svgedit/editor/extensions/ext-imagelib.js

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/*
* ext-imagelib.js
*
* Licensed under the MIT License
*
* Copyright(c) 2010 Alexis Deveria
*
*/
svgEditor.addExtension("imagelib", function() {
var uiStrings = svgEditor.uiStrings;
$.extend(uiStrings, {
imagelib: {
select_lib: 'Select an image library',
show_list: 'Show library list',
import_single: 'Import single',
import_multi: 'Import multiple',
open: 'Open as new document'
}
});
var img_libs = [{
name: 'Demo library (local)',
url: 'extensions/imagelib/index.html',
description: 'Demonstration library for SVG-edit on this server'
},
{
name: 'IAN Symbol Libraries',
url: 'http://ian.umces.edu/symbols/catalog/svgedit/album_chooser.php',
description: 'Free library of illustrations'
}
];
function closeBrowser() {
$('#imgbrowse_holder').hide();
}
function importImage(url) {
var newImage = svgCanvas.addSvgElementFromJson({
"element": "image",
"attr": {
"x": 0,
"y": 0,
"width": 0,
"height": 0,
"id": svgCanvas.getNextId(),
"style": "pointer-events:inherit"
}
});
svgCanvas.clearSelection();
svgCanvas.addToSelection([newImage]);
svgCanvas.setImageURL(url);
}
var mode = 's';
var multi_arr = [];
var cur_meta;
var tranfer_stopped = false;
var pending = {};
window.addEventListener("message", function(evt) {
// Receive postMessage data
var response = evt.data;
if(!response || typeof response !== "string") { // Todo: Should namespace postMessage API for this extension and filter out here
// Do nothing
return;
}
try { // This block can be removed if embedAPI moves away from a string to an object (if IE9 support not needed)
var res = JSON.parse(response);
if (res.namespace) { // Part of embedAPI communications
return;
}
}
catch (e) {}
var char1 = response.charAt(0);
var svg_str;
var img_str;
if(char1 != "{" && tranfer_stopped) {
tranfer_stopped = false;
return;
}
if(char1 == '|') {
var secondpos = response.indexOf('|', 1);
var id = response.substr(1, secondpos-1);
response = response.substr(secondpos+1);
char1 = response.charAt(0);
}
// Hide possible transfer dialog box
$('#dialog_box').hide();
switch (char1) {
case '{':
// Metadata
tranfer_stopped = false;
var cur_meta = JSON.parse(response);
pending[cur_meta.id] = cur_meta;
var name = (cur_meta.name || 'file');
var message = uiStrings.notification.retrieving.replace('%s', name);
if(mode != 'm') {
$.process_cancel(message, function() {
tranfer_stopped = true;
// Should a message be sent back to the frame?
$('#dialog_box').hide();
});
} else {
var entry = $('<div>' + message + '</div>').data('id', cur_meta.id);
preview.append(entry);
cur_meta.entry = entry;
}
return;
case '<':
svg_str = true;
break;
case 'd':
if(response.indexOf('data:image/svg+xml') === 0) {
var pre = 'data:image/svg+xml;base64,';
var src = response.substring(pre.length);
response = svgCanvas.Utils.decode64(src);
svg_str = true;
break;
} else if(response.indexOf('data:image/') === 0) {
img_str = true;
break;
}
// Else fall through
default:
// TODO: See if there's a way to base64 encode the binary data stream
// var str = 'data:;base64,' + svgCanvas.Utils.encode64(response, true);
// Assume it's raw image data
// importImage(str);
// Don't give warning as postMessage may have been used by something else
if(mode !== 'm') {
closeBrowser();
} else {
pending[id].entry.remove();
}
// $.alert('Unexpected data was returned: ' + response, function() {
// if(mode !== 'm') {
// closeBrowser();
// } else {
// pending[id].entry.remove();
// }
// });
return;
}
switch (mode) {
case 's':
// Import one
if(svg_str) {
svgCanvas.importSvgString(response);
} else if(img_str) {
importImage(response);
}
closeBrowser();
break;
case 'm':
// Import multiple
multi_arr.push([(svg_str ? 'svg' : 'img'), response]);
var cur_meta = pending[id];
if(svg_str) {
if(cur_meta && cur_meta.name) {
var title = cur_meta.name;
} else {
// Try to find a title
var xml = new DOMParser().parseFromString(response, 'text/xml').documentElement;
var title = $(xml).children('title').first().text() || '(SVG #' + response.length + ')';
}
if(cur_meta) {
preview.children().each(function() {
if($(this).data('id') == id) {
if(cur_meta.preview_url) {
$(this).html('<img src="' + cur_meta.preview_url + '">' + title);
} else {
$(this).text(title);
}
submit.removeAttr('disabled');
}
});
} else {
preview.append('<div>'+title+'</div>');
submit.removeAttr('disabled');
}
} else {
if(cur_meta && cur_meta.preview_url) {
var title = cur_meta.name || '';
}
if(cur_meta && cur_meta.preview_url) {
var entry = '<img src="' + cur_meta.preview_url + '">' + title;
} else {
var entry = '<img src="' + response + '">';
}
if(cur_meta) {
preview.children().each(function() {
if($(this).data('id') == id) {
$(this).html(entry);
submit.removeAttr('disabled');
}
});
} else {
preview.append($('<div>').append(entry));
submit.removeAttr('disabled');
}
}
break;
case 'o':
// Open
if(!svg_str) break;
svgEditor.openPrep(function(ok) {
if(!ok) return;
svgCanvas.clear();
svgCanvas.setSvgString(response);
// updateCanvas();
});
closeBrowser();
break;
}
}, true);
var preview, submit;
function toggleMulti(show) {
$('#lib_framewrap, #imglib_opts').css({right: (show ? 200 : 10)});
if(!preview) {
preview = $('<div id=imglib_preview>').css({
position: 'absolute',
top: 45,
right: 10,
width: 180,
bottom: 45,
background: '#fff',
overflow: 'auto'
}).insertAfter('#lib_framewrap');
submit = $('<button disabled>Import selected</button>')
.appendTo('#imgbrowse')
.on("click touchend", function() {
$.each(multi_arr, function(i) {
var type = this[0];
var data = this[1];
if(type == 'svg') {
svgCanvas.importSvgString(data);
} else {
importImage(data);
}
svgCanvas.moveSelectedElements(i*20, i*20, false);
});
preview.empty();
multi_arr = [];
$('#imgbrowse_holder').hide();
}).css({
position: 'absolute',
bottom: 10,
right: -10
});
}
preview.toggle(show);
submit.toggle(show);
}
function showBrowser() {
var browser = $('#imgbrowse');
if(!browser.length) {
$('<div id=imgbrowse_holder><div id=imgbrowse class=toolbar_button>\
</div></div>').insertAfter('#svg_docprops');
browser = $('#imgbrowse');
var all_libs = uiStrings.imagelib.select_lib;
var lib_opts = $('<ul id=imglib_opts>').appendTo(browser);
var frame = $('<iframe/>').prependTo(browser).hide().wrap('<div id=lib_framewrap>');
var header = $('<h1>').prependTo(browser).text(all_libs).css({
position: 'absolute',
top: 0,
left: 0,
width: '100%'
});
var cancel = $('<button>' + uiStrings.common.cancel + '</button>')
.appendTo(browser)
.on("click touchend", function() {
$('#imgbrowse_holder').hide();
}).css({
position: 'absolute',
top: 5,
right: -10
});
var leftBlock = $('<span>').css({position:'absolute',top:5,left:10}).appendTo(browser);
var back = $('<button hidden>' + uiStrings.imagelib.show_list + '</button>')
.appendTo(leftBlock)
.on("click touchend", function() {
frame.attr('src', 'about:blank').hide();
lib_opts.show();
header.text(all_libs);
back.hide();
}).css({
'margin-right': 5
}).hide();
var type = $('<select><option value=s>' +
uiStrings.imagelib.import_single + '</option><option value=m>' +
uiStrings.imagelib.import_multi + '</option><option value=o>' +
uiStrings.imagelib.open + '</option></select>').appendTo(leftBlock).change(function() {
mode = $(this).val();
switch (mode) {
case 's':
case 'o':
toggleMulti(false);
break;
case 'm':
// Import multiple
toggleMulti(true);
}
}).css({
'margin-top': 10
});
cancel.prepend($.getSvgIcon('cancel', true));
back.prepend($.getSvgIcon('tool_imagelib', true));
$.each(img_libs, function(i, opts) {
$('<li>')
.appendTo(lib_opts)
.text(opts.name)
.on("click touchend", function() {
frame.attr('src', opts.url).show();
header.text(opts.name);
lib_opts.hide();
back.show();
}).append('<span>' + opts.description + '</span>');
});
} else {
$('#imgbrowse_holder').show();
}
}
return {
svgicons: "extensions/ext-imagelib.xml",
buttons: [{
id: "tool_imagelib",
type: "app_menu", // _flyout
position: 4,
title: "Image library",
events: {
"mouseup": showBrowser
}
}],
callback: function() {
$('<style>').text('\
#imgbrowse_holder {\
position: absolute;\
top: 0;\
left: 0;\
width: 100%;\
height: 100%;\
background-color: rgba(0, 0, 0, .5);\
z-index: 5;\
}\
\
#imgbrowse {\
position: absolute;\
top: 25px;\
left: 25px;\
right: 25px;\
bottom: 25px;\
min-width: 300px;\
min-height: 200px;\
background: #B0B0B0;\
border: 1px outset #777;\
}\
#imgbrowse h1 {\
font-size: 20px;\
margin: .4em;\
text-align: center;\
}\
#lib_framewrap,\
#imgbrowse > ul {\
position: absolute;\
top: 45px;\
left: 10px;\
right: 10px;\
bottom: 10px;\
background: white;\
margin: 0;\
padding: 0;\
}\
#imgbrowse > ul {\
overflow: auto;\
}\
#imgbrowse > div {\
border: 1px solid #666;\
}\
#imglib_preview > div {\
padding: 5px;\
font-size: 12px;\
}\
#imglib_preview img {\
display: block;\
margin: 0 auto;\
max-height: 100px;\
}\
#imgbrowse li {\
list-style: none;\
padding: .5em;\
background: #E8E8E8;\
border-bottom: 1px solid #B0B0B0;\
line-height: 1.2em;\
font-style: sans-serif;\
}\
#imgbrowse li > span {\
color: #666;\
font-size: 15px;\
display: block;\
}\
#imgbrowse li:hover {\
background: #FFC;\
cursor: pointer;\
}\
#imgbrowse iframe {\
width: 100%;\
height: 100%;\
border: 0;\
}\
').appendTo('head');
}
}
});