如何将editor.md的图片上传改成七牛?

之前的编辑器一直用的是simditor, 但是问题也不少, 之后觉得换成markdown编辑器, 首选当然就是editor.md, 主要原因就是界面美观, 功能全面...

但是editor.md问题也有, 比如图片上传, 不知道为什么作者会用那么蛋疼的表单上传, 难道只是为了兼容IE8? 看了github上的维护时间, 最后一次维护差不多半年了, 想让作者来改, 可能性是不大了, 那么就只能自己来了...

editor.md的图片上传是以插件的形式存在的, 文件在./plugins/image-dialog/image-dialog.js, 我们就拿这个文件开刀.

另外, editor.md添加图片后, 不设置alt, 会自动跳到第二行, 只需要把cm.setCursor(cursor.line, cursor.ch + 2)注释了即可, 没有搞明白作者这段代码的用意是什么...

exports.fn.imageDialog = function () {
    var cm = this.cm
    var lang = this.lang
    var editor = this.editor
    var settings = this.settings
    var cursor = cm.getCursor()
    var selection = cm.getSelection()
    var imageLang = lang.dialog.image
    var classPrefix = this.classPrefix
    var iframeName = classPrefix + 'image-iframe'
    var dialogName = classPrefix + pluginName,
        dialog
    cm.focus()
    var loading = function (show) {
        var _loading = dialog.find('.' + classPrefix + 'dialog-mask')
        _loading[(show) ? 'show' : 'hide']()
    }
    if (editor.find('.' + dialogName).length < 1) {
        var guid = new Date().getTime()
        var action = settings.imageUploadURL + (settings.imageUploadURL.indexOf('?') >= 0 ? '&' : '?') + 'guid=' + guid
        if (settings.crossDomainUpload) {
            action += '&callback=' + settings.uploadCallbackURL + '&dialog_id=editormd-image-dialog-' + guid
        }
        var dialogContent = ((settings.imageUpload) ? '<form action="' + action + '" id="images-upload" method="post" enctype="multipart/form-data" class="' + classPrefix + 'form">' : '<div class="' + classPrefix + 'form">') +
            '<label>' + imageLang.url + '</label>' +
            '<input type="text" data-url />' + (function () {
                return (settings.imageUpload) ? '<div class="' + classPrefix + 'file-input">' +
                '<input type="file" id="file" name="file" accept="image/*" multiple />' +
                '<input type="submit" value="' + imageLang.uploadButton + '" />' +
                '</div>' : ''
            })() +
            '<br/>' +
            '<label>' + imageLang.alt + '</label>' +
            '<input type="text" value="' + selection + '" data-alt />' +
            '<br/>' +
            '<label>' + imageLang.link + '</label>' +
            '<input type="text" value="http://" data-link />' +
            '<br/>' +
            ((settings.imageUpload) ? '</form>' : '</div>')
        dialog = this.createDialog({
            title: imageLang.title,
            width: (settings.imageUpload) ? 465 : 380,
            height: 254,
            name: dialogName,
            content: dialogContent,
            mask: settings.dialogShowMask,
            drag: settings.dialogDraggable,
            lockScreen: settings.dialogLockScreen,
            maskStyle: {
                opacity: settings.dialogMaskOpacity,
                backgroundColor: settings.dialogMaskBgColor
            },
            buttons: {
                enter: [lang.buttons.enter, function () {
                    var url = this.find('[data-url]').val()
                    var alt = this.find('[data-alt]').val()
                    var link = this.find('[data-link]').val()
                    if (url === '') {
                        alert(imageLang.imageURLEmpty)
                        return false
                    }
                    var altAttr = (alt !== '') ? ' "' + alt + '"' : ''
                    var arr_url = url.split('$$')
                    var text = ''
                    for (var i = 0, length = arr_url.length; i < length; i++) {
                        if (link === '' || link === 'http://') {
                            text = text + '![' + alt + '](' + arr_url[i] + altAttr + ')\r\n\r\n'
                        } else {
                            text = text + '[![' + alt + '](' + arr_url[i] + altAttr + ')](' + link + altAttr + ')\r\n\r\n'
                        }
                    }
                    cm.replaceSelection(text)
                    if (alt === '') {
                        // cm.setCursor(cursor.line, cursor.ch + 2)
                    }
                    this.hide().lockScreen(false).hideMask()
                    return false
                }],
                cancel: [lang.buttons.cancel, function () {
                    this.hide().lockScreen(false).hideMask()
                    return false
                }]
            }
        })
        dialog.attr('id', classPrefix + 'image-dialog-' + guid)
        if (!settings.imageUpload) {
            return
        }
        var Qiniu_upload = function(files, length, i) {
            if (length > i) {
                var formdata = new FormData()
                formdata.append('file', files[i])
                formdata.append('key', new Date().getTime() + '.jpg')
                formdata.append('token', '七牛账号对应的token')
                $.ajax({
                    type: 'POST',
                    url: 'http://up.qiniu.com/',
                    data: formdata,
                    dataType: 'json',
                    contentType: false,
                    processData: false
                }).then(function(json) {
                    var oldurl = $('[data-url]').val()
                    if (oldurl === '') {
                        $('[data-url]').val('七牛图片服务器的域名/' + json.key)
                    } else {
                        oldurl = oldurl + '$$七牛图片服务器的域名/' + json.key
                        $('[data-url]').val(oldurl)
                    }
                    i++
                    Qiniu_upload(files, length, i)
                }, function (err) {
                    console.log(err)
                })
            } else {
                $('[name="file"]').val('')
                loading(false)
            }
        }
        var submitHandler = function() {
            var files = $('[name="file"]')[0].files
            if (files.length > 0) {
                Qiniu_upload(files, files.length, 0)
            }
            return false
        }
        var fileInput = dialog.find('[name="file"]')
        fileInput.off('change').on('change', function() {
            var fileName = fileInput.val()
            var isImage = new RegExp('(\\.(' + settings.imageFormats.join('|') + '))$') // /(\.(webp|jpg|jpeg|gif|bmp|png))$/
            if (fileName === '') {
                alert(imageLang.uploadFileEmpty)
                return false
            }
            if (!isImage.test(fileName)) {
                alert(imageLang.formatNotAllowed + settings.imageFormats.join(', '))
                return false
            }
            loading(true)
            dialog.find('[type="submit"]').off('click').on('click', submitHandler).trigger('click')
        })
    }
    dialog = editor.find('.' + dialogName)
    dialog.find('[type="text"]').val('')
    dialog.find('[type="file"]').val('')
    dialog.find('[data-link]').val('http://')
    this.dialogShowMask(dialog)
    this.dialogLockScreen()
    dialog.show()
}