard.Board(db_id, {
'controls': [
'Color',
'Size',
'DrawingMode',
'Navigation',
'ContentedUpload'
],
'controlsPosition': 'center',
'enlargeYourContainer': false,
'webStorage': false,
'droppable': false // don't mess with existing drop support
});
};
// Close button
var ourClose = function () {
$f.remove(); // remove from dom
disablePasteHandler();
onClose(); // upstream close
};
$f.find(".contented-close").click(function () {
ourClose();
})
// Progress bar
var setProgressCaption = function(message) {
$f.find(".contented-if-progress label").text(message);
};
var setProgressPercentage = function(frc) {
$f.find(".contented-progress-element").css('width', (frc * 100) + "%");
};
// Common upload handler
var handleUploadFrom = function(files) {
setProgressCaption("Uploading, please wait...");
setProgressPercentage(0);
setType("progress");
$f.find(".contented-upload-type-selector").hide();
$f.find(".contented").removeClass('is-dragging');
// Ajax uploader
var ajaxData = new FormData();
for (var i = 0; i < files.length; ++i) {
ajaxData.append("f", files[i]);
}
// ajax request
$.ajax({
url: contented.baseURL + "upload",
type: "POST",
data: ajaxData,
dataType: 'json', // response type
cache: false,
contentType: false,
processData: false,
xhr: function() {
var xhr = $.ajaxSettings.xhr();
xhr.upload.addEventListener(
'progress',
function(ev) {
if (ev.lengthComputable) {
setProgressCaption("Uploading (" + formatBytes(ev.loaded) + " / " + formatBytes(ev.total) + ")...");
setProgressPercentage(ev.total == 0 ? 0 : ev.loaded / ev.total);
}
},
false
);
return xhr;
},
complete: function () {
setProgressPercentage(1);
},
success: function (data) {
setProgressCaption("Upload completed successfully.");
onUploaded(data);
ourClose();
},
error: function () {
setProgressCaption("Upload failed!");
}
});
}
// .
});
});
}
// Update fields in global variable
contented.init = initArea;
contented.loaded = true;
// Call initArea for all pre-initialised elements
for (var i = 0; i < contented.__preInit.length; ++i) {
initArea(contented.__preInit[i][0], contented.__preInit[i][1], contented.__preInit[i][2]);
}
};
// Load scripts
var needScripts = [];
if (typeof jQuery === "undefined") {
needScripts.push(contented.baseURL + "jquery-1.12.4.min.js");
}
if (typeof DrawingBoard === "undefined") {
needScripts.push(contented.baseURL + "drawingboard-0.4.6.min.js");
}
loadScripts(needScripts, afterScriptsLoaded);
})()