157 lines
5.3 KiB
JavaScript
Executable File
157 lines
5.3 KiB
JavaScript
Executable File
/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2010, Ajax.org B.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Ajax.org B.V. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var dom = require("../lib/dom");
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var Lines = function(element, canvasHeight) {
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this.element = element;
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this.canvasHeight = canvasHeight || 500000;
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this.element.style.height = (this.canvasHeight * 2) + "px";
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this.cells = [];
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this.cellCache = [];
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this.$offsetCoefficient = 0;
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};
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(function() {
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this.moveContainer = function(config) {
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dom.translate(this.element, 0, -((config.firstRowScreen * config.lineHeight) % this.canvasHeight) - config.offset * this.$offsetCoefficient);
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};
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this.pageChanged = function(oldConfig, newConfig) {
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return (
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Math.floor((oldConfig.firstRowScreen * oldConfig.lineHeight) / this.canvasHeight) !==
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Math.floor((newConfig.firstRowScreen * newConfig.lineHeight) / this.canvasHeight)
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);
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};
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this.computeLineTop = function(row, config, session) {
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var screenTop = config.firstRowScreen * config.lineHeight;
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var screenPage = Math.floor(screenTop / this.canvasHeight);
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var lineTop = session.documentToScreenRow(row, 0) * config.lineHeight;
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return lineTop - (screenPage * this.canvasHeight);
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};
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this.computeLineHeight = function(row, config, session) {
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return config.lineHeight * session.getRowLength(row);
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};
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this.getLength = function() {
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return this.cells.length;
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};
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this.get = function(index) {
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return this.cells[index];
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};
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this.shift = function() {
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this.$cacheCell(this.cells.shift());
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};
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this.pop = function() {
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this.$cacheCell(this.cells.pop());
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};
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this.push = function(cell) {
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if (Array.isArray(cell)) {
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this.cells.push.apply(this.cells, cell);
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var fragment = dom.createFragment(this.element);
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for (var i=0; i<cell.length; i++) {
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fragment.appendChild(cell[i].element);
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}
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this.element.appendChild(fragment);
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} else {
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this.cells.push(cell);
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this.element.appendChild(cell.element);
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}
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};
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this.unshift = function(cell) {
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if (Array.isArray(cell)) {
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this.cells.unshift.apply(this.cells, cell);
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var fragment = dom.createFragment(this.element);
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for (var i=0; i<cell.length; i++) {
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fragment.appendChild(cell[i].element);
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}
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if (this.element.firstChild)
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this.element.insertBefore(fragment, this.element.firstChild);
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else
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this.element.appendChild(fragment);
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} else {
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this.cells.unshift(cell);
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this.element.insertAdjacentElement("afterbegin", cell.element);
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}
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};
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this.last = function() {
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if (this.cells.length)
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return this.cells[this.cells.length-1];
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else
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return null;
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};
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this.$cacheCell = function(cell) {
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if (!cell)
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return;
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cell.element.remove();
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this.cellCache.push(cell);
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};
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this.createCell = function(row, config, session, initElement) {
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var cell = this.cellCache.pop();
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if (!cell) {
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var element = dom.createElement("div");
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if (initElement)
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initElement(element);
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this.element.appendChild(element);
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cell = {
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element: element,
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text: "",
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row: row
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};
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}
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cell.row = row;
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return cell;
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};
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}).call(Lines.prototype);
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exports.Lines = Lines;
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});
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