fixed base64-encoded image is no

项目中使用 http://github.com/mindmup/bootstrap-wysiwyg 作为邮件内容模版的编辑器,在国内邮箱网页端查看html格式的邮件均无问题,但是在gmail中却出现图片显示不了的问题,谷嫂之后,发现

base64 encoded image is not showing in gmail 的问题由来已久

想着换个编辑器,通读bootstrap-wysiwyg代码后发现,其实修改也很简单,替换下内置函数即可,索性操刀进行修改:

/* http://github.com/mindmup/bootstrap-wysiwyg */
/*global jQuery, $, FileReader*/
/*jslint browser:true*/
(function ($) {
    'use strict';
    
    var readFileIntoDataUrl = function (fileInfo) {
        var loader = $.Deferred(),
            fReader = new FileReader();
        fReader.onload = function (e) {
            loader.resolve(e.target.result);
        };
        fReader.onerror = loader.reject;
        fReader.onprogress = loader.notify;
        fReader.readAsDataURL(fileInfo);
        return loader.promise();
    };

    var uploadFile = function (fileInfo) {
        var form = new FormData();
        form.append('xtype', 'emails');
        form.append('file', fileInfo);
        var loader = $.Deferred();
        M.loadingStart('Uploading, please wait a moment ..');

        $.ajax({
            type: "POST",
            url: '/ajax/file/upload',
            data: form,
            processData: false,
            contentType: false,
            dataType: "json",
            complete: function (xhr, status, et) {
                M.loadingStop();
            },
            error: function (xhr, status, et) {
                console.log(status, et);
            },
            success: function(res){
                loader.resolve(res);
            }
        });
            
            return loader.promise();
    }; 


    $.fn.cleanHtml = function () {
        var html = $(this).html();
        return html && html.replace(/(<br>|\s|<div><br><\/div>|&nbsp;)*$/, '');
    };
    $.fn.wysiwyg = function (userOptions) {
        var editor = this,
            selectedRange,
            options,
            toolbarBtnSelector,
            updateToolbar = function () {
                if (options.activeToolbarClass) {
                    $(options.toolbarSelector).find(toolbarBtnSelector).each(function () {
                        var command = $(this).data(options.commandRole);
                        if (document.queryCommandState(command)) {
                            $(this).addClass(options.activeToolbarClass);
                        } else {
                            $(this).removeClass(options.activeToolbarClass);
                        }
                    });
                }
            },
            execCommand = function (commandWithArgs, valueArg) {
                var commandArr = commandWithArgs.split(' '),
                    command = commandArr.shift(),
                    args = commandArr.join(' ') + (valueArg || '');
                document.execCommand(command, 0, args);
                updateToolbar();
            },
            bindHotkeys = function (hotKeys) {
                $.each(hotKeys, function (hotkey, command) {
                    editor.keydown(hotkey, function (e) {
                        if (editor.attr('contenteditable') && editor.is(':visible')) {
                            e.preventDefault();
                            e.stopPropagation();
                            execCommand(command);
                        }
                    }).keyup(hotkey, function (e) {
                        if (editor.attr('contenteditable') && editor.is(':visible')) {
                            e.preventDefault();
                            e.stopPropagation();
                        }
                    });
                });
            },
            getCurrentRange = function () {
                var sel = window.getSelection();
                if (sel.getRangeAt && sel.rangeCount) {
                    return sel.getRangeAt(0);
                }
            },
            saveSelection = function () {
                selectedRange = getCurrentRange();
            },
            restoreSelection = function () {
                var selection = window.getSelection();
                if (selectedRange) {
                    try {
                        selection.removeAllRanges();
                    } catch (ex) {
                        document.body.createTextRange().select();
                        document.selection.empty();
                    }
                    selection.addRange(selectedRange);
                }
            },
            insertFiles = function (files) {
                editor.focus();
                $.each(files, function (idx, fileInfo) {
                    if (/^image\//.test(fileInfo.type)) {
                        /*
                        POST /ajax/file/upload
                        Content-Disposition: form-data; name="file"; filename=
                        success: 
                        {"link":"http:\/\/me.co\/images\/\/bsfiles\/24-1ff1\/sm\/eac.jpeg"}
                        failed:
                        {"error": "error msg"}
                         */
                        $.when(uploadFile(fileInfo)).done(function(res){
                            console.warn(res)
                            if (res.error) {
                                alert(res.error);
                            }else {
                                execCommand('insertimage', res.link);
                            }

                        }).fail(function (e) {
                            options.fileUploadError("file-reader", e);
                        });

                        // $.when(readFileIntoDataUrl(fileInfo)).done(function (dataUrl) {
                            // 调用
                            // execCommand('insertimage', dataUrl);
                        // }).fail(function (e) {
                        //  options.fileUploadError("file-reader", e);
                        // });
                    } else {
                        options.fileUploadError("unsupported-file-type", fileInfo.type);
                    }
                });
            },
            markSelection = function (input, color) {
                restoreSelection();
                if (document.queryCommandSupported('hiliteColor')) {
                    document.execCommand('hiliteColor', 0, color || 'transparent');
                }
                saveSelection();
                input.data(options.selectionMarker, color);
            },
            bindToolbar = function (toolbar, options) {
                toolbar.find(toolbarBtnSelector).click(function () {
                    restoreSelection();
                    editor.focus();
                    execCommand($(this).data(options.commandRole));
                    saveSelection();
                });
                toolbar.find('[data-toggle=dropdown]').click(restoreSelection);

                toolbar.find('input[type=text][data-' + options.commandRole + ']').on('webkitspeechchange change', function () {
                    var newValue = this.value; /* ugly but prevents fake double-calls due to selection restoration */
                    this.value = '';
                    restoreSelection();
                    if (newValue) {
                        editor.focus();
                        execCommand($(this).data(options.commandRole), newValue);
                    }
                    saveSelection();
                }).on('focus', function () {
                    var input = $(this);
                    if (!input.data(options.selectionMarker)) {
                        markSelection(input, options.selectionColor);
                        input.focus();
                    }
                }).on('blur', function () {
                    var input = $(this);
                    if (input.data(options.selectionMarker)) {
                        markSelection(input, false);
                    }
                });

                toolbar.find('a.salution-text').click(function(){
                    restoreSelection();

                    editor.focus();

                    execCommand('insertText', $(this).attr('data-text'));

                    saveSelection();
                });

                toolbar.find('input[type=file][data-' + options.commandRole + ']').change(function () {
                    restoreSelection();
                    if (this.type === 'file' && this.files && this.files.length > 0) {
                        insertFiles(this.files);
                    }
                    saveSelection();
                    this.value = '';
                });
            },
            initFileDrops = function () {
                editor.on('dragenter dragover', false)
                    .on('drop', function (e) {
                        var dataTransfer = e.originalEvent.dataTransfer;
                        e.stopPropagation();
                        e.preventDefault();
                        if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
                            insertFiles(dataTransfer.files);
                        }
                    });
            };
        options = $.extend({}, $.fn.wysiwyg.defaults, userOptions);
        toolbarBtnSelector = 'a[data-' + options.commandRole + '],button[data-' + options.commandRole + '],input[type=button][data-' + options.commandRole + ']';
        bindHotkeys(options.hotKeys);
        if (options.dragAndDropImages) {
            initFileDrops();
        }
        bindToolbar($(options.toolbarSelector), options);
        editor.attr('contenteditable', true)
            .on('mouseup keyup mouseout', function () {
                saveSelection();
                updateToolbar();
            });
        $(window).bind('touchend', function (e) {
            var isInside = (editor.is(e.target) || editor.has(e.target).length > 0),
                currentRange = getCurrentRange(),
                clear = currentRange && (currentRange.startContainer === currentRange.endContainer && currentRange.startOffset === currentRange.endOffset);
            if (!clear || isInside) {
                saveSelection();
                updateToolbar();
            }
        });
        return this;
    };
    $.fn.wysiwyg.defaults = {
        hotKeys: {
            'ctrl+b meta+b': 'bold',
            'ctrl+i meta+i': 'italic',
            'ctrl+u meta+u': 'underline',
            'ctrl+z meta+z': 'undo',
            'ctrl+y meta+y meta+shift+z': 'redo',
            'ctrl+l meta+l': 'justifyleft',
            'ctrl+r meta+r': 'justifyright',
            'ctrl+e meta+e': 'justifycenter',
            'ctrl+j meta+j': 'justifyfull',
            'shift+tab': 'outdent',
            'tab': 'indent'
        },
        toolbarSelector: '[data-role=editor-toolbar]',
        commandRole: 'edit',
        activeToolbarClass: 'btn-info',
        selectionMarker: 'edit-focus-marker',
        selectionColor: 'darkgrey',
        dragAndDropImages: true,
        fileUploadError: function (reason, detail) { console.log("File upload error", reason, detail); }
    };
}(window.jQuery));