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react-native-autoheight-webview
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Merge pull request #22 from piemonkey/add-support-for-custom-css 

Add support for custom css
iou90 6 years ago
parent
e46ae20c25 5fe9089930
commit
310081e250
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3 changed files with 75 additions and 31 deletions
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  1. 11
    1
      README.md
  2. 30
    18
      autoHeightWebView/index.android.js
  3. 34
    12
      autoHeightWebView/index.ios.js

+ 11
- 1
README.md View File 

@@ -50,7 +50,17 @@ Cause of moving View.propTypes to ViewPropTypes in React Naitve 0.44 (https://gi
50 50 
         rel: 'stylesheet'
51 51 
     }]}
52 52 
     // change script (have to change source to reload on android)
53 
-    customScript={`document.body.style.background = 'lightyellow';`} />
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+    customScript={`document.body.style.background = 'lightyellow';`}
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+    // add custom CSS to the page's <head>
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+    customStyle={`
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+      * {
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+        font-family: 'Times New Roman';
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+      }
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+      p {
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+        font-size: 16px;
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+      }
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+    `}
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+  />
54 64 
 ```
55 65
56 66 
 # demo

+ 30
- 18
autoHeightWebView/index.android.js View File 

@@ -31,6 +31,7 @@ export default class AutoHeightWebView extends PureComponent {
31 31 
     source: WebView.propTypes.source,
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     onHeightUpdated: PropTypes.func,
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     customScript: PropTypes.string,
34 
+    customStyle: PropTypes.string,
34 35 
     enableAnimation: PropTypes.bool,
35 36 
     // if set to false may cause some layout issues (width of container will be than width of screen)
36 37 
     scalesPageToFit: PropTypes.bool,
 
@@ -70,9 +71,12 @@ export default class AutoHeightWebView extends PureComponent {
70 71 
         this
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       );
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     }
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-    const initialScript = props.files
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+    let initialScript = props.files
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       ? this.appendFilesToHead(props.files, BaseScript)
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       : BaseScript;
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+    initialScript = props.customStyle
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+      ? this.appendStylesToHead(props.customStyle, initialScript)
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+      : initialScript;
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     this.state = {
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       isChangingSource: false,
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       height: 0,
 
@@ -120,6 +124,9 @@ export default class AutoHeightWebView extends PureComponent {
120 124 
     if (nextProps.files) {
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       currentScript = this.appendFilesToHead(nextProps.files, BaseScript);
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     }
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+    currentScript = nextProps.customStyle
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+      ? this.appendStylesToHead(nextProps.customStyle, currentScript)
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+      : currentScript;
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     this.setState({ script: currentScript });
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   }
125 132 
 
@@ -209,24 +216,29 @@ export default class AutoHeightWebView extends PureComponent {
209 216 
     if (!files) {
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       return script;
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     }
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-    for (let file of files) {
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-      script =
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-        `
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-                var link  = document.createElement('link');
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-                link.rel  = '` +
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-        file.rel +
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-        `';
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-                link.type = '` +
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-        file.type +
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-        `';
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-                link.href = '` +
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-        file.href +
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-        `';
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-                document.head.appendChild(link);
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-                ` +
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-        script;
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+    return files.reduceRight((file, combinedScript) => `
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+      var link  = document.createElement('link');
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+      link.rel  = '${file.rel}';
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+      link.type = '${file.type}';
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+      link.href = '${file.href}';
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+      document.head.appendChild(link);
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+      ${combinedScript}
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+    `, script)
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+  }
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+
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+  appendStylesToHead(styles, script) {
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+    if (!styles) {
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+      return script;
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     }
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-    return script;
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+    // Escape any single quotes or newlines in the CSS with .replace()
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+    const escaped = styles.replace(/\'/g, "\\'").replace(/\n/g, '\\n')
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+    return `
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+      var styleElement = document.createElement('style');
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+      var styleText = document.createTextNode('${escaped}');
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+      styleElement.appendChild(styleText);
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+      document.head.appendChild(styleElement);
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+      ${script}
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+    `
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   }
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   render() {

+ 34
- 12
autoHeightWebView/index.ios.js View File 

@@ -19,6 +19,7 @@ export default class AutoHeightWebView extends PureComponent {
19 19 
         source: WebView.propTypes.source,
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         onHeightUpdated: PropTypes.func,
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         customScript: PropTypes.string,
22 
+        customStyle: PropTypes.string,
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         enableAnimation: PropTypes.bool,
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         // if set to true may cause some layout issues (smaller font size)
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         scalesPageToFit: PropTypes.bool,
 
@@ -48,7 +49,13 @@ export default class AutoHeightWebView extends PureComponent {
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         if (this.props.enableAnimation) {
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             this.opacityAnimatedValue = new Animated.Value(0);
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         }
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-        const initialScript = props.files ? this.appendFilesToHead(props.files, props.hasIframe ? IframeBaseScript : BaseScript) : props.hasIframe ? IframeBaseScript : BaseScript;
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+        let initialScript = props.hasIframe ? IframeBaseScript : BaseScript;
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+        initialScript = props.files
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+          ? this.appendFilesToHead(props.files, BaseScript)
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+          : BaseScript;
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+        initialScript = props.customStyle
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+          ? this.appendStylesToHead(props.customStyle, initialScript)
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+          : initialScript;
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         this.state = {
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             height: 0,
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             script: initialScript
 
@@ -58,8 +65,11 @@ export default class AutoHeightWebView extends PureComponent {
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     componentWillReceiveProps(nextProps) {
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         let currentScript = nextProps.hasIframe ? IframeBaseScript : BaseScript;
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         if (nextProps.files) {
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-            currentScript = this.appendFilesToHead(nextProps.files, nextProps.hasIframe ? IframeBaseScript : BaseScript);
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+            currentScript = this.appendFilesToHead(nextProps.files, currentScript);
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         }
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+        currentScript = nextProps.customStyle
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+          ? this.appendStylesToHead(nextProps.customStyle, currentScript)
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+          : currentScript;
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         this.setState({ script: currentScript });
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     }
65 75 
 
@@ -67,17 +77,29 @@ export default class AutoHeightWebView extends PureComponent {
67 77 
         if (!files) {
68 78 
             return script;
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         }
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-        for (let file of files) {
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-            script =
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-                `
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-                var link  = document.createElement('link');
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-                link.rel  = '` + file.rel + `';
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-                link.type = '` + file.type + `';
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-                link.href = '` + file.href + `';
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-                document.head.appendChild(link);
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-                `+ script;
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-        }
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+        return files.reduceRight((file, combinedScript) => `
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+          var link  = document.createElement('link');
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+          link.rel  = '${file.rel}';
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+          link.type = '${file.type}';
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+          link.href = '${file.href}';
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+          document.head.appendChild(link);
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+          ${combinedScript}
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+        `, script)
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+    }
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+
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+    appendStylesToHead(styles, script) {
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+      if (!styles) {
80 92 
         return script;
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+      }
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+      // Escape any single quotes or newlines in the CSS with .replace()
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+      const escaped = styles.replace(/\'/g, "\\'").replace(/\n/g, '\\n')
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+      return `
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+        var styleElement = document.createElement('style');
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+        var styleText = document.createTextNode('${escaped}');
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+        styleElement.appendChild(styleText);
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+        document.head.appendChild(styleElement);
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+        ${script}
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+      `
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     }
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     onHeightUpdated(height) {