选择&删除要分析的文件和/或文件夹 [英] Select & Drop Files and/or Folders to be parsed
问题描述
我已经使用了一篇帖子来讨论Chrome上的文件和文件夹,但是我无法在Firefox上运行(说实话,我还没有尝试在别人身上,但我认为它不适用于safari)。
这是2个指令ngDrop和输入。
angular.module('myApp')。directive(ngDrop,function($ rootScope){
var link = function($ scope,elements ,attr,ngModel){
var parseInput = function(event){
var list = [];
$ scope.count = 0;
var toParse = [];
for(var i = 0; i< event.dataTransfer.items.length; i ++){
toParse.push(event.dataTransfer.items [i] .webkitGetAsEntry ());
}
var traverse_directory = function(entry){
var reader = entry.createReader();
//解析整个目录ectory被遍历
返回新的Promise(函数执行器(resolve_directory){
var iteration_attempts = [];
(函数read_entries(){
//根据FileSystem API规范,readEntries()必须被调用,直到
//它用一个空数组调用回调。 $ b reader.readEntries(函数(entries){
if(!entries.length){
//完成迭代此特定目录
resolve_directory(Promise.all(iteration_attempts));
} else {
//为每个目录条目添加一个promise列表,如果这个条目本身是
//一个目录,那么这个promise将会被解析,直到完全遍历。 $ b iteration_attempts.push(Promise.all(entries.map(function(entry){
if(entry.isFile){
list.push(条目);
返回入口;
} else {
return traverse_directory(entry);
}
})));
//根据spec
read_entries();再次尝试调用readEntries()以获得相同的目录。
}
});
})();
});
};
var updateNgModel = function(){
var files = [],count = 0;
for(var i = 0; i< list.length; i ++){
list [i] .file(function(file){
files.push(file);
count ++;
if(count === list.length){
ngModel。$ setViewValue(files);
}
});
}
}; (var j = 0; j if(toParse [j] .isFile){
list.push(toParse [j ]);
} else if(toParse [j] .isDirectory){
$ scope.count ++;
traverse_directory(toParse [j])。then(function(){
$ scope.count--;
if($ scope.count == 0){
updateNgModel );
}
});
if($ scope.count == 0){
updateNgModel();
元素[0] .ondrop = function(event){
event.stopPropagation();
event.preventDefault();
// ...造型
parseInput(event);
};
$ b元素[0] .ondragover =函数(事件){
event.preventDefault();
};
};
return {
restrict:'A',
require:^ ngModel,
link:link
};
});
$ b $ //输入文件
angular.module('myApp')。directive(input,function($ rootScope){
var link = function($ scope ,元素,attr,ngModel){
if(attr.type&& attr.type.toLowerCase()==='file'){
elements [0] .onchange = function(event ){
var list = event .__ files_ ||(event.target&& event.target.files);
var files = [];
for(var i = 0; i< list.length; i ++){
files.push(list [i]);
}
ngModel。$ setViewValue(files);
};
$;
返回{
restrict:'E',
需要:^ ngModel,
链接:link
};
});
关于实现,我使用它们:
< div class =dropzoneng-model =filesng-drop>
< input type =fileng-model =fileswebkitdirectory multiple>
< h2>< i class =fa fa-upload>< / i>在此处放置图片!< / h2>
< div>或者只需点击选择文件。< / div>
< / div>
这两个指令主要是用来填充ngModel的。
现在,当我在FF中拖放时: TypeError:event.dataTransfer.items未定义
当我选择: TypeError:list是空的
我可以改变什么来使它在Chrome和Firefox上都能正常工作,为什么不能在同一时间同时使用其他浏览器?
Nightly 45+支持目录上传。请参见 Firefox是否支持文件夹上传?
plnkr http://plnkr.co/edit/DSUeZiW4JjvxmRrFnqN0?p=preview
I've used a part from a post here on SO ( I can't remember it though ) to parse files and folders on Chrome, but I cannot get it to work on Firefox (and to be honest I haven't tried it on others, though I think it doesn't work on safari either).
Here's the 2 directives, ngDrop and input.
angular.module('myApp').directive("ngDrop", function($rootScope) {
var link = function($scope, elements, attr, ngModel) {
var parseInput = function(event) {
var list = [];
$scope.count = 0;
var toParse = [];
for (var i = 0; i < event.dataTransfer.items.length; i++) {
toParse.push(event.dataTransfer.items[i].webkitGetAsEntry());
}
var traverse_directory = function(entry) {
var reader = entry.createReader();
// Resolved when the entire directory is traversed
return new Promise(function executer(resolve_directory) {
var iteration_attempts = [];
(function read_entries() {
// According to the FileSystem API spec, readEntries() must be called until
// it calls the callback with an empty array. Seriously??
reader.readEntries(function(entries) {
if (!entries.length) {
// Done iterating this particular directory
resolve_directory(Promise.all(iteration_attempts));
} else {
// Add a list of promises for each directory entry. If the entry is itself
// a directory, then that promise won't resolve until it is fully traversed.
iteration_attempts.push(Promise.all(entries.map(function(entry) {
if (entry.isFile) {
list.push(entry);
return entry;
} else {
return traverse_directory(entry);
}
})));
// Try calling readEntries() again for the same dir, according to spec
read_entries();
}
});
})();
});
};
var updateNgModel = function() {
var files = [], count = 0;
for (var i = 0; i < list.length; i++) {
list[i].file(function(file) {
files.push(file);
count++;
if (count === list.length) {
ngModel.$setViewValue(files);
}
});
}
};
for (var j = 0; j < toParse.length; j++) {
if (toParse[j].isFile) {
list.push(toParse[j]);
} else if (toParse[j].isDirectory) {
$scope.count++;
traverse_directory(toParse[j]).then(function() {
$scope.count--;
if ($scope.count == 0) {
updateNgModel();
}
});
}
}
if ($scope.count == 0) {
updateNgModel();
}
}
elements[0].ondrop = function(event) {
event.stopPropagation();
event.preventDefault();
// ... styling
parseInput(event);
};
elements[0].ondragover = function(event) {
event.preventDefault();
};
};
return {
restrict: 'A',
require:"^ngModel",
link: link
};
});
// select file on input
angular.module('myApp').directive("input", function($rootScope) {
var link = function($scope, elements, attr, ngModel) {
if (attr.type && attr.type.toLowerCase() === 'file') {
elements[0].onchange = function(event) {
var list = event.__files_ || (event.target && event.target.files);
var files = [];
for (var i = 0; i < list.length; i++) {
files.push(list[i]);
}
ngModel.$setViewValue(files);
};
}
};
return {
restrict: 'E',
require:"^ngModel",
link: link
};
});
About the implementation, this is how I use them :
<div class="dropzone" ng-model="files" ng-drop>
<input type="file" ng-model="files" webkitdirectory multiple>
<h2><i class="fa fa-upload"></i> Drop Images Here !</h2>
<div>Or just click to select files.</div>
</div>
Both of the directives are primarily used to fill the ngModel.
Now when I drag/drop in FF : TypeError: event.dataTransfer.items is undefined
and when I select : TypeError: list is null
What can I change to get it to work on both Chrome and Firefox, and why not, also other browsers at the same time ?
Nightly 45+ supports directory upload. See Does Firefox support folder upload?
window.onload = function() {
document.querySelector("input").onchange = function(e) {
var uploadFile = function(file, path) {
// handle file uploading
console.log(file, path)
};
var iterateFilesAndDirs = function(filesAndDirs, path) {
for (var i = 0; i < filesAndDirs.length; i++) {
if (typeof filesAndDirs[i].getFilesAndDirectories === "function") {
var path = filesAndDirs[i].path;
// this recursion enables deep traversal of directories
filesAndDirs[i].getFilesAndDirectories().then(function(subFilesAndDirs) {
// iterate through files and directories in sub-directory
iterateFilesAndDirs(subFilesAndDirs, path);
});
} else {
uploadFile(filesAndDirs[i], path);
}
}
};
if ("getFilesAndDirectories" in e.target) {
e.target.getFilesAndDirectories()
.then(function(filesAndDirs) {
iterateFilesAndDirs(filesAndDirs, "/");
})
} else {
// do webkit stuff
}
}
}
<input type="file" webkitdirectory allowdirs directory />
plnkr http://plnkr.co/edit/DSUeZiW4JjvxmRrFnqN0?p=preview
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