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- /* ***** BEGIN LICENSE BLOCK *****
- * Distributed under the BSD license:
- *
- * Copyright (c) 2010, Ajax.org B.V.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Ajax.org B.V. nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ***** END LICENSE BLOCK ***** */
- define(function(require, exports, module) {
- "use strict";
- var dom = require("../lib/dom");
- var isIE8;
- var Cursor = function(parentEl) {
- this.element = dom.createElement("div");
- this.element.className = "ace_layer ace_cursor-layer";
- parentEl.appendChild(this.element);
-
- if (isIE8 === undefined)
- isIE8 = !("opacity" in this.element.style);
- this.isVisible = false;
- this.isBlinking = true;
- this.blinkInterval = 1000;
- this.smoothBlinking = false;
- this.cursors = [];
- this.cursor = this.addCursor();
- dom.addCssClass(this.element, "ace_hidden-cursors");
- this.$updateCursors = (isIE8
- ? this.$updateVisibility
- : this.$updateOpacity).bind(this);
- };
- (function() {
-
- this.$updateVisibility = function(val) {
- var cursors = this.cursors;
- for (var i = cursors.length; i--; )
- cursors[i].style.visibility = val ? "" : "hidden";
- };
- this.$updateOpacity = function(val) {
- var cursors = this.cursors;
- for (var i = cursors.length; i--; )
- cursors[i].style.opacity = val ? "" : "0";
- };
-
- this.$padding = 0;
- this.setPadding = function(padding) {
- this.$padding = padding;
- };
- this.setSession = function(session) {
- this.session = session;
- };
- this.setBlinking = function(blinking) {
- if (blinking != this.isBlinking){
- this.isBlinking = blinking;
- this.restartTimer();
- }
- };
- this.setBlinkInterval = function(blinkInterval) {
- if (blinkInterval != this.blinkInterval){
- this.blinkInterval = blinkInterval;
- this.restartTimer();
- }
- };
- this.setSmoothBlinking = function(smoothBlinking) {
- if (smoothBlinking != this.smoothBlinking && !isIE8) {
- this.smoothBlinking = smoothBlinking;
- dom.setCssClass(this.element, "ace_smooth-blinking", smoothBlinking);
- this.$updateCursors(true);
- this.$updateCursors = (this.$updateOpacity).bind(this);
- this.restartTimer();
- }
- };
- this.addCursor = function() {
- var el = dom.createElement("div");
- el.className = "ace_cursor";
- this.element.appendChild(el);
- this.cursors.push(el);
- return el;
- };
- this.removeCursor = function() {
- if (this.cursors.length > 1) {
- var el = this.cursors.pop();
- el.parentNode.removeChild(el);
- return el;
- }
- };
- this.hideCursor = function() {
- this.isVisible = false;
- dom.addCssClass(this.element, "ace_hidden-cursors");
- this.restartTimer();
- };
- this.showCursor = function() {
- this.isVisible = true;
- dom.removeCssClass(this.element, "ace_hidden-cursors");
- this.restartTimer();
- };
- this.restartTimer = function() {
- var update = this.$updateCursors;
- clearInterval(this.intervalId);
- clearTimeout(this.timeoutId);
- if (this.smoothBlinking) {
- dom.removeCssClass(this.element, "ace_smooth-blinking");
- }
-
- update(true);
- if (!this.isBlinking || !this.blinkInterval || !this.isVisible)
- return;
- if (this.smoothBlinking) {
- setTimeout(function(){
- dom.addCssClass(this.element, "ace_smooth-blinking");
- }.bind(this));
- }
-
- var blink = function(){
- this.timeoutId = setTimeout(function() {
- update(false);
- }, 0.6 * this.blinkInterval);
- }.bind(this);
- this.intervalId = setInterval(function() {
- update(true);
- blink();
- }, this.blinkInterval);
- blink();
- };
- this.getPixelPosition = function(position, onScreen) {
- if (!this.config || !this.session)
- return {left : 0, top : 0};
- if (!position)
- position = this.session.selection.getCursor();
- var pos = this.session.documentToScreenPosition(position);
- var cursorLeft = this.$padding + pos.column * this.config.characterWidth;
- var cursorTop = (pos.row - (onScreen ? this.config.firstRowScreen : 0)) *
- this.config.lineHeight;
- return {left : cursorLeft, top : cursorTop};
- };
- this.update = function(config) {
- this.config = config;
- var selections = this.session.$selectionMarkers;
- var i = 0, cursorIndex = 0;
- if (selections === undefined || selections.length === 0){
- selections = [{cursor: null}];
- }
- for (var i = 0, n = selections.length; i < n; i++) {
- var pixelPos = this.getPixelPosition(selections[i].cursor, true);
- if ((pixelPos.top > config.height + config.offset ||
- pixelPos.top < 0) && i > 1) {
- continue;
- }
- var style = (this.cursors[cursorIndex++] || this.addCursor()).style;
-
- if (!this.drawCursor) {
- style.left = pixelPos.left + "px";
- style.top = pixelPos.top + "px";
- style.width = config.characterWidth + "px";
- style.height = config.lineHeight + "px";
- } else {
- this.drawCursor(style, pixelPos, config, selections[i], this.session);
- }
- }
- while (this.cursors.length > cursorIndex)
- this.removeCursor();
- var overwrite = this.session.getOverwrite();
- this.$setOverwrite(overwrite);
- // cache for textarea and gutter highlight
- this.$pixelPos = pixelPos;
- this.restartTimer();
- };
-
- this.drawCursor = null;
- this.$setOverwrite = function(overwrite) {
- if (overwrite != this.overwrite) {
- this.overwrite = overwrite;
- if (overwrite)
- dom.addCssClass(this.element, "ace_overwrite-cursors");
- else
- dom.removeCssClass(this.element, "ace_overwrite-cursors");
- }
- };
- this.destroy = function() {
- clearInterval(this.intervalId);
- clearTimeout(this.timeoutId);
- };
- }).call(Cursor.prototype);
- exports.Cursor = Cursor;
- });
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