contextmenu="supermenu" 属性的应用 右键菜单打开和保存功能

<div ng-class="{'chat-dialog-news-mine':{{item.isOwn}},'chat-dialog-news-other':{{!item.isOwn}},'chat-dialog-news-file':{{item.content_type == 6}},'chat-dialog-news-mine-file':{{item.isOwn}}&&{{item.content_type == 6}},'chat-dialog-news-other-file':{{!item.isOwn}}&&{{item.content_type == 6}}}" msgId="{{item.imdn_id}}">
<div contextmenu="supermenu" ng-right-click="decrement_right($event,item)">
<i class="icon warn-icon" ng-if="item.isWarn"></i>
<i ng-class="{true: 'icon {{item.status}}', false: ''}[{{item.isOwn && item.status !== ''}}]"></i>
<i ng-class="{true: 'bubble-icon right-icon', false: 'bubble-icon left-icon'}[{{item.isOwn}}]"></i>
<span compile='item.content|trustHtml' ng-click="newsClick($event, item)" ng-dblclick="newsDBClick($event, item)"></span>
</div>
<!--设置右键弹出样式-->
<div class="supermenus" id="supermenu" ng-show="iscontextMenus">
<ul>
<li ng-click="openRightClick($event)">打开</li>
<li ng-click="preserveRightClick($event)">保存</li>
</ul>
</div>

//点击任意出关闭右键弹窗
$(document).off('click').on('click', function(e) {
$scope.iscontextMenus = false;
if (!$scope.$$phase) {
$scope.$apply();
}
})

//二人会话和群会话消息，右键打开文件功能
$scope.openRightClick = function ($event) {
openRightFile ($event);
}
function openRightFile ($event) {
$event.stopPropagation();
$event.preventDefault();
$scope.iscontextMenus = false;
var content_type = items.content_type,//消息的类型是文本消息还是图片消息还是文档消息
$curTarget = angular.element($event.currentTarget);
switch (content_type){
case eucTypes.rcsTypes.ContentType.ContentTypePICTURE:
const exec = require('child_process').exec;
exec('"' + items.file_path + '"');
break;
case eucTypes.rcsTypes.ContentType.ContentTypeOTHER:
if ((messageService.FILE_STATE.RECEIVE_SUCCESS == items.file_state) ||
(messageService.FILE_STATE.SEND_SUCCESS == items.file_state)) {
const exec = require('child_process').exec;
exec('"' +items.file_path + '"');
}
break;
default :
break;
}
};
//二人会话和群会话消息，右键保存文件功能
const remote = require('electron').remote;
var fs = require('fs');
$scope.preserveRightClick = function($event){
$event.stopPropagation();
$event.preventDefault();
$scope.iscontextMenus = false;
　　　　　　　　electron调用后返回的回调是一个文件的路径；
const saveFilePath = remote.dialog.showSaveDialog(remote.getCurrentWindow(), {defaultPath:items.file_name}
);
var fileReadStream = fs.createReadStream(items.file_path);
var fileWriteStream = fs.createWriteStream(saveFilePath);
fileReadStream.pipe(fileWriteStream);
fileWriteStream.on('close',function(){
console.log('copy over');
});

}

electron框架提供的应用；
const remote = require('electron').remote;
remote.dialog.showSaveDialog(remote.getCurrentWindow(), {defaultPath:"abc.txt"});

node.js fs模块文件的读入和写出
var fs = require('fs');
var fileReadStream = fs.createReadStream('./myjpg.jpg');
var fileWriteStream = fs.createWriteStream('./new_myjpg.jpg');
fileReadStream.pipe(fileWriteStream);
fileWriteStream.on('close',function(){
console.log('copy over');
});

上下文contenxmenu属性的应用；  id="supermenu"