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edit.js
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edit.js
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/**
* created by bishen.org 2017/05/18
* 毕绅原创 微信weui内容编辑器
* https://github.com/bishen/wechat-editor
*/
var weEdit = {
id: '',
width: '574px',
height: '600px',
frm: {},
doc: {},
color: {},
command: '',
code: false,
textarea: {},
files: 0,
xhr: new XMLHttpRequest(),
buttons: [
'undo', 'h2', 'h3', 'p', 'img', 'vod', 'b', 'i', 'u', 's', 'l', 'c', 'r', 'h', 'color', 'bgcolor', 'code'
],
func: {
'undo': {
'icon': 'icon-undo-2',
'title': '撤消重做',
'method': function() {
weEdit.exec('undo');
}
},
'h2': {
'icon': 'icon-pilcrow',
'title': '章标题',
'method': function() {
weEdit.exec('formatBlock', 'H2');
}
},
'h3': {
'icon': 'icon-right-to-left',
'title': '节标题',
'method': function() {
weEdit.exec('formatBlock', 'H3');
}
},
'p': {
'icon': 'icon-paypal-2',
'title': '文字段落',
'method': function() {
weEdit.exec('formatBlock', 'P');
}
},
'img': {
'icon': 'icon-picture',
'title': '插入图片',
'method': function() {
var fl = document.createElement('input');
fl.type = 'file';
fl.click();
fl.onchange = function() {
var fd = new FormData();
fd.append("file", this.files[0]);
if (this.files[0].type.indexOf("image") == -1) {
alert('只能上传jpg/png/gif');
} else {
if (this.files[0].size > 2048000) {
alert('微信限制上传图片不能超过2M');
} else {
weEdit.files++;
weEdit.exec('insertHTML', '<img src="/images/loading.gif" id="file' + weEdit.files + '">');
weEdit.upImage(weEdit.files, fd, this.files[0].size);
}
}
}
}
},
'vod': {
'icon': 'icon-play',
'title': '插入视频',
'method': function() {
// 功能如同力片
alert('还未开发此功能');
}
},
'b': {
'icon': 'icon-bold',
'title': '加粗',
'method': function(e) {
weEdit.exec('bold');
}
},
'i': {
'icon': 'icon-italic',
'title': '倾斜',
'method': function() {
weEdit.exec('italic');
}
},
'u': {
'icon': 'icon-underline',
'title': '下划线',
'method': function() {
weEdit.exec('underline');
}
},
's': {
'icon': 'icon-strikethrough',
'title': '删除线',
'method': function() {
weEdit.exec('strikeThrough');
}
},
'l': {
'icon': 'icon-paragraph-left-2',
'title': '左对齐',
'method': function() {
weEdit.exec('justifyLeft');
}
},
'c': {
'icon': 'icon-paragraph-center-2',
'title': '居中对齐',
'method': function() {
weEdit.exec('justifyCenter');
}
},
'r': {
'icon': 'icon-paragraph-right-2',
'title': '右对齐',
'method': function() {
weEdit.exec('justifyRight');
}
},
'h': {
'icon': 'icon-minus-4',
'title': '插入水平线',
'method': function() {
weEdit.exec('insertHorizontalRule');
}
},
'color': {
'icon': 'icon-chart-3',
'title': '字体颜色',
'method': function() {
weEdit.command = 'foreColor';
weEdit.color.click();
}
},
'bgcolor': {
'icon': 'icon-chart-alt',
'title': '背景颜色',
'method': function() {
weEdit.command = 'hiliteColor';
weEdit.color.click();
}
},
'code': {
'icon': 'icon-code-2',
'title': '源码',
'method': function() {
if (weEdit.code) {
weEdit.textarea.style.display = 'none';
weEdit.doc.body.innerHTML = weEdit.textarea.value;
} else {
weEdit.textarea.style.display = '';
}
weEdit.code = !weEdit.code;
}
}
},
exec: function(aCommandName, aValueArgument) {
if (aValueArgument)
weEdit.doc.execCommand(aCommandName, false, aValueArgument);
else
weEdit.doc.execCommand(aCommandName, false);
weEdit.setDate();
},
setDate: function() {
weEdit.textarea.value = weEdit.doc.body.innerHTML;
},
init: function() {
this.id = document.querySelector(this.id);
if (this.id) {
var style = document.createElement('style');
var tools = document.createElement('div');
tools.className = 'weButtons';
style.type = 'text/css';
style.innerHTML = '.weButtons{padding:0;font-size:16px}';
style.innerHTML += '.weButtons i{margin:0 6px 4px 0;padding:5px;border-radius:4px;display:inline-block;border:1px solid #ccc}';
style.innerHTML += ".weButtons i:hover{background-color:#03C;cursor:pointer;color:#fff}";
this.color = document.createElement('input');
this.color.type = 'color';
this.color.onchange = function() {
weEdit.exec(weEdit.command, this.value);
};
this.textarea = document.createElement('textarea');
this.textarea.style.cssText = "display:none;position:absolute;z-index:2;border:1px solid #ccc;padding:10px;width:" + this.width + ";height:" + this.height;
this.frm = document.createElement('iframe');
this.frm.style.cssText = "width:" + this.width + ";height:" + this.height + ";border:2px solid #ccc";
this.id.appendChild(style);
this.id.appendChild(tools);
this.id.appendChild(this.textarea);
this.id.appendChild(this.frm);
this.doc = this.frm.contentWindow.document;
this.doc.designMode = "on";
this.doc.write('<head><style type="text/css">html { -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%;}');
this.doc.write('body { line-height: 1.6; font-family: -apple-system-font, "Helvetica Neue", sans-serif;}');
this.doc.write('* { margin: 0; padding: 0;}::selection{background-color:#FF0080;color:#fff}');
this.doc.write('.weui-article {padding: 20px 15px;font-size:14px;}');
this.doc.write('.weui-article section {margin-bottom: 1.5em;}');
this.doc.write('.weui-article h1 {font-size: 18px;font-weight: 400;margin-bottom: .9em;}');
this.doc.write('.weui-article h2 {font-size: 16px;font-weight: 400;margin-bottom: .34em;}');
this.doc.write('.weui-article h3 {font-weight: 400;font-size: 15px;margin-bottom: .34em;}');
this.doc.write('.weui-article * {max-width: 100%;box-sizing: border-box;word-wrap: break-word;}');
this.doc.write('.weui-article p {margin: 0 0 .8em;}table{width:100%}td,th{border:1px solid #CCC}');
this.doc.write('</style></head > ');
this.doc.close();
this.doc.body.className = 'weui-article';
this.doc.body.focus();
this.doc.body.onkeyup = function(e) {
if (e.keyCode == 13) {
this.innerHTML = this.innerHTML.replace(/<div>/ig, '<p>').replace(/<\/div>/ig, '</p>');
var range = weEdit.doc.getSelection(); //创建range
range.selectAllChildren(weEdit.doc.body); //range 选择obj下所有子内容
range.collapseToEnd(); //光标移至最后
};
weEdit.setDate();
};
weEdit.doc.addEventListener('paste', function(e) {
var html = e.clipboardData.getData('text/html');
e.preventDefault();
var start = html.indexOf('<!--StartFragment-->');
start = start == -1 ? 0 : start + 20;
html = html.substring(start, html.lastIndexOf('<!--EndFragment-->'));
html = html.replace(/<img[^>]*?(src="[^"]*?")[^>]*?>/ig, '<\\--img $1 />'); // 微信里是不可以包含外部图片地址的
html = html.replace(/<(\w+)[^>]*>/ig, '<$1>').replace(/<\\--img/g, '<img');
html = html.replace(/<div>/ig, '<p>').replace(/<code>/ig, '<p>');
html = html.replace(/<\/div>/ig, '</p>').replace(/<\/code>/ig, '</p>');
html = html.replace(/<span>/ig, '').replace(/<\/span>/ig, '');
html = html.replace(/<p><\/p>/ig, '').replace(/(<p>){2,}/ig, '<p>').replace(/(<\/p>){2,}/ig, '</p>');
weEdit.exec('insertHtml', html);
});
for (var i = 0; i < this.buttons.length; i++) {
if (this.func[this.buttons[i]]) {
var obj = this.func[this.buttons[i]];
var but = document.createElement('i');
but.className = obj.icon;
but.title = obj.title;
but.onclick = obj.method;
tools.appendChild(but);
}
}
}
},
loadScript: function(url) {
var script = document.createElement("script");
script.type = "text/javascript";
script.src = url;
document.getElementsByTagName("head")[0].appendChild(script);
},
upImage: function(fs, fd, sz) {
weEdit.xhr.upload.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var percentComplete = Math.round(evt.loaded * 100 / evt.total);
console.log(percentComplete.toString() + '%');
}
}, false);
weEdit.xhr.addEventListener("load", function(evt) {
var str = evt.target.responseText;
if (str == 'no') {
alert('上传失败！');
} else {
// 发送至微信，添加永久素材
weEdit.loadScript('/json/wechat/add_material?f=' + fs + '&tp=image&sz=' + sz + '&fn=success&url=' + str);
}
}, false);
weEdit.xhr.addEventListener("error", function() {
alert('上传失败！');
}, false);
weEdit.xhr.open("POST", "/manager/upfile");
weEdit.xhr.send(fd);
}
};
var we = weEdit;
we.id = '#edit';
we.init();
// 上传成功回调，请将当前网站域名添加至微信后台的授权域名里，否则无法显示出图片
function success(fs, url) {
if (url == '') {
alert('上传失败！');
we.exec('undo');
} else {
we.doc.getElementById('file' + fs).src = url;
we.setDate();
}
}