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Support async loading with providing Promises or thenable functions #499

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155 changes: 86 additions & 69 deletions js/jquery.ztree.core.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1045,7 +1045,6 @@
nObj.append(html.join(''));
},
asyncNode: function (setting, node, isSilent, callback) {
var i, l;
var isParent = data.nodeIsParent(setting, node);
if (node && !isParent) {
tools.apply(callback);
Expand All @@ -1058,80 +1057,98 @@
}
if (node) {
node.isAjaxing = true;
var icoObj = $$(node, consts.id.ICON, setting);
icoObj.attr({"style": "", "class": consts.className.BUTTON + " " + consts.className.ICO_LOADING});
}

var tmpParam = {};
var autoParam = tools.apply(setting.async.autoParam, [setting.treeId, node], setting.async.autoParam);
for (i = 0, l = autoParam.length; node && i < l; i++) {
var pKey = autoParam[i].split("="), spKey = pKey;
if (pKey.length > 1) {
spKey = pKey[1];
pKey = pKey[0];
if (setting.async.loadingIcon === false) {
var icoObj = $$(node, consts.id.ICON, setting);
icoObj.attr({"style": "", "class": consts.className.BUTTON + " " + consts.className.ICO_LOADING});
}
tmpParam[spKey] = node[pKey];
}
var otherParam = tools.apply(setting.async.otherParam, [setting.treeId, node], setting.async.otherParam);
if (tools.isArray(otherParam)) {
for (i = 0, l = otherParam.length; i < l; i += 2) {
tmpParam[otherParam[i]] = otherParam[i + 1];

if (setting.async.url) {
// compatible for ajax
var i, l;
var tmpParam = {};
var autoParam = tools.apply(setting.async.autoParam, [setting.treeId, node], setting.async.autoParam);
for (i = 0, l = autoParam.length; node && i < l; i++) {
var pKey = autoParam[i].split("="), spKey = pKey;
if (pKey.length > 1) {
spKey = pKey[1];
pKey = pKey[0];
}
tmpParam[spKey] = node[pKey];
}
} else {
for (var p in otherParam) {
tmpParam[p] = otherParam[p];
var otherParam = tools.apply(setting.async.otherParam, [setting.treeId, node], setting.async.otherParam);
if (tools.isArray(otherParam)) {
for (i = 0, l = otherParam.length; i < l; i += 2) {
tmpParam[otherParam[i]] = otherParam[i + 1];
}
} else {
for (var p in otherParam) {
tmpParam[p] = otherParam[p];
}
}

setting.async.load = function (treeId, node) {
var deferred = $.Deferred();
$.ajax({
contentType: setting.async.contentType,
cache: false,
type: setting.async.type,
url: tools.apply(setting.async.url, [treeId, node], setting.async.url),
data: setting.async.contentType.indexOf('application/json') > -1 ? JSON.stringify(tmpParam) : tmpParam,
dataType: setting.async.dataType,
headers: setting.async.headers,
xhrFields: setting.async.xhrFields,
success: function (msg) {
var newNodes = [];
try {
if (!msg || msg.length == 0) {
newNodes = [];
} else if (typeof msg == "string") {
newNodes = eval("(" + msg + ")");
} else {
newNodes = msg;
}
} catch (err) {
newNodes = msg;
}

deferred.resolve(newNodes);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
deferred.reject([XMLHttpRequest, textStatus, errorThrown]);
}
});

return deferred.promise();
};
}

var _tmpV = data.getRoot(setting)._ver;
$.ajax({
contentType: setting.async.contentType,
cache: false,
type: setting.async.type,
url: tools.apply(setting.async.url, [setting.treeId, node], setting.async.url),
data: setting.async.contentType.indexOf('application/json') > -1 ? JSON.stringify(tmpParam) : tmpParam,
dataType: setting.async.dataType,
headers: setting.async.headers,
xhrFields: setting.async.xhrFields,
success: function (msg) {
if (_tmpV != data.getRoot(setting)._ver) {
return;
}
var newNodes = [];
try {
if (!msg || msg.length == 0) {
newNodes = [];
} else if (typeof msg == "string") {
newNodes = eval("(" + msg + ")");
} else {
newNodes = msg;
}
} catch (err) {
newNodes = msg;
}
setting.async.load(setting.treeId, node).then(function (newNodes) {
if (_tmpV != data.getRoot(setting)._ver) {
return;
}

if (node) {
node.isAjaxing = null;
node.zAsync = true;
}
view.setNodeLineIcos(setting, node);
if (newNodes && newNodes !== "") {
newNodes = tools.apply(setting.async.dataFilter, [setting.treeId, node, newNodes], newNodes);
view.addNodes(setting, node, -1, !!newNodes ? tools.clone(newNodes) : [], !!isSilent);
} else {
view.addNodes(setting, node, -1, [], !!isSilent);
}
setting.treeObj.trigger(consts.event.ASYNC_SUCCESS, [setting.treeId, node, msg]);
tools.apply(callback);
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
if (_tmpV != data.getRoot(setting)._ver) {
return;
}
if (node) node.isAjaxing = null;
view.setNodeLineIcos(setting, node);
setting.treeObj.trigger(consts.event.ASYNC_ERROR, [setting.treeId, node, XMLHttpRequest, textStatus, errorThrown]);
if (node) {
node.isAjaxing = null;
node.zAsync = true;
}
view.setNodeLineIcos(setting, node);
if (newNodes && newNodes !== "") {
newNodes = tools.apply(setting.async.dataFilter, [setting.treeId, node, newNodes], newNodes);
view.addNodes(setting, node, -1, !!newNodes ? tools.clone(newNodes) : [], !!isSilent);
} else {
view.addNodes(setting, node, -1, [], !!isSilent);
}
setting.treeObj.trigger(consts.event.ASYNC_SUCCESS, [setting.treeId, node, newNodes]);
tools.apply(callback);
}, function (errors) {
if (_tmpV != data.getRoot(setting)._ver) {
return;
}
if (node) node.isAjaxing = null;
view.setNodeLineIcos(setting, node);
setting.treeObj.trigger(consts.event.ASYNC_ERROR, [setting.treeId, node].concat(errors));
});
return true;
},
Expand Down Expand Up @@ -1342,7 +1359,7 @@
fontStyle.push(f, ":", fontcss[f], ";");
}
html.push("<a id='", node.tId, consts.id.A, "' class='", consts.className.LEVEL, node.level,
nodeClasses.add ? ' ' + nodeClasses.add.join(' ') : '',
nodeClasses.add ? ' ' + nodeClasses.add.join(' ') : '',
"' treeNode", consts.id.A,
node.click ? " onclick=\"" + node.click + "\"" : "",
((url != null && url.length > 0) ? " href='" + url + "'" : ""), " target='", view.makeNodeTarget(node), "' style='", fontStyle.join(''),
Expand Down Expand Up @@ -2006,7 +2023,7 @@
var children = data.nodeChildren(setting, root);
if (children && children.length > 0) {
view.createNodes(setting, 0, children, null, -1);
} else if (setting.async.enable && setting.async.url && setting.async.url !== '') {
} else if (setting.async.enable && (setting.async.url || setting.async.load)) {
view.asyncNode(setting);
}
return zTreeTools;
Expand All @@ -2016,4 +2033,4 @@
var zt = $.fn.zTree,
$$ = tools.$,
consts = zt.consts;
})(jQuery);
})(jQuery);