From 9e4f452c1ca664a7e2d126fffd244baae631d67e Mon Sep 17 00:00:00 2001
From: Ian Storm Taylor <ian@ianstormtaylor.com>
Date: Fri, 24 Jun 2016 12:06:59 -0700
Subject: [PATCH] initial plain text paste support

---
 lib/components/content.js | 65 +++++++++++++++++++++++++++------------
 lib/components/editor.js  |  7 +++--
 lib/plugins/core.js       | 33 ++++++++++++++++++++
 3 files changed, 82 insertions(+), 23 deletions(-)

diff --git a/lib/components/content.js b/lib/components/content.js
index a4b8cd83f..45dd2f076 100644
--- a/lib/components/content.js
+++ b/lib/components/content.js
@@ -19,6 +19,7 @@ class Content extends React.Component {
     onBeforeInput: React.PropTypes.func,
     onChange: React.PropTypes.func,
     onKeyDown: React.PropTypes.func,
+    onPaste: React.PropTypes.func,
     onSelect: React.PropTypes.func,
     renderMark: React.PropTypes.func.isRequired,
     renderNode: React.PropTypes.func.isRequired,
@@ -51,13 +52,49 @@ class Content extends React.Component {
   }
 
   /**
-   * On key down, bubble up.
+   * On certain events, bubble up.
+   *
+   * @param {String} name
+   * @param {Event} e
+   */
+
+  onEvent(name, e) {
+    this.props[name](e)
+  }
+
+  /**
+   * On paste, determine the type and bubble up.
    *
    * @param {Event} e
    */
 
-  onKeyDown(e) {
-    this.props.onKeyDown(e)
+  onPaste(e) {
+    e.preventDefault()
+    const data = e.clipboardData
+    const { types } = data
+    const paste = {}
+
+    // Handle files.
+    if (data.files.length != 0) {
+      paste.type = 'files'
+      paste.files = data.files
+    }
+
+    // Treat it as rich text if there is HTML content.
+    else if (types.includes('text/plain') && types.includes('text/html')) {
+      paste.type = 'html'
+      paste.text = data.getData('text/plain')
+      paste.html = data.getData('text/html')
+    }
+
+    // Treat everything else as plain text.
+    else {
+      paste.type = 'text'
+      paste.text = data.getData('text/plain')
+    }
+
+    paste.data = data
+    this.props.onPaste(e, paste)
   }
 
   /**
@@ -105,16 +142,6 @@ class Content extends React.Component {
     this.onChange(state)
   }
 
-  /**
-   * On before input, add the character to the state.
-   *
-   * @param {Event} e
-   */
-
-  onBeforeInput(e) {
-    this.props.onBeforeInput(e)
-  }
-
   /**
    * Render the editor content.
    *
@@ -136,14 +163,12 @@ class Content extends React.Component {
 
     return (
       <div
-        contentEditable
-        suppressContentEditableWarning
-        spellCheck={false}
-        data-type='content'
-        onKeyDown={e => this.onKeyDown(e)}
-        onSelect={e => this.onSelect(e)}
-        onBeforeInput={e => this.onBeforeInput(e)}
+        contentEditable suppressContentEditableWarning
         style={style}
+        onSelect={e => this.onSelect(e)}
+        onPaste={e => this.onPaste(e)}
+        onKeyDown={e => this.onEvent('onKeyDown', e)}
+        onBeforeInput={e => this.onEvent('onBeforeInput', e)}
       >
         {children}
       </div>
diff --git a/lib/components/editor.js b/lib/components/editor.js
index ca5faddeb..6dc0cd859 100644
--- a/lib/components/editor.js
+++ b/lib/components/editor.js
@@ -80,13 +80,13 @@ class Editor extends React.Component {
    * state if one of them chooses to.
    *
    * @param {String} name
-   * @param {Event} e
+   * @param {Mixed} ...args
    */
 
-  onEvent(name, e) {
+  onEvent(name, ...args) {
     for (const plugin of this.state.plugins) {
       if (!plugin[name]) continue
-      const newState = plugin[name](e, this.props.state, this)
+      const newState = plugin[name](...args, this.props.state, this)
       if (!newState) continue
       this.props.onChange(newState)
       break
@@ -106,6 +106,7 @@ class Editor extends React.Component {
         onChange={state => this.onChange(state)}
         renderMark={mark => this.renderMark(mark)}
         renderNode={node => this.renderNode(node)}
+        onPaste={(e, paste) => this.onEvent('onPaste', e, paste)}
         onBeforeInput={e => this.onEvent('onBeforeInput', e)}
         onKeyDown={e => this.onEvent('onKeyDown', e)}
       />
diff --git a/lib/plugins/core.js b/lib/plugins/core.js
index b8af26bdd..4e7ab22ee 100644
--- a/lib/plugins/core.js
+++ b/lib/plugins/core.js
@@ -127,6 +127,39 @@ export default {
     }
   },
 
+  /**
+   * The core `onPaste` handler.
+   *
+   * @param {Event} e
+   * @param {Object} paste
+   * @param {State} state
+   * @param {Editor} editor
+   * @return {State or Null} newState
+   */
+
+  onPaste(e, paste, state, editor) {
+    // Don't handle files in core.
+    if (paste.type == 'files') return
+
+    // If the paste type is html...
+    if (paste.type == 'html') {
+      // First, check for a match in the clipboard.
+      // Otherwise, check if we have a paste deserializer.
+    }
+
+    // Otherwise, just insert the plain text splitting at characters.
+    let transform = state.transform()
+
+    paste.text
+      .split('\n')
+      .forEach((block, i) => {
+        if (i > 0) transform = transform.splitBlock()
+        transform = transform.insertText(block)
+      })
+
+    return transform.apply()
+  },
+
   /**
    * Default `node` renderer.
    *