From bedfa6abf0ea09be1ea44de0c014d83bd57a7412 Mon Sep 17 00:00:00 2001
From: Andreas Gohr <andi@splitbrain.org>
Date: Fri, 19 Aug 2011 20:09:07 +0200
Subject: moved keyhandler to the new dw_editor object

---
 lib/scripts/editor.js | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)

(limited to 'lib/scripts/editor.js')

diff --git a/lib/scripts/editor.js b/lib/scripts/editor.js
index d1bfe0232..6d7f9f4a8 100644
--- a/lib/scripts/editor.js
+++ b/lib/scripts/editor.js
@@ -18,6 +18,17 @@ var dw_editor = {
         if(!$editor.length) return;
 
         dw_editor.initSizeCtl('#size__ctl',$editor);
+
+        if($editor.attr('readOnly')) return;
+
+        // in Firefox, keypress doesn't send the correct keycodes,
+        // in Opera, the default of keydown can't be prevented
+        if (jQuery.browser.opera) {
+            $editor.keypress(dw_editor.keyHandler);
+        } else {
+            $editor.keydown(dw_editor.keyHandler);
+        }
+
     },
 
     /**
@@ -108,6 +119,86 @@ var dw_editor = {
         var nxtSib = textarea.nextSibling;
         parNod.removeChild(textarea);
         parNod.insertBefore(textarea, nxtSib);
+    },
+
+    /**
+     * Make intended formattings easier to handle
+     *
+     * Listens to all key inputs and handle indentions
+     * of lists and code blocks
+     *
+     * Currently handles space, backspce and enter presses
+     *
+     * @author Andreas Gohr <andi@splitbrain.org>
+     * @fixme handle tabs
+     * @param event e - the key press event object
+     */
+    keyHandler: function(e){
+        if(e.keyCode != 13 &&
+           e.keyCode != 8  &&
+           e.keyCode != 32) return;
+        var field     = e.target;
+        var selection = getSelection(field);
+        if(selection.getLength()) return; //there was text selected, keep standard behavior
+        var search    = "\n"+field.value.substr(0,selection.start);
+        var linestart = Math.max(search.lastIndexOf("\n"),
+                                 search.lastIndexOf("\r")); //IE workaround
+        search = search.substr(linestart);
+
+        if(e.keyCode == 13){ // Enter
+            // keep current indention for lists and code
+            var match = search.match(/(\n  +([\*-] ?)?)/);
+            if(match){
+                var scroll = field.scrollHeight;
+                var match2 = search.match(/^\n  +[\*-]\s*$/);
+                // Cancel list if the last item is empty (i. e. two times enter)
+                if (match2 && field.value.substr(selection.start).match(/^($|\r?\n)/)) {
+                    field.value = field.value.substr(0, linestart) + "\n" +
+                                  field.value.substr(selection.start);
+                    selection.start = linestart + 1;
+                    selection.end = linestart + 1;
+                    setSelection(selection);
+                } else {
+                    insertAtCarret(field.id,match[1]);
+                }
+                field.scrollTop += (field.scrollHeight - scroll);
+                e.preventDefault(); // prevent enter key
+                return false;
+            }
+        }else if(e.keyCode == 8){ // Backspace
+            // unindent lists
+            var match = search.match(/(\n  +)([*-] ?)$/);
+            if(match){
+                var spaces = match[1].length-1;
+
+                if(spaces > 3){ // unindent one level
+                    field.value = field.value.substr(0,linestart)+
+                                  field.value.substr(linestart+2);
+                    selection.start = selection.start - 2;
+                    selection.end   = selection.start;
+                }else{ // delete list point
+                    field.value = field.value.substr(0,linestart)+
+                                  field.value.substr(selection.start);
+                    selection.start = linestart;
+                    selection.end   = linestart;
+                }
+                setSelection(selection);
+                e.preventDefault(); // prevent backspace
+                return false;
+            }
+        }else if(e.keyCode == 32){ // Space
+            // intend list item
+            var match = search.match(/(\n  +)([*-] )$/);
+            if(match){
+                field.value = field.value.substr(0,linestart)+'  '+
+                              field.value.substr(linestart);
+                selection.start = selection.start + 2;
+                selection.end   = selection.start;
+                setSelection(selection);
+                e.preventDefault(); // prevent space
+                return false;
+            }
+        }
     }
 
 
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