Add shim for codemirror on touchscreens

fixes #2385

- stolen the CM shim from js-bin
- if we're on a touchscreen device, don't use CM
- if we're on a touchscreen device, show a coming soon message for uploads

ghost/admin/assets/lib/editor/mobileCodeMirror.js

@@ -0,0 +1,112 @@
+// Taken from js-bin with thanks to Remy Sharp
+// yeah, nasty, but it allows me to switch from a RTF to plain text if we're running a iOS
+
+/*global Ghost, $, _, DocumentTouch, CodeMirror*/
+(function () {
+    Ghost.touchEditor = false;
+
+    var noop = function () {},
+        hasTouchScreen,
+        smallScreen,
+        TouchEditor,
+        _oldCM,
+        key;
+
+    // Taken from "Responsive design & the Guardian" with thanks to Matt Andrews
+    // Added !window._phantom so that the functional tests run as though this is not a touch screen.
+    // In future we can do something more advanced here for testing both touch and non touch
+    hasTouchScreen = function () {
+        return !window._phantom &&
+            (
+                ('ontouchstart' in window) ||
+                (window.DocumentTouch && document instanceof DocumentTouch)
+            );
+    };
+
+    smallScreen = function () {
+        if (window.matchMedia('(max-width: 1000px)').matches) {
+            return true;
+        }
+
+        return false;
+    };
+
+    if (hasTouchScreen()) {
+        $('body').addClass('touch-editor');
+        Ghost.touchEditor = true;
+
+        TouchEditor = function (el, options) {
+            /*jshint unused:false*/
+            this.textarea = el;
+            this.win = { document : this.textarea };
+            this.ready = true;
+            this.wrapping = document.createElement('div');
+
+            var textareaParent = this.textarea.parentNode;
+            this.wrapping.appendChild(this.textarea);
+            textareaParent.appendChild(this.wrapping);
+
+            this.textarea.style.opacity = 1;
+
+            $(this.textarea).blur(_.throttle(function () {
+                $(document).trigger('markdownEditorChange', { panelId: el.id });
+            }, 200));
+
+            if (!smallScreen()) {
+                $(this.textarea).on('change', _.throttle(function () {
+                    $(document).trigger('markdownEditorChange', { panelId: el.id });
+                }, 200));
+            }
+        };
+
+        TouchEditor.prototype = {
+            setOption: function (type, handler) {
+                if (type === 'onChange') {
+                    $(this.textarea).change(handler);
+                }
+            },
+            eachLine: function () {
+                return [];
+            },
+            getValue: function () {
+                return this.textarea.value;
+            },
+            setValue: function (code) {
+                this.textarea.value = code;
+            },
+            focus: noop,
+            getCursor: function () {
+                return { line: 0, ch: 0 };
+            },
+            setCursor: noop,
+            currentLine: function () {
+                return 0;
+            },
+            cursorPosition: function () {
+                return { character: 0 };
+            },
+            addMarkdown: noop,
+            nthLine: noop,
+            refresh: noop,
+            selectLines: noop,
+            on: noop
+        };
+
+        _oldCM = CodeMirror;
+
+        // CodeMirror = noop;
+
+        for (key in _oldCM) {
+            if (_oldCM.hasOwnProperty(key)) {
+                CodeMirror[key] = noop;
+            }
+        }
+
+        CodeMirror.fromTextArea = function (el, options) {
+            return new TouchEditor(el, options);
+        };
+
+        CodeMirror.keyMap = { basic: {} };
+
+    }
+}());

ghost/admin/assets/lib/showdown/extensions/ghostdown.js

@@ -1,4 +1,5 @@
 /* jshint node:true, browser:true */
+var Ghost = Ghost || {};
 (function () {
     var ghostdown = function () {
         return [
@@ -12,15 +13,24 @@
                         pathRegex = /^(\/)?([^\/\0]+(\/)?)+$/i;
 
                     return text.replace(imageMarkdownRegex, function (match, key, alt, src) {
-                        var result = "";
+                        var result = '',
+                            output;
 
                         if (src && (src.match(uriRegex) || src.match(pathRegex))) {
                             result = '<img class="js-upload-target" src="' + src + '"/>';
                         }
-                        return '<section id="image_upload_' + key + '" class="js-drop-zone image-uploader">' + result +
-                               '<div class="description">Add image of <strong>' + alt + '</strong></div>' +
-                               '<input data-url="upload" class="js-fileupload main fileupload" type="file" name="uploadimage">' +
-                               '</section>';
+
+                        if (Ghost && Ghost.touchEditor) {
+                            output = '<section class="image-uploader">' +
+                                result + '<div class="description">Mobile uploads coming soon</div></section>';
+                        } else {
+                            output = '<section id="image_upload_' + key + '" class="js-drop-zone image-uploader">' +
+                                result + '<div class="description">Add image of <strong>' + alt + '</strong></div>' +
+                                '<input data-url="upload" class="js-fileupload main fileupload" type="file" name="uploadimage">' +
+                                '</section>';
+                        }
+
+                        return output;
                     });
                 }
             },