feat: support image resizing, resolve #508 (#545)

* feat: support image resizing, resolve #508

* add docs

Author: QingWei-Li

Diff for: docs/de-de/helpers.md

@@ -60,17 +60,27 @@ You will get `<a href="/demo/">link</a>`html. Do not worry, you can still set ti
 ## Github Task Lists
 
 ```md
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
 ```
 
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
+
+## Image resizing
+
+```md
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')
+```
+
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')

Diff for: docs/helpers.md

@@ -66,17 +66,27 @@ You will get `<a href="/demo/">link</a>`html. Do not worry, you can still set ti
 ## Github Task Lists
 
 ```md
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
 ```
 
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
+
+## Image resizing
+
+```md
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')
+```
+
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')

Diff for: docs/zh-cn/helpers.md

@@ -56,17 +56,27 @@ docsify 扩展了一些 Markdown 语法，可以让文档更易读。
 ## Github 任务列表
 
 ```md
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
 ```
 
-* [ ] foo
-* bar
-* [x] baz
-* [] bam <~ not working
-  * [ ] bim
-  * [ ] lim
+- [ ] foo
+- bar
+- [x] baz
+- [] bam <~ not working
+  - [ ] bim
+  - [ ] lim
+
+## Image resizing
+
+```md
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')
+```
+
+![logo](https://docsify.js.org/_media/icon.svg ':size=50x100')
+![logo](https://docsify.js.org/_media/icon.svg ':size=100')

Diff for: src/core/render/compiler.js

@@ -257,6 +257,16 @@ export class Compiler {
         attrs += ` title="${title}"`
       }
 
+      const size = config.size
+      if (size) {
+        const sizes = size.split('x')
+        if (sizes[1]) {
+          attrs += 'width=' + sizes[0] + ' height=' + sizes[1]
+        } else {
+          attrs += 'width=' + sizes[0]
+        }
+      }
+
       if (!isAbsolutePath(href)) {
         url = getPath(contentBase, getParentPath(router.getCurrentPath()), href)
       }