Allow right-click paste (again)

jsdoc.json

@@ -2,6 +2,7 @@
   "source": {
     "include": [
       "src/xterm.js",
+      "src/handlers/Clipboard.js",
       "addons/attach/attach.js",
       "addons/fit/fit.js",
       "addons/fullscreen/fullscreen.js",

src/handlers/Clipboard.js

@@ -0,0 +1,126 @@
+/**
+ * xterm.js: xterm, in the browser
+ * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)
+ */
+
+/**
+ * Clipboard handler module. This module contains methods for handling all
+ * clipboard-related events appropriately in the terminal.
+ * @module xterm/handlers/Clipboard
+ */
+
+/**
+ * Prepares text copied from terminal selection, to be saved in the clipboard by:
+ *   1. stripping all trailing white spaces
+ *   2. converting all non-breaking spaces to regular spaces
+ * @param {string} text The copied text that needs processing for storing in clipboard
+ * @returns {string}
+ */
+function prepareTextForClipboard(text) {
+  var space = String.fromCharCode(32),
+      nonBreakingSpace = String.fromCharCode(160),
+      allNonBreakingSpaces = new RegExp(nonBreakingSpace, 'g'),
+      processedText = text.split('\n').map(function (line) {
+        // Strip all trailing white spaces and convert all non-breaking spaces
+        // to regular spaces.
+        var processedLine = line.replace(/\s+$/g, '').replace(allNonBreakingSpaces, space);
+
+        return processedLine;
+      }).join('\n');
+
+  return processedText;
+}
+
+/**
+ * Binds copy functionality to the given terminal.
+ * @param {ClipboardEvent} ev The original copy event to be handled
+ */
+function copyHandler (ev) {
+  var copiedText = window.getSelection().toString(),
+      text = prepareTextForClipboard(copiedText);
+
+  ev.clipboardData.setData('text/plain', text);
+  ev.preventDefault(); // Prevent or the original text will be copied.
+}
+
+/**
+ * Redirect the clipboard's data to the terminal's input handler.
+ * @param {ClipboardEvent} ev The original paste event to be handled
+ * @param {Terminal} term The terminal on which to apply the handled paste event
+ */
+function pasteHandler(ev, term) {
+  ev.stopPropagation();
+  if (ev.clipboardData) {
+    var text = ev.clipboardData.getData('text/plain');
+    term.handler(text);
+    term.textarea.value = '';
+    return term.cancel(ev);
+  }
+}
+
+/**
+ * Bind to right-click event and allow right-click copy and paste.
+ *
+ * **Logic**
+ * If text is selected and right-click happens on selected text, then
+ * do nothing to allow seamless copying.
+ * If no text is selected or right-click is outside of the selection
+ * area, then bring the terminal's input below the cursor, in order to
+ * trigger the event on the textarea and allow-right click paste, without
+ * caring about disappearing selection.
+ * @param {ClipboardEvent} ev The original paste event to be handled
+ * @param {Terminal} term The terminal on which to apply the handled paste event
+ */
+function rightClickHandler(ev, term) {
+  var s = document.getSelection(),
+      sText = prepareTextForClipboard(s.toString()),
+      r = s.getRangeAt(0);
+
+  var x = ev.clientX,
+      y = ev.clientY;
+
+  var cr = r.getClientRects(),
+      clickIsOnSelection = false,
+      i, rect;
+
+  for (i=0; i<cr.length; i++) {
+    rect = cr[i];
+    clickIsOnSelection = (
+      (x > rect.left) && (x < rect.right) &&
+      (y > rect.top) && (y < rect.bottom)
+    );
+    // If we clicked on selection and selection is not a single space,
+    // then mark the right click as copy-only. We check for the single
+    // space selection, as this can happen when clicking on an &nbsp;
+    // and there is not much pointing in copying a single space.
+    // Single space is char
+    if (clickIsOnSelection && (sText !== ' ')) {
+      break;
+    }
+  }
+
+  // Bring textarea at the cursor position
+  if (!clickIsOnSelection) {
+    term.textarea.style.position = 'fixed';
+    term.textarea.style.width = '10px';
+    term.textarea.style.height = '10px';
+    term.textarea.style.left = x + 'px';
+    term.textarea.style.top = y + 'px';
+    term.textarea.style.zIndex = 1000;
+    term.textarea.focus();
+
+    // Reset the terminal textarea's styling
+    setTimeout(function () {
+      term.textarea.style.position = null;
+      term.textarea.style.width = null;
+      term.textarea.style.height = null;
+      term.textarea.style.left = null;
+      term.textarea.style.top = null;
+      term.textarea.style.zIndex = null;
+    }, 1);
+  }
+}
+
+export {
+  prepareTextForClipboard, copyHandler, pasteHandler, rightClickHandler
+};

src/xterm.css

@@ -54,13 +54,13 @@
 }
 
 .terminal .xterm-helper-textarea {
-    position: absolute;
     /*
      * HACK: to fix IE's blinking cursor
      * Move textarea out of the screen to the far left, so that the cursor is not visible.
      */
-    left: -9999em;
+    position: absolute;
     opacity: 0;
+    left: -9999em;
     width: 0;
     height: 0;
     z-index: -10;

src/xterm.js

@@ -34,6 +34,7 @@
 import { CompositionHelper } from './CompositionHelper.js';
 import { EventEmitter } from './EventEmitter.js';
 import { Viewport } from './Viewport.js';
+import { rightClickHandler, pasteHandler, copyHandler } from './handlers/Clipboard.js';
 
 /**
  * Terminal Emulation References:
@@ -431,52 +432,20 @@ Terminal.bindBlur = function (term) {
  * Initialize default behavior
  */
 Terminal.prototype.initGlobal = function() {
-  Terminal.bindPaste(this);
+  var term = this;
+
   Terminal.bindKeys(this);
-  Terminal.bindCopy(this);
   Terminal.bindFocus(this);
   Terminal.bindBlur(this);
-};
 
-/**
- * Bind to paste event and allow both keyboard and right-click pasting, without having the
- * contentEditable value set to true.
- */
-Terminal.bindPaste = function(term) {
-  on([term.textarea, term.element], 'paste', function(ev) {
-    ev.stopPropagation();
-    if (ev.clipboardData) {
-      var text = ev.clipboardData.getData('text/plain');
-      term.handler(text);
-      term.textarea.value = '';
-      return term.cancel(ev);
-    }
+  // Bind clipboard functionality
+  on(this.element, 'copy', copyHandler);
+  on(this.textarea, 'paste', function (ev) {
+    pasteHandler.call(this, ev, term);
+  });
+  on(this.element, 'contextmenu', function (ev) {
+    rightClickHandler.call(this, ev, term);
   });
-};
-
-/**
- * Prepares text copied from terminal selection, to be saved in the clipboard by:
- *   1. stripping all trailing white spaces
- *   2. converting all non-breaking spaces to regular spaces
- * @param {string} text The copied text that needs processing for storing in clipboard
- * @returns {string}
- * @static
- */
-Terminal.prepareCopiedTextForClipboard = function (text) {
-  var space = String.fromCharCode(32),
-      nonBreakingSpace = String.fromCharCode(160),
-      allNonBreakingSpaces = new RegExp(nonBreakingSpace, 'g'),
-      processedText = text.split('\n').map(function (line) {
-        /**
-         * Strip all trailing white spaces and convert all non-breaking spaces to regular
-         * spaces.
-         */
-        var processedLine = line.replace(/\s+$/g, '').replace(allNonBreakingSpaces, space);
-
-        return processedLine;
-      }).join('\n');
-
-  return processedText;
 };
 
 /**
@@ -515,16 +484,6 @@ Terminal.bindKeys = function(term) {
   term.on('refresh', term.compositionHelper.updateCompositionElements.bind(term.compositionHelper));
 };
 
-/**
- * Binds copy functionality to the given terminal.
- * @static
- */
-Terminal.bindCopy = function(term) {
-  on(term.element, 'copy', function(ev) {
-    return; // temporary
-  });
-};
-
 
 /**
  * Insert the given row to the terminal or produce a new one

test/clipboard-test.js

@@ -0,0 +1,18 @@
+var assert = require('chai').assert;
+var Terminal = require('../src/xterm');
+var Clipboard = require('../src/handlers/Clipboard');
+
+
+describe('evaluateCopiedTextProcessing', function () {
+  it('should strip trailing whitespaces and replace nbsps with spaces', function () {
+    var nonBreakingSpace = String.fromCharCode(160),
+        copiedText = 'echo' + nonBreakingSpace + 'hello' + nonBreakingSpace,
+        processedText = Clipboard.prepareTextForClipboard(copiedText);
+
+    // No trailing spaces
+    assert.equal(processedText.match(/\s+$/), null);
+
+    // No non-breaking space
+    assert.equal(processedText.indexOf(nonBreakingSpace), -1);
+  });
+});

test/test.js

@@ -245,20 +245,6 @@ describe('xterm.js', function() {
     });
   });
 
-  describe('evaluateCopiedTextProcessing', function () {
-    it('should strip trailing whitespaces and replace nbsps with spaces', function () {
-			var nonBreakingSpace = String.fromCharCode(160),
-          copiedText = 'echo' + nonBreakingSpace + 'hello' + nonBreakingSpace,
-          processedText = Terminal.prepareCopiedTextForClipboard(copiedText);
-
-      // No trailing spaces
-      assert.equal(processedText.match(/\s+$/), null);
-
-      // No non-breaking space
-      assert.equal(processedText.indexOf(nonBreakingSpace), -1);
-    });
-  });
-
   describe('Third level shift', function() {
     var evKeyDown = {
           preventDefault: function() {},