Replace SimpleMDE with custom Markdown editor

1 files changed, 158 insertions, 0 deletions

diff --git a/assets/js/components/text-editor.js b/assets/js/components/text-editor.js
new file mode 100644
index 00000000..625ade0d
--- /dev/null
+++ b/assets/js/components/text-editor.js
@@ -0,0 +1,158 @@
+Vue.component('texteditor', {
+    props: ['text', 'name', 'labelPreview', 'labelWrite', 'placeholder', 'css', 'tabindex', 'required', 'autofocus'],
+    template:
+        '<div class="text-editor">' +
+        '<div class="text-editor-toolbar">' +
+        '<button v-if="!preview" v-on:click.prevent="togglePreview"><i class="fa fa-fw fa-eye"></i>{{ labelPreview }}</button>' +
+        '<button v-if="preview" v-on:click.prevent="toggleEditor"><i class="fa fa-fw fa-pencil-square-o"></i>{{ labelWrite }}</button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertBoldTag"><i class="fa fa-bold fa-fw"></i></button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertItalicTag"><i class="fa fa-italic fa-fw"></i></button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertStrikethroughTag"><i class="fa fa-strikethrough fa-fw"></i></button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertQuoteTag"><i class="fa fa-quote-right fa-fw"></i></button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertBulletListTag"><i class="fa fa-list-ul fa-fw"></i></button>' +
+        '<button :disabled="isPreview" v-on:click.prevent="insertCodeTag"><i class="fa fa-code fa-fw"></i></button>' +
+        '</div>' +
+        '<div v-show="!preview" class="text-editor-write-area">' +
+        '<textarea ' +
+            'v-model="text" ' +
+            'name="{{ name }}" ' +
+            'id="{{ getId }}" ' +
+            'class="{{ css }}" ' +
+            'tabindex="{{ tabindex }}" ' +
+            ':autofocus="hasAutofocus" ' +
+            'placeholder="{{ placeholder }}" ' +
+        '></textarea>' +
+        '</div>' +
+        '<div v-show="preview" class="text-editor-preview-area markdown">{{{ renderedText }}}</div>' +
+        '</div>'
+    ,
+    data: function() {
+        return {
+            id: null,
+            preview: false,
+            renderedText: '',
+            textarea: null,
+            selectionStart: 0,
+            selectionEnd: 0
+        };
+    },
+    ready: function() {
+        this.textarea = document.getElementById(this.id);
+    },
+    computed: {
+        hasAutofocus: function() {
+            return this.autofocus === '1';
+        },
+        isPreview: function() {
+            return this.preview;
+        },
+        getId: function() {
+            if (! this.id) {
+                var i = 0;
+                var uniqueId;
+
+                while (true) {
+                    i++;
+                    uniqueId = 'text-editor-textarea-' + i;
+
+                    if (! document.getElementById(uniqueId)) {
+                        break;
+                    }
+                }
+
+                this.id = uniqueId;
+            }
+
+            return this.id;
+        }
+    },
+    methods: {
+        toggleEditor: function() {
+            this.preview = false;
+        },
+        togglePreview: function() {
+            this.preview = true;
+            this.renderedText = marked(this.text, {sanitize: true});
+        },
+        insertBoldTag: function() {
+            this.insertEnclosedTag('**');
+        },
+        insertItalicTag: function() {
+            this.insertEnclosedTag('_');
+        },
+        insertStrikethroughTag: function() {
+            this.insertEnclosedTag('~~');
+        },
+        insertQuoteTag: function() {
+            this.insertPrependTag('> ');
+        },
+        insertBulletListTag: function() {
+            this.insertPrependTag('* ');
+        },
+        insertCodeTag: function() {
+            this.insertBlockTag('```');
+        },
+        replaceTextRange: function(s, start, end, substitute) {
+            return s.substring(0, start) + substitute + s.substring(end);
+        },
+        getSelectedText: function() {
+            return this.text.substring(this.textarea.selectionStart, this.textarea.selectionEnd);
+        },
+        insertEnclosedTag: function(tag) {
+            var selectedText = this.getSelectedText();
+
+            this.insertText(tag + selectedText + tag);
+            this.setCursorBeforeClosingTag(tag);
+        },
+        insertPrependTag: function(tag) {
+            var selectedText = this.getSelectedText();
+
+            if (selectedText.indexOf('\n') === -1) {
+                this.insertText('\n' + tag + selectedText);
+            } else {
+                var lines = selectedText.split('\n');
+
+                for (var i = 0; i < lines.length; i++) {
+                    if (lines[i].indexOf(tag) === -1) {
+                        lines[i] = tag + lines[i];
+                    }
+                }
+
+                this.insertText(lines.join('\n'));
+            }
+        },
+        insertBlockTag: function(tag) {
+            var selectedText = this.getSelectedText();
+
+            this.insertText('\n' + tag + '\n' + selectedText + '\n' + tag);
+            this.setCursorBeforeClosingTag(tag, 2);
+        },
+        insertText: function(replacedText) {
+            var result = false;
+
+            this.selectionStart = this.textarea.selectionStart;
+            this.selectionEnd = this.textarea.selectionEnd;
+            this.textarea.focus();
+
+            if (document.queryCommandSupported('insertText')) {
+                result = document.execCommand('insertText', false, replacedText);
+            }
+
+            if (! result) {
+                try {
+                    document.execCommand("ms-beginUndoUnit");
+                } catch (error) {}
+
+                this.textarea.value = this.replaceTextRange(this.text, this.textarea.selectionStart, this.textarea.selectionEnd, replacedText);
+
+                try {
+                    document.execCommand("ms-endUndoUnit");
+                } catch (error) {}
+            }
+        },
+        setCursorBeforeClosingTag: function(tag, offset) {
+            var position = this.selectionEnd + tag.length + offset;
+            this.textarea.setSelectionRange(position, position);
+        }
+    }
+});