From: Aleksander Łukasz Date: Fri, 9 Aug 2013 14:20:20 +0000 (+0200) Subject: Refactoring - moving key event handlers out of canvas object X-Git-Url: https://git.mdrn.pl/fnpeditor.git/commitdiff_plain/3150d85bc20dd7e15a2aa20ff647d76a7aa6ece5 Refactoring - moving key event handlers out of canvas object --- diff --git a/modules/documentCanvas/canvas/canvas.js b/modules/documentCanvas/canvas/canvas.js index 7428e10..4b43c8c 100644 --- a/modules/documentCanvas/canvas/canvas.js +++ b/modules/documentCanvas/canvas/canvas.js @@ -3,8 +3,9 @@ define([ 'libs/underscore-min', 'libs/backbone-min', 'modules/documentCanvas/canvas/documentElement', +'modules/documentCanvas/canvas/keyboard', 'modules/documentCanvas/canvas/utils' -], function($, _, Backbone, documentElement, utils) { +], function($, _, Backbone, documentElement, keyboard, utils) { 'use strict'; @@ -141,176 +142,9 @@ $.extend(Canvas.prototype, { this.d = this.wrapper.children(0); - var KEYS = { - ENTER: 13, - ARROW_LEFT: 37, - ARROW_UP: 38, - ARROW_RIGHT: 39, - ARROW_DOWN: 40, - BACKSPACE: 8, - DELETE: 46, - X: 88 - } - - this.wrapper.on('keyup', function(e) { - if(e.which >= 37 && e.which <= 40) { - var element = canvas.getCursor().getPosition().element, - caretTo = false; - if(!element) { - // Chrome hack - var direction; - if(e.which === KEYS.ARROW_LEFT || e.which === KEYS.ARROW_UP) { - direction = 'above'; - caretTo = 'end'; - } else { - direction = 'below'; - caretTo = 'start'; - } - element = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]:visible', direction, window.getSelection().focusNode)); - } - canvas.setCurrentElement(element, {caretTo: caretTo}); - } - }); - - this.wrapper.on('keydown', function(e) { - var cursor = canvas.getCursor(), - position = canvas.getCursor().getPosition(), - element = position.element; - if(e.which >= 37 && e.which <= 40) { - - if(element && (element instanceof documentElement.DocumentTextElement)) { - if(element.isEmpty()) { - var direction, caretTo; - if(e.which === KEYS.ARROW_LEFT || e.which === KEYS.ARROW_UP) { - direction = 'above'; - caretTo = 'end'; - } else { - direction = 'below'; - caretTo = 'start'; - } - var el = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); - canvas.setCurrentElement(el, {caretTo: caretTo}); - } else { - var txt = element.dom().contents()[0].data; - if(e.which === KEYS.ARROW_LEFT && position.offset > 1 && txt.charAt(position.offset-2) === utils.unicode.ZWS) { - e.preventDefault(); - canvas._moveCaretToTextElement(element, position.offset-2); - } - if(e.which === KEYS.ARROW_RIGHT && position.offset < txt.length - 1 && txt.charAt(position.offset+1) === utils.unicode.ZWS) { - e.preventDefault(); - canvas._moveCaretToTextElement(element, position.offset+2); - } - } - } - - - } - - var selectsWholeTextElement = function() { - if(cursor.isSelecting() && cursor.getSelectionStart().offsetAtBeginning && cursor.getSelectionEnd().offsetAtEnd) - return true; - return false; - } - - if(e.which === KEYS.X && e.ctrlKey && selectsWholeTextElement()) { - e.preventDefault(); - } - - if(e.which === KEYS.BACKSPACE || e.which === KEYS.DELETE) { - if(cursor.isSelecting() && !cursor.isSelectingWithinElement()) { - e.preventDefault(); - return; - } - - var cursorAtOperationEdge = position.offsetAtBeginning; - if(e.which === KEYS.DELETE) { - cursorAtOperationEdge = position.offsetAtEnd; - } - - var willDeleteWholeText = function() { - return element.getText().length === 1 || selectsWholeTextElement(); - } - - if(willDeleteWholeText()) { - e.preventDefault(); - element.setText(''); - } - else if(element.isEmpty()) { - - var direction = 'above', - caretTo = 'end'; - - if(e.which === KEYS.DELETE) { - direction = 'below'; - caretTo = 'start'; - } - - e.preventDefault(); - - var parent = element.parent(), - grandParent = parent ? parent.parent() : null, - goto; - if(parent.children().length === 1 && parent.children()[0].sameNode(element)) { - if(grandParent && grandParent.children().length === 1) { - goto = grandParent.append({text: ''}); - } else { - goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); - } - parent.detach(); - } else { - goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); - element.detach(); - } - canvas.setCurrentElement(goto, {caretTo: caretTo}); - canvas.publisher('contentChanged'); - } - else if(cursorAtOperationEdge) { - // todo - e.preventDefault(); - } - } - - if(e.which === KEYS.ENTER) { - e.preventDefault(); - var cursor = canvas.getCursor(), - position = cursor.getPosition(), - element = position.element; - - if(!cursor.isSelecting()) { - if(e.ctrlKey) { - var added = element.after({tag: 'block'}); - added.append({text:''}); - canvas.setCurrentElement(added, {caretTo: 'start'}); - - } else { - - if(!(element.parent().parent())) { - return false; // top level element is unsplittable - } - - var elements = position.element.split({offset: position.offset}), - newEmpty, - 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)); - gotoOptions = {}; - } else { - goto = elements.second; - gotoOptions = {caretTo: 'start'}; - } - - canvas.setCurrentElement(goto, gotoOptions); - } - } - } - }); + this.wrapper.on('keyup keydown keypress', function(e) { + keyboard.handleKey(e, this); + }.bind(this)); this.wrapper.on('click', '[document-node-element], [document-text-element]', function(e) { e.stopPropagation(); diff --git a/modules/documentCanvas/canvas/keyboard.js b/modules/documentCanvas/canvas/keyboard.js new file mode 100644 index 0000000..d851e3e --- /dev/null +++ b/modules/documentCanvas/canvas/keyboard.js @@ -0,0 +1,197 @@ +define([ +'modules/documentCanvas/canvas/documentElement', +'modules/documentCanvas/canvas/utils' +], function(documentElement, utils) { + +'use strict'; + + +var KEYS = { + ENTER: 13, + ARROW_LEFT: 37, + ARROW_UP: 38, + ARROW_RIGHT: 39, + ARROW_DOWN: 40, + BACKSPACE: 8, + DELETE: 46, + X: 88 +}; + +var handleKey = function(event, canvas) { + handlers.some(function(handler) { + if(handles(handler, event) && handler[event.type]) { + handler[event.type](event, canvas); + return true; + } + }); +}; + +var handles = function(handler, event) { + if(handler.key === event.which) + return true; + if(handler.keys && handler.keys.indexOf(event.which) !== -1) + return true; + return false; +}; + +var handlers = []; + + +handlers.push({key: KEYS.ENTER, + keydown: function(event, canvas) { + event.preventDefault(); + var cursor = canvas.getCursor(), + position = cursor.getPosition(), + element = position.element; + + if(!cursor.isSelecting()) { + if(event.ctrlKey) { + var added = element.after({tag: 'block'}); + added.append({text:''}); + canvas.setCurrentElement(added, {caretTo: 'start'}); + + } else { + + if(!(element.parent().parent())) { + return false; // top level element is unsplittable + } + + var elements = position.element.split({offset: position.offset}), + newEmpty, + 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)); + gotoOptions = {}; + } else { + goto = elements.second; + gotoOptions = {caretTo: 'start'}; + } + + canvas.setCurrentElement(goto, gotoOptions); + } + } + } +}); + +handlers.push({keys: [KEYS.ARROW_UP, KEYS.ARROW_DOWN, KEYS.ARROW_LEFT, KEYS.ARROW_RIGHT], + 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'; + } + var el = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); + canvas.setCurrentElement(el, {caretTo: caretTo}); + } + }, + keyup: function(event, canvas) { + 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'; + } + element = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]:visible', direction, window.getSelection().focusNode)); + } + canvas.setCurrentElement(element, {caretTo: caretTo}); + } +}); + + +var selectsWholeTextElement = function(cursor) { + if(cursor.isSelecting() && cursor.getSelectionStart().offsetAtBeginning && cursor.getSelectionEnd().offsetAtEnd) + return true; + return false; +} + +handlers.push({key: KEYS.X, + keydown: function(event, canvas) { + if(event.ctrlKey && selectsWholeTextElement(canvas.getCursor())) + event.preventDefault(); + } +}); + +handlers.push({keys: [KEYS.BACKSPACE, KEYS.DELETE], + keydown: function(event, canvas) { + var cursor = canvas.getCursor(), + position = canvas.getCursor().getPosition(), + element = position.element; + + if(cursor.isSelecting() && !cursor.isSelectingWithinElement()) { + event.preventDefault(); + return; + } + + var cursorAtOperationEdge = position.offsetAtBeginning; + if(event.which === KEYS.DELETE) { + cursorAtOperationEdge = position.offsetAtEnd; + } + + var willDeleteWholeText = function() { + return element.getText().length === 1 || selectsWholeTextElement(cursor); + } + + if(willDeleteWholeText()) { + event.preventDefault(); + element.setText(''); + } + else if(element.isEmpty()) { + + var direction = 'above', + caretTo = 'end'; + + if(event.which === KEYS.DELETE) { + direction = 'below'; + caretTo = 'start'; + } + + event.preventDefault(); + + var parent = element.parent(), + grandParent = parent ? parent.parent() : null, + goto; + if(parent.children().length === 1 && parent.children()[0].sameNode(element)) { + if(grandParent && grandParent.children().length === 1) { + goto = grandParent.append({text: ''}); + } else { + goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); + } + parent.detach(); + } else { + goto = canvas.getDocumentElement(utils.nearestInDocumentOrder('[document-text-element]', direction, element.dom()[0])); + element.detach(); + } + canvas.setCurrentElement(goto, {caretTo: caretTo}); + canvas.publisher('contentChanged'); + } + else if(cursorAtOperationEdge) { + // todo + event.preventDefault(); + } + } +}); + +return { + handleKey: handleKey +}; + +}); \ No newline at end of file