kityminder/src/module/dropfile.js

Kity Minder

KityMinder.registerModule('DropFile', function() {

    var social,
        draftManager,
        importing = false;

    function init() {
        var container = this.getPaper().getContainer();
        container.addEventListener('dragover', onDragOver);
        container.addEventListener('drop', onDrop.bind(this));
    }

    function onDragOver(e) {
        e.preventDefault();
        e.stopPropagation();
        e.dataTransfer.dropEffect = 'copy';
    }

    function onDrop(e) {
        e.preventDefault();
        e.stopPropagation();
        var minder = this;

        if (kity.Browser.ie && Number(kity.Browser.version) < 10) {
            alert('文件导入对 IE 浏览器仅支持 10 以上版本');
            return;
        }

        var files = e.dataTransfer.files;

        if (files) {
            var file = files[0];
            importMinderFile(minder, file);
        }
    }

    function importMinderFile(minder, file, encoding) {
        if (!file) return;

        var ext = /(.)\w+$/.exec(file.name);
        
        if (!ext) return alert('不支持导入此类文件！');
        
        ext = ext[0];

        if ((/xmind/g).test(ext)) { //xmind zip
            importSync(minder, file, 'xmind');
        } else if ((/mmap/g).test(ext)) { // mindmanager zip
            importSync(minder, file, 'mindmanager');
        } else if ((/mm/g).test(ext)) { //freemind xml
            importAsync(minder, file, 'freemind', encoding);
        } else if (/km/.test(ext)) { // txt json
            importAsync(minder, file, 'json', encoding);
        } else if (/txt/.test(ext)) {
            importAsync(minder, file, 'plain', encoding);
        } else {
            alert('不支持导入此类文件!');
        }
    }

    function afterImport() {
        if (!importing) return;
        createDraft(this);
        social.setRemotePath(null, false);
        this.execCommand('camera', this.getRoot(), 800);
        setTimeout(function() {
            social.watchChanges(true);
        }, 10);
        importing = false;
    }

    // 同步加载文件
    function importSync(minder, file, protocal) {
        social = social || window.social;
        social.watchChanges(false);
        importing = true;
        minder.importData(file, protocal); //zip文件的import是同步的
    }

    // 异步加载文件
    function importAsync(minder, file, protocal, encoding) {
        var reader = new FileReader();
        reader.onload = function (e) {
            importSync(minder, e.target.result, protocal);
        };
        reader.readAsText(file, encoding || 'utf8');
    }

    function createDraft(minder) {
        draftManager = window.draftManager || (window.draftManager = new window.DraftManager(minder));
        draftManager.create();
    }

    kity.extendClass(Minder, {
        importFile: function(file, encoding) {
            importMinderFile(this, file, encoding);
            return this;
        }
    });

    return {
        events: {
            'ready': init,
            'import': afterImport
        }
    };
});