Merge pull request #28 from iamacup/text-style-fixes

Text style fixes

.eslintrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+  root: true,
+  extends: '@react-native-community',
+  settings: {
+      react: {
+          version: require('./package.json').peerDependencies.react,
+      },
+  }
+};

.gitignore

@@ -1,4 +1,7 @@
 /node_modules
 /.idea
 package-lock.json
-/.DS_Store
+/.DS_Store
+yarn-error.lock
+yarn.lock
+.eslintcache

.prettierrc.js

@@ -0,0 +1,6 @@
+module.exports = {
+  bracketSpacing: false,
+  jsxBracketSameLine: true,
+  singleQuote: true,
+  trailingComma: 'all',
+};

package.json

@@ -1,10 +1,15 @@
 {
   "name": "react-native-markdown-display",
-  "version": "4.0.2",
+  "version": "4.0.3",
   "description": "Markdown renderer for react-native, with CommonMark spec support + adds syntax extensions & sugar (URL autolinking, typographer), originally created by Mient-jan Stelling as react-native-markdown-renderer",
   "main": "src/index.js",
   "types": "src/index.d.ts",
-  "scripts": {},
+  "scripts": {
+    "lint": "./node_modules/.bin/eslint --fix --cache ./src"
+  },
+  "pre-commit": [
+    "lint"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/iamacup/react-native-markdown-display.git"
@@ -36,6 +41,11 @@
   },
   "devDependencies": {
     "chokidar": "^3.3.0",
-    "fs-extra": "^8.1.0"
+    "fs-extra": "^8.1.0",
+    "@babel/core": "^7.6.4",
+    "@babel/runtime": "^7.6.3",
+    "@react-native-community/eslint-config": "^0.0.5",
+    "eslint": "^6.6.0",
+    "pre-commit": "1.2.2"
   }
 }

src/index.js

@@ -2,7 +2,7 @@
  * Base Markdown component
  * @author Mient-jan Stelling
  */
-import { useMemo } from 'react';
+import {useMemo} from 'react';
 import PropTypes from 'prop-types';
 import parser from './lib/parser';
 import applyStyle from './lib/util/applyStyle';
@@ -15,8 +15,8 @@ import AstRenderer from './lib/AstRenderer';
 import MarkdownIt from 'markdown-it';
 import PluginContainer from './lib/plugin/PluginContainer';
 import blockPlugin from './lib/plugin/blockPlugin';
-import { styles } from './lib/styles';
-import { stringToTokens } from './lib/util/stringToTokens';
+import {styles} from './lib/styles';
+import {stringToTokens} from './lib/util/stringToTokens';
 /**
  *
  */
@@ -48,13 +48,13 @@ const getCopyFromChildren = children => {
 const getRenderer = (renderer, rules, style, onLinkPress) => {
   if (renderer && rules) {
     console.warn(
-      'react-native-markdown-display you are using renderer and rules at the same time. This is not possible, props.rules is ignored'
+      'react-native-markdown-display you are using renderer and rules at the same time. This is not possible, props.rules is ignored',
     );
   }
 
   if (renderer && style) {
     console.warn(
-      'react-native-markdown-display you are using renderer and style at the same time. This is not possible, props.style is ignored'
+      'react-native-markdown-display you are using renderer and style at the same time. This is not possible, props.style is ignored',
     );
   }
 
@@ -63,7 +63,9 @@ const getRenderer = (renderer, rules, style, onLinkPress) => {
     if (!(typeof renderer === 'function') || renderer instanceof AstRenderer) {
       return renderer;
     } else {
-      throw new Error('Provided renderer is not compatible with function or AstRenderer. please change');
+      throw new Error(
+        'Provided renderer is not compatible with function or AstRenderer. please change',
+      );
     }
   } else {
     return new AstRenderer(
@@ -75,7 +77,7 @@ const getRenderer = (renderer, rules, style, onLinkPress) => {
         ...styles,
         ...style,
       },
-      onLinkPress
+      onLinkPress,
     );
   }
 };
@@ -105,8 +107,14 @@ const Markdown = ({
   }),
   onLinkPress = () => {},
 }) => {
-  const momoizedRenderer = useMemo(() => getRenderer(renderer, rules, style, onLinkPress), [renderer, rules, style]);
-  const markdownParser = useMemo(() => getMarkdownParser(markdownit, plugins), [markdownit, plugins]);
+  const momoizedRenderer = useMemo(
+    () => getRenderer(renderer, rules, style, onLinkPress),
+    [onLinkPress, renderer, rules, style],
+  );
+  const markdownParser = useMemo(() => getMarkdownParser(markdownit, plugins), [
+    markdownit,
+    plugins,
+  ]);
 
   const copy = (this.copy = getCopyFromChildren(children));
   return parser(copy, momoizedRenderer.render, markdownParser);
@@ -117,7 +125,10 @@ const Markdown = ({
  */
 Markdown.propTypes = {
   children: PropTypes.node.isRequired,
-  renderer: PropTypes.oneOfType([PropTypes.func, PropTypes.instanceOf(AstRenderer)]),
+  renderer: PropTypes.oneOfType([
+    PropTypes.func,
+    PropTypes.instanceOf(AstRenderer),
+  ]),
   onLinkPress: PropTypes.func,
   rules: (props, propName, componentName) => {
     let invalidProps = [];
@@ -128,17 +139,19 @@ Markdown.propTypes = {
     }
 
     if (typeof prop === 'object') {
-      invalidProps = Object.keys(prop).filter(key => typeof prop[key] !== 'function');
+      invalidProps = Object.keys(prop).filter(
+        key => typeof prop[key] !== 'function',
+      );
     }
 
     if (typeof prop !== 'object') {
       return new Error(
-        `Invalid prop \`${propName}\` supplied to \`${componentName}\`. Must be of shape {[index:string]:function} `
+        `Invalid prop \`${propName}\` supplied to \`${componentName}\`. Must be of shape {[index:string]:function} `,
       );
     } else if (invalidProps.length > 0) {
       return new Error(
         `Invalid prop \`${propName}\` supplied to \`${componentName}\`. These ` +
-          `props are not of type function \`${invalidProps.join(', ')}\` `
+          `props are not of type function \`${invalidProps.join(', ')}\` `,
       );
     }
   },

src/lib/AstRenderer.js

@@ -1,6 +1,4 @@
-import React, { Component, PropTypes } from "react";
-import { Text, View } from "react-native";
-import getUniqueID from "./util/getUniqueID";
+import getUniqueID from './util/getUniqueID';
 
 /**
  *
@@ -15,6 +13,29 @@ export default class AstRenderer {
     this._renderRules = renderRules;
     this._style = style;
     this._onLinkPress = onLinkPress;
+
+    // this is all the style props that are unique to <Text> components as of 07/Nov/2019
+    this._textStyleProps = [
+      'textShadowOffset',
+      'color',
+      'fontSize',
+      'fontStyle',
+      'fontWeight',
+      'lineHeight',
+      'textAlign',
+      'textDecorationLine',
+      'textShadowColor',
+      'fontFamily',
+      'textShadowRadius',
+      'includeFontPadding',
+      'textAlignVertical',
+      'fontVariant',
+      'letterSpacing',
+      'textDecorationColor',
+      'textDecorationStyle',
+      'textTransform',
+      'writingDirection',
+    ];
   }
 
   /**
@@ -27,7 +48,7 @@ export default class AstRenderer {
 
     if (!renderFunction) {
       throw new Error(
-        `${type} renderRule not defined example: <Markdown rules={renderRules}>`
+        `${type} renderRule not defined example: <Markdown rules={renderRules}>`,
       );
     }
     return renderFunction;
@@ -45,16 +66,39 @@ export default class AstRenderer {
     const parents = [...parentNodes];
     parents.unshift(node);
 
-    if (node.type === "text") {
-      return renderFunction(node, [], parentNodes, this._style);
+    if (node.type === 'text') {
+      // we build up a style object for text types, this effectively grabs the styles from parents and
+      // applies them in order of priority parent (most) to child (least) priority
+      // so that if we overwride the text style, it does not overwrite a header1 style, for instance.
+      const styleObj = {};
+
+      for (let a = 0; a < parentNodes.length; a++) {
+        if (this._style[parentNodes[a].type]) {
+          const arr = Object.keys(this._style[parentNodes[a].type]);
+
+          for (let b = 0; b < arr.length; b++) {
+            if (this._textStyleProps.includes(arr[b])) {
+              styleObj[arr[b]] = this._style[parentNodes[a].type][arr[b]];
+            }
+          }
+        }
+      }
+
+      return renderFunction(node, [], parentNodes, this._style, styleObj);
     }
 
     const children = node.children.map(value => {
       return this.renderNode(value, parents);
     });
 
-    if (node.type === "link" || node.type === "blocklink") {
-      return renderFunction(node, children, parentNodes, this._style, this._onLinkPress);
+    if (node.type === 'link' || node.type === 'blocklink') {
+      return renderFunction(
+        node,
+        children,
+        parentNodes,
+        this._style,
+        this._onLinkPress,
+      );
     }
 
     return renderFunction(node, children, parentNodes, this._style);
@@ -67,7 +111,7 @@ export default class AstRenderer {
    */
   render = nodes => {
     const children = nodes.map(value => this.renderNode(value, []));
-    const root = { type: "root", key: getUniqueID() };
+    const root = {type: 'root', key: getUniqueID()};
     return this.getRenderFunction(root.type)(root, children, null, this._style);
   };
 }

src/lib/data/PlatformEnum.js

@@ -1,4 +1,4 @@
 export default {
-  IOS: "ios",
-  ANDROID: "android"
+  IOS: 'ios',
+  ANDROID: 'android',
 };

src/lib/parser.js

@@ -1,8 +1,6 @@
-import React from 'react';
-import { View } from 'react-native';
 import tokensToAST from './util/tokensToAST';
-import { stringToTokens } from './util/stringToTokens';
-import { cleanupTokens } from './util/cleanupTokens';
+import {stringToTokens} from './util/stringToTokens';
+import {cleanupTokens} from './util/cleanupTokens';
 import groupTextTokens from './util/groupTextTokens';
 
 /**