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splitting blocks from spans
[fnpeditor.git] / src / editor / modules / documentCanvas / canvas / keyboard.js
diff --git a/src/editor/modules/documentCanvas/canvas/keyboard.js b/src/editor/modules/documentCanvas/canvas/keyboard.js
index 1830017..bd66c6e 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/keyboard.js
+++ b/src/editor/modules/documentCanvas/canvas/keyboard.js
@@ -1,10 +1,11 @@
 define([
 define([
+'libs/jquery',
 'modules/documentCanvas/canvas/documentElement',
 'modules/documentCanvas/canvas/utils'
 'modules/documentCanvas/canvas/documentElement',
 'modules/documentCanvas/canvas/utils'
-], function(documentElement, utils) {
+], function($, documentElement, utils) {
     
 'use strict';
     
 'use strict';
-
+/* globals gettext */
 
 var KEYS = {
     ENTER: 13,
 
 var KEYS = {
     ENTER: 13,
@@ -27,13 +28,64 @@ var handleKey = function(event, canvas) {
 };
 
 var handles = function(handler, event) {
 };
 
 var handles = function(handler, event) {
-    if(handler.key === event.which)
+    if(handler.key === event.which) {
         return true;
         return true;
-    if(handler.keys && handler.keys.indexOf(event.which) !== -1)
+    }
+    if(handler.keys && handler.keys.indexOf(event.which) !== -1) {
         return true;
         return true;
+    }
     return false;
 };
 
     return false;
 };
 
+
+var scroll = function(place, textElement) {
+    var rect = textElement.getBoundingClientRect(),
+        scroll = $('#rng-module-documentCanvas-contentWrapper'),
+        border = rect.bottom - (place === 'top' ? rect.height : 0) - scroll.offset().top + scroll[0].scrollTop,
+        visible = scroll[0].scrollTop + {top: 0, bottom: scroll.height()}[place],
+        padding = 16,
+        toScroll = 0;
+    
+    if(place === 'top' && (border - padding < visible)) {
+        toScroll =  border - visible - padding;
+    } else if(place === 'bottom' && (border + padding > visible))  {
+        toScroll = border - visible + padding;
+    }
+    if(toScroll) {
+        scroll[0].scrollTop = scroll[0].scrollTop + toScroll;
+    }
+    return toScroll;
+};
+
+var getLastRectAbove = function(node, y) {
+    var rects = node.getClientRects(),
+        idx = 0,
+        rect, toret;
+    while((rect = rects[idx])) {
+        if(rect.bottom < y) {
+            toret = rect;
+        } else {
+            break;
+        }
+        idx++;
+    }
+    return toret;
+};
+
+var getFirstRectBelow = function(node, y) {
+    var rects = node.getClientRects(),
+        idx = 0,
+        rect, toret;
+    while((rect = rects[idx])) {
+        if(rect.top > y) {
+            toret = rect;
+            break;
+        }
+        idx++;
+    }
+    return toret;
+};
+
 var handlers = [];
 
 
 var handlers = [];
 
 
@@ -44,11 +96,49 @@ handlers.push({key: KEYS.ENTER,
             position = cursor.getPosition(),
             element = position.element;
 
             position = cursor.getPosition(),
             element = position.element;
 
+        if(Object.keys(cursor.getPosition()).length === 0) {
+            var currentElement = canvas.getCurrentNodeElement();
+            if(currentElement && !currentElement.wlxmlNode.isRoot()) {
+                canvas.wlxmlDocument.transaction(function() {
+                    var added = currentElement.wlxmlNode.after({
+                        tagName: currentElement.wlxmlNode.getTagName() || 'div',
+                        attrs: {'class': currentElement.wlxmlNode.getClass() || 'p'}
+                    });
+                    added.append({text:''});
+                    return added;
+                }, {
+                    metadata: {
+                        description: gettext('Splitting text')
+                    },
+                    success: function(ret) {
+                        canvas.setCurrentElement(utils.getElementForNode(ret), {caretTo: 'start'});
+                    }
+                });
+
+            }
+            return;
+        }
+
         if(!cursor.isSelecting()) {
             if(event.ctrlKey) {
         if(!cursor.isSelecting()) {
             if(event.ctrlKey) {
-                var added = element.after({tag: 'block'});
-                added.append({text:''});
-                canvas.setCurrentElement(added, {caretTo: 'start'});
+                if(element instanceof documentElement.DocumentTextElement) {
+                    element = element.parent();
+                }
+
+                canvas.wlxmlDocument.transaction(function() {
+                    var added = element.wlxmlNode.after(
+                        {tagName: element.wlxmlNode.getTagName() || 'div', attrs: {'class': element.wlxmlNode.getClass() || 'p'}}
+                    );
+                    added.append({text: ''});
+                    return added;
+                }, {
+                    metadata: {
+                        description: gettext('Splitting text')
+                    },
+                    success: function(ret) {
+                        canvas.setCurrentElement(utils.getElementForNode(ret), {caretTo: 'start'});
+                    }
+                });
 
             } else {
 
 
             } else {
 
@@ -56,77 +146,144 @@ handlers.push({key: KEYS.ENTER,
                     return false; // top level element is unsplittable
                 }
 
                     return false; // top level element is unsplittable
                 }
 
-                var elements = position.element.split({offset: position.offset}),
-                    newEmpty,
-                    goto,
-                    gotoOptions;
+                var node = position.element.wlxmlNode,
+                    result, goto, gotoOptions;
 
 
-                if(position.offsetAtBeginning)
-                    newEmpty = elements.first;
-                else if(position.offsetAtEnd)
-                    newEmpty = elements.second;
-                
-                if(newEmpty) {
-                    goto = newEmpty.append(documentElement.DocumentTextElement.create({text: ''}, this));
+                node.document.transaction(function() {
+                    result = position.element.wlxmlNode.breakContent({offset: position.offset});
+                }, {
+                    metadata: {
+                        description: gettext('Splitting text')
+                    }
+                });
+
+                if(result.emptyText) {
+                    goto = result.emptyText;
                     gotoOptions = {};
                 } else {
                     gotoOptions = {};
                 } else {
-                    goto = elements.second;
+                    goto = result.second;
                     gotoOptions = {caretTo: 'start'};
                 }
 
                     gotoOptions = {caretTo: 'start'};
                 }
 
-                canvas.setCurrentElement(goto, gotoOptions);
+                canvas.setCurrentElement(utils.getElementForNode(goto), gotoOptions);
             }
         }
     }
 });
 
             }
         }
     }
 });
 
-handlers.push({keys: [KEYS.ARROW_UP, KEYS.ARROW_DOWN, KEYS.ARROW_LEFT, KEYS.ARROW_RIGHT],
+handlers.push({keys: [KEYS.ARROW_UP],
     keydown: function(event, canvas) {
     keydown: function(event, canvas) {
-        var position = canvas.getCursor().getPosition(),
-            element = position.element;
-        if(element && (element instanceof documentElement.DocumentTextElement) && element.isEmpty()) {
-            var direction, caretTo;
-            if(event.which === KEYS.ARROW_LEFT  || event.which === KEYS.ARROW_UP) {
-                direction = 'above';
-                caretTo = 'end';
-            } else {
-                direction = 'below';
-                caretTo = 'start';
+        /* globals window */
+        var element = canvas.getCursor().getPosition().element,
+            caretRect = window.getSelection().getRangeAt(0).getClientRects()[0],
+            frameRects = element.dom[0].getClientRects(),
+            caretTop = caretRect.bottom - caretRect.height,
+            position, target,rect, scrolled;
+
+        
+        if((frameRects[0].bottom === caretRect.bottom) || (caretRect.left < frameRects[0].left)) {
+            event.preventDefault();
+            canvas.rootWrapper.find('[document-text-element]').each(function() {
+                var test = getLastRectAbove(this, caretTop);
+                if(test) {
+                    target = this;
+                    rect = test;
+                } else {
+                    return false;
+                }
+            });
+            if(target) {
+                scrolled = scroll('top', target);
+                position = utils.caretPositionFromPoint(caretRect.left, rect.bottom - 1 - scrolled);
+                canvas.setCurrentElement(canvas.getDocumentElement(position.textNode), {caretTo: position.offset});
             }
             }
-            var el = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0]));
-            canvas.setCurrentElement(el, {caretTo: caretTo});
         }
         }
-    },
-    keyup: function(event, canvas) {
+    }
+});
+
+handlers.push({keys: [KEYS.ARROW_DOWN],
+    keydown: function(event, canvas) {
+        /* globals window */
         var element = canvas.getCursor().getPosition().element,
         var element = canvas.getCursor().getPosition().element,
-            caretTo = false;
-        if(!element) {
-            // Chrome hack
-            var direction;
-            if(event.which === KEYS.ARROW_LEFT  || event.which === KEYS.ARROW_UP) {
-                direction = 'above';
-                caretTo = 'end';
-            } else {
-                direction = 'below';
-                caretTo = 'start';
+            caretRect = window.getSelection().getRangeAt(0).getClientRects()[0],
+            frameRects = element.dom[0].getClientRects(),
+            lastRect = frameRects[frameRects.length-1],
+            position, target,rect, scrolled;
+
+        if(lastRect.bottom === caretRect.bottom || (caretRect.left > lastRect.left + lastRect.width)) {
+            event.preventDefault();
+            canvas.rootWrapper.find('[document-text-element]').each(function() {
+                var test = getFirstRectBelow(this, caretRect.bottom);
+                if(test) {
+                    target = this;
+                    rect = test;
+                    return false;
+                }
+            });
+            if(target) {
+                scrolled = scroll('bottom', target);
+                position = utils.caretPositionFromPoint(caretRect.left, rect.top +1 - scrolled);
+                canvas.setCurrentElement(canvas.getDocumentElement(position.textNode), {caretTo: position.offset});
             }
             }
-            element = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]:visible', direction, window.getSelection().focusNode));
         }
         }
-        canvas.setCurrentElement(element, {caretTo: caretTo});
     }
 });
 
     }
 });
 
+handlers.push({keys: [KEYS.ARROW_LEFT],
+    keydown: function(event, canvas) {
+        /* globals window */
+        var position = canvas.getCursor().getPosition(),
+            element = position.element,
+            prev;
+
+        if(position.offset === 0) {
+            event.preventDefault();
+            prev = canvas.getPreviousTextElement(element);
+            if(prev) {
+                scroll('top', prev.dom[0]);
+                canvas.setCurrentElement(canvas.getDocumentElement(prev.dom.contents()[0]), {caretTo: 'end'});
+            }
+        }
+    }
+});
+
+handlers.push({keys: [KEYS.ARROW_RIGHT],
+    keydown: function(event, canvas) {
+        /* globals window */
+        var position = canvas.getCursor().getPosition(),
+            element = position.element,
+            next;
+        if(position.offsetAtEnd) {
+            event.preventDefault();
+            next = canvas.getNextTextElement(element);
+            if(next) {
+                scroll('bottom', next.dom[0]);
+                canvas.setCurrentElement(canvas.getDocumentElement(next.dom.contents()[0]), {caretTo: 0});
+            }
+        } else {
+            var secondToLast = (position.offset === element.wlxmlNode.getText().length -1);
+            if(secondToLast) {
+                // Only Flying Spaghetti Monster knows why this is need for FF (for versions at least 26 to 31)
+                event.preventDefault();
+                canvas.setCurrentElement(element, {caretTo: 'end'});
+            }
+        }
+
+    }
+});
 
 var selectsWholeTextElement = function(cursor) {
 
 var selectsWholeTextElement = function(cursor) {
-    if(cursor.isSelecting() && cursor.getSelectionStart().offsetAtBeginning && cursor.getSelectionEnd().offsetAtEnd)
+    if(cursor.isSelecting() && cursor.getSelectionStart().offsetAtBeginning && cursor.getSelectionEnd().offsetAtEnd) {
         return true;
         return true;
+    }
     return false;
     return false;
-}
+};
 
 handlers.push({key: KEYS.X,
     keydown: function(event, canvas) {
 
 handlers.push({key: KEYS.X,
     keydown: function(event, canvas) {
-        if(event.ctrlKey && selectsWholeTextElement(canvas.getCursor()))
+        if(event.ctrlKey && selectsWholeTextElement(canvas.getCursor())) {
             event.preventDefault();
             event.preventDefault();
+        }
     }
 });
 
     }
 });
 
@@ -134,10 +291,57 @@ handlers.push({keys: [KEYS.BACKSPACE, KEYS.DELETE],
     keydown: function(event, canvas) {
         var cursor = canvas.getCursor(),
             position = canvas.getCursor().getPosition(),
     keydown: function(event, canvas) {
         var cursor = canvas.getCursor(),
             position = canvas.getCursor().getPosition(),
-            element = position.element;
+            element = position.element,
+            node = element ? element.wlxmlNode : null,
+            direction = 'above',
+            caretTo = 'end',
+            goto;
+
+        if(!element || !node) {
+            return;
+        }
+            
+        if(event.which === KEYS.DELETE) {
+            direction = 'below';
+            caretTo = 'start';
+        }
 
 
-        if(cursor.isSelecting() && !cursor.isSelectingWithinElement()) {
+        if(cursor.isSelecting()) {
             event.preventDefault();
             event.preventDefault();
+            var start = cursor.getSelectionStart(),
+                end = cursor.getSelectionEnd();
+
+            if(direction === 'above') {
+                if(start.offsetAtBeginning) {
+                    goto = canvas.getNearestTextElement('above', start.element);
+                    caretTo = 'end';
+                } else {
+                    goto = start.element;
+                    caretTo = start.offset;
+                }
+            } else {
+                if(end.offsetAtEnd) {
+                    goto = canvas.getNearestTextElement('below', start.element);
+                    caretTo = 'start';
+                } else {
+                    goto = end.element;
+                    caretTo = 0;
+                }
+            }
+
+            canvas.wlxmlDocument.deleteText({
+                from: {
+                    node: start.element.wlxmlNode,
+                    offset: start.offset
+                },
+                to: {
+                    node: end.element.wlxmlNode,
+                    offset: end.offset
+                }
+            });
+            if(goto) {
+                canvas.setCurrentElement(goto, {caretTo: caretTo});
+            }
             return;
         }
             
             return;
         }
             
@@ -148,50 +352,193 @@ handlers.push({keys: [KEYS.BACKSPACE, KEYS.DELETE],
 
         var willDeleteWholeText = function() {
             return element.getText().length === 1 || selectsWholeTextElement(cursor);
 
         var willDeleteWholeText = function() {
             return element.getText().length === 1 || selectsWholeTextElement(cursor);
-        }
+        };
 
 
-        if(willDeleteWholeText()) {
-            event.preventDefault();
-            element.setText('');
+        canvas.wlxmlDocument.transaction(function() {
+            if(willDeleteWholeText()) {
+                event.preventDefault();
+                node.setText('');
+            }
+            else if(cursorAtOperationEdge) {
+                if(direction === 'below') {
+                    element = canvas.getNearestTextElement(direction, element);
+                }
+                if(element && element.wlxmlNode.getIndex() === 0) {
+                    goto = element.wlxmlNode.parent().moveUp();
+                    if(goto) {
+                        canvas.setCurrentElement(goto.node, {caretTo: goto.offset});
+                    }
+                }
+                event.preventDefault();
+            }
+        }, {
+            metadata: {
+                description: gettext('Remove text')
+            }
+        });
+    }
+});
+
+var handleKeyEvent = function(e, s) {
+    keyEventHandlers.some(function(handler) {
+        if(handler.applies(e, s)) {
+            handler.run(e, s);
+            return true;
         }
         }
-        else if(element.isEmpty()) {
+    });
+};
+// todo: whileRemoveWholetext
+var keyEventHandlers = [
+    {
+        applies: function(e, s) {
+            return s.type === 'caret' && (
+                (s.isAtBeginning() && e.key === KEYS.BACKSPACE) ||
+                (s.isAtEnd() && e.key === KEYS.DELETE)
+            );
+        },
+        run: function(e,s) {
+            var direction, caretTo, cursorAtOperationEdge, goto, element;
 
 
-            var direction = 'above',
+            if(e.key === KEYS.BACKSPACE) {
+                direction = 'above';
                 caretTo = 'end';
                 caretTo = 'end';
-                
-            if(event.which === KEYS.DELETE) {
+                cursorAtOperationEdge = s.isAtBeginning();
+                element = s.element;
+            }
+            else {
                 direction = 'below';
                 caretTo = 'start';
                 direction = 'below';
                 caretTo = 'start';
+                cursorAtOperationEdge = s.isAtEnd();
+                element = cursorAtOperationEdge && s.canvas.getNearestTextElement(direction, s.element);
             }
 
             }
 
-            event.preventDefault();
+            if(!cursorAtOperationEdge || !element) {
+                return;
+            }
+
+            e.preventDefault();
+
+            s.canvas.wlxmlDocument.transaction(function() {
+                if(element.wlxmlNode.getIndex() === 0) {
+                    goto = element.wlxmlNode.parent().moveUp();
+                    if(goto) {
+                        s.canvas.setCurrentElement(goto.node, {caretTo: goto.offset});
+                    }
+                }
+            }, {
+                metadata: {
+                    description: gettext('Remove text')
+                }
+            });
+        }
+    },
 
 
-            var parent = element.parent(),
-                grandParent = parent ? parent.parent() : null,
+    {
+        applies: function(e,s) {
+            return s.type === 'caret' && s.element.getText().length === 1 && (e.key === KEYS.BACKSPACE || e.key === KEYS.DELETE);
+        },
+        run: function(e,s) {
+            e.preventDefault();
+            e.element.wlxmlNode.setText('');
+            s.canvas.setCurrentElement(s.element, {caretTo: 0});
+        }
+    },
+
+    {
+        applies: function(e, s) {
+            return s.type === 'textSelection' && (e.key === KEYS.BACKSPACE || e.key === KEYS.DELETE);
+        },
+        run: function(e, s) {
+            var direction = 'above',
+                caretTo = 'end',
                 goto;
                 goto;
-            if(parent.children().length === 1 && parent.children()[0].sameNode(element)) {
-                if(grandParent && grandParent.children().length === 1) {
-                    goto = grandParent.append({text: ''});
+
+            if(e.key === KEYS.DELETE) {
+                direction = 'below';
+                caretTo = 'start';
+            }
+
+            e.preventDefault();
+
+            if(s.startsAtBeginning && s.endsAtEnd && s.startElement.sameNode(s.endElement)) {
+                goto = s.startElement;
+                caretTo = s.startOffset;
+            } else if(direction === 'above') {
+                if(s.startsAtBeginning()) {
+                    goto = s.canvas.getNearestTextElement('above', s.startElement);
+                    caretTo = 'end';
                 } else {
                 } else {
-                    goto = element.getNearestTextElement(direction);
+                    goto = s.startElement;
+                    caretTo = s.startOffset;
                 }
                 }
-                parent.detach();
             } else {
             } else {
-                goto = element.getNearestTextElement(direction);
-                element.detach();
+                if(s.endsAtEnd()) {
+                    goto = s.canvas.getNearestTextElement('below', s.startElement);
+                    caretTo = 'start';
+                } else {
+                    goto = s.endElement;
+                    caretTo = 0;
+                }
             }
             }
-            canvas.setCurrentElement(goto, {caretTo: caretTo});
-            canvas.publisher('contentChanged');
+
+            var doc = s.canvas.wlxmlDocument;
+            doc.transaction(function() {
+                
+                doc.deleteText({
+                    from: {
+                        node: s.startElement.wlxmlNode,
+                        offset: s.startOffset
+                    },
+                    to: {
+                        node: s.endElement.wlxmlNode,
+                        offset: s.endOffset
+                    }
+                });
+
+            }, {
+                success: function() {
+                    if(goto) {
+                        s.canvas.setCurrentElement(goto, {caretTo: caretTo});
+                    }
+                }
+            });
+
         }
         }
-        else if(cursorAtOperationEdge) {
-            // todo
-            event.preventDefault();
+    },
+    {
+        applies: function(e, s) {
+            return s.type === 'caret' && e.key === KEYS.ENTER && !s.element.parent().isRootElement();
+        },
+        run: function(e, s) {
+            var result, goto, gotoOptions;
+            void(e);
+            e.preventDefault();
+            s.canvas.wlxmlDocument.transaction(function() {
+                result = s.element.wlxmlNode.breakContent({offset: s.offset});
+            }, {
+                metadata: {
+                    description: gettext('Splitting text'),
+                    fragment: s.toDocumentFragment()
+                }
+            });
+
+            if(result.emptyText) {
+                goto = result.emptyText;
+                gotoOptions = {};
+            } else {
+                goto = result.second;
+                gotoOptions = {caretTo: 'start'};
+            }
+
+            s.canvas.setCurrentElement(utils.getElementForNode(goto), gotoOptions);
         }
     }
         }
     }
-});
+];
 
 return {
 
 return {
-    handleKey: handleKey
+    handleKey: handleKey,
+    handleKeyEvent: handleKeyEvent,
+    KEYS: KEYS
 };
 
 });
\ No newline at end of file
 };
 
 });
\ No newline at end of file