VSCode插件制作：HTML代码自动填充

Visual Studio Code不但跨平台，还有良好的扩展性。我们可以在

Visual Studio Marketplace

上找到各种各样的插件。这里分享下怎样制作一个简单的用于代码填充的插件。

自定义代码片段

键盘快捷键

Ctr+Shift+P

搜索关键字snippet：

vscode user snippet

选择HTML：

vscode snippet language

这个时候在

C:\Users\<user name>\AppData\Roaming\Code\User\snippets

下会自动创建一个

html.json

的模版文件：

vscode snippet template

现在可以在里面写一点东西了。这里是Dynamic Web TWAIN的代码：

{
    "include": {
        "prefix": "dwt include",
        "body": [
            "<script type=\"text/javascript\" src=\"https://www.dynamsoft.com/Demo/DWT/Resources/dynamsoft.webtwain.min.js\"> </script>"
        ],
        "description": "Include Dynamic Web TWAIN JavaScript library."
    },
    "scan module": {
        "prefix": "dwt scan module",
        "body": [
            "<input type=\"button\" value=\"Scan\" onclick=\"AcquireImage();\" />",
            "<div id=\"dwtcontrolContainer\"></div>\n",
            "<script type=\"text/javascript\">",
            "function AcquireImage() {",
            "\tvar DWObject = Dynamsoft.WebTwainEnv.GetWebTwain('dwtcontrolContainer');",
            "\tDWObject.IfDisableSourceAfterAcquire = true;",
            "\tvar bSelected = DWObject.SelectSource(); \n",
            "\tif(bSelected) {",
            "\t\tvar OnAcquireImageSuccess, OnAcquireImageFailure;",
            "\t\tOnAcquireImageSuccess = OnAcquireImageFailure = function () {",
            "\t\tDWObject.CloseSource();",
            "\t};\n",
            "\tDWObject.OpenSource();",
            "\tDWObject.AcquireImage(OnAcquireImageSuccess, OnAcquireImageFailure);  ",
            "\t}",
            "}",
            "</script>"
        ],
        "description": "A simple web scanning module."
    },
    "full sample": {
        "prefix": "dwt full sample",
        "body": [
            "<!DOCTYPE html>\n<head>\n\t<title>Hello World</title>",
            "\t<script type=\"text/javascript\" src=\"https://www.dynamsoft.com/Demo/DWT/Resources/dynamsoft.webtwain.min.js\"> </script>\n</head>\n\n<body>",
            "\t<input type=\"button\" value=\"Scan\" onclick=\"AcquireImage();\" />",
            "\t<div id=\"dwtcontrolContainer\"></div>\n",
            "\t<script type=\"text/javascript\">",
            "\tfunction AcquireImage() {",
            "\t\tvar DWObject = Dynamsoft.WebTwainEnv.GetWebTwain('dwtcontrolContainer');",
            "\t\tDWObject.IfDisableSourceAfterAcquire = true;",
            "\t\tvar bSelected = DWObject.SelectSource(); \n",
            "\t\tif(bSelected) {",
            "\t\t\tvar OnAcquireImageSuccess, OnAcquireImageFailure;",
            "\t\t\tOnAcquireImageSuccess = OnAcquireImageFailure = function () {",
            "\t\t\tDWObject.CloseSource();",
            "\t\t};\n",
            "\t\tDWObject.OpenSource();",
            "\t\tDWObject.AcquireImage(OnAcquireImageSuccess, OnAcquireImageFailure);  ",
            "\t\t}",
            "\t}",
            "\t</script>\n</body>\n</html>"
        ],
        "description": "The full sample code - hello world."
    }
}

现在创建一个新的html文件。在里面输入前缀

dwt

就会出现代码提示:

vscode dwt extension

插件制作

接下来要做的事，就是把这个html.json文件放到插件里面。官方推荐使用

Yeoman

:

npm install -g yo generator-code
yo code

vscode yo code

这里有几个选项，看起来我们应该选择最后一项。选择最后一项会提示你选择一个包含.tmSnippets或者 .sublime-snippets文件的目录。那没有的话怎么办呢？可以不需要yo，手动创建目录结构：

.
 
├── images     
 
    └── dwt.jpg              // The extension logo                         
 
├── snippets                   
 
│   └── html.json           // The JSON file with the snippets
 
└── package.json            // extension's manifest

这里总共有3个文件：插件logo，代码片段，配置文件。要做的事情就是编写一下配置文件：

{
    "name": "dwt",
    "displayName": "Dynamic Web TWAIN",
    "description": "Dynamic Web TWAIN is a browser-based document scanning SDK specifically designed for web applications. With just a few lines of JavaScript code, you can develop robust applications to scan documents.",
    "version": "0.0.4",
    "publisher": "Dynamsoft",
    "icon": "images/dwt.jpg",
    "categories": [
        "Snippets"
    ],
    "galleryBanner": {
        "color": "#f5f3f4",
        "theme": "light"
    },
    "homepage": "http://www.dynamsoft.com/Products/WebTWAIN_Overview.aspx",
    "repository": {
        "type": "git",
        "url": "https://github.com/Dynamsoft/Dynamic-Web-TWAIN.git"
    },
    "engines": {
        "vscode": "^1.5.0"
    },
    "keywords": [
        "JavaScript TWAIN",
        "JavaScript scan",
        "Document scanning",
        "Document management",
        "Web TWAIN"
    ],
    "contributes": {
        "snippets": [{
            "language": "html",
            "path": "./snippets/html.json"
        }]
    }
}

插件打包

接下来用vsce来打包：

npm install -g vsce
vsce package

这个时候会生成一个.visx的文件。我们可以直接安装：

code --install-extension extension.vsix

插件被安装在

C:\Users\<user name>\.vscode\extensions\Dynamsoft.dwt-0.0.4

。安装之后可以在VS Code中测试下是否起作用。

发布插件

创建一个新的发布者：

vsce create-publisher (publisher name)

使用刚才创建的Token来发布插件：

vsce login (publisher name)
vsce publish -p <token>

安装插件

这里是我做好的插件：

https://marketplace.visualstudio.com/items?itemName=Dynamsoft.dwt

vscode dwt online

VS Code中使用快捷键Ctrl+P安装插件：

ext install dwt

install dwt for visual studio code

安装之后重启一下VS Code就可以用了。

参考资料

源码

https://github.com/dynamsoft-dwt/vscode-extension