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1676 lines (1443 loc) · 54.3 KB
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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 oop = require("./lib/oop");
var dom = require("./lib/dom");
var useragent = require("./lib/useragent");
var config = require("./config");
var GutterLayer = require("./layer/gutter").Gutter;
var MarkerLayer = require("./layer/marker").Marker;
var TextLayer = require("./layer/text").Text;
var CursorLayer = require("./layer/cursor").Cursor;
var ScrollBarH = require("./scrollbar").ScrollBarH;
var ScrollBarV = require("./scrollbar").ScrollBarV;
var RenderLoop = require("./renderloop").RenderLoop;
var EventEmitter = require("./lib/event_emitter").EventEmitter;
var editorCss = require("./requirejs/text!./css/editor.css");
dom.importCssString(editorCss, "ace_editor");
/**
* The class that is responsible for drawing everything you see on the screen!
* @class VirtualRenderer
**/
/**
* Constructs a new `VirtualRenderer` within the `container` specified, applying the given `theme`.
* @param {DOMElement} container The root element of the editor
* @param {String} theme The starting theme
*
* @constructor
**/
var VirtualRenderer = function(container, theme) {
var _self = this;
this.container = container || dom.createElement("div");
// TODO: this breaks rendering in Cloud9 with multiple ace instances
// // Imports CSS once per DOM document ('ace_editor' serves as an identifier).
// dom.importCssString(editorCss, "ace_editor", container.ownerDocument);
// in IE <= 9 the native cursor always shines through
this.$keepTextAreaAtCursor = !useragent.isIE;
dom.addCssClass(this.container, "ace_editor");
this.setTheme(theme);
this.$gutter = dom.createElement("div");
this.$gutter.className = "ace_gutter";
this.container.appendChild(this.$gutter);
this.scroller = dom.createElement("div");
this.scroller.className = "ace_scroller";
this.container.appendChild(this.scroller);
this.content = dom.createElement("div");
this.content.className = "ace_content";
this.scroller.appendChild(this.content);
this.$gutterLayer = new GutterLayer(this.$gutter);
this.$gutterLayer.on("changeGutterWidth", this.onGutterResize.bind(this));
this.$markerBack = new MarkerLayer(this.content);
var textLayer = this.$textLayer = new TextLayer(this.content);
this.canvas = textLayer.element;
this.$markerFront = new MarkerLayer(this.content);
this.$cursorLayer = new CursorLayer(this.content);
// Indicates whether the horizontal scrollbar is visible
this.$horizScroll = false;
this.$vScroll = false;
this.scrollBar =
this.scrollBarV = new ScrollBarV(this.container, this);
this.scrollBarH = new ScrollBarH(this.container, this);
this.scrollBarV.addEventListener("scroll", function(e) {
if (!_self.$scrollAnimation)
_self.session.setScrollTop(e.data - _self.scrollMargin.top);
});
this.scrollBarH.addEventListener("scroll", function(e) {
if (!_self.$scrollAnimation)
_self.session.setScrollLeft(e.data - _self.scrollMargin.left);
});
this.scrollTop = 0;
this.scrollLeft = 0;
this.cursorPos = {
row : 0,
column : 0
};
this.$textLayer.addEventListener("changeCharacterSize", function() {
_self.updateCharacterSize();
_self.onResize(true);
_self._signal("changeCharacterSize");
});
this.$size = {
width: 0,
height: 0,
scrollerHeight: 0,
scrollerWidth: 0
};
this.layerConfig = {
width : 1,
padding : 0,
firstRow : 0,
firstRowScreen: 0,
lastRow : 0,
lineHeight : 0,
characterWidth : 0,
minHeight : 1,
maxHeight : 1,
offset : 0,
height : 1
};
this.scrollMargin = {
left: 0,
right: 0,
top: 0,
bottom: 0,
v: 0,
h: 0
};
this.$loop = new RenderLoop(
this.$renderChanges.bind(this),
this.container.ownerDocument.defaultView
);
this.$loop.schedule(this.CHANGE_FULL);
this.updateCharacterSize();
this.setPadding(4);
config.resetOptions(this);
config._emit("renderer", this);
};
(function() {
this.CHANGE_CURSOR = 1;
this.CHANGE_MARKER = 2;
this.CHANGE_GUTTER = 4;
this.CHANGE_SCROLL = 8;
this.CHANGE_LINES = 16;
this.CHANGE_TEXT = 32;
this.CHANGE_SIZE = 64;
this.CHANGE_MARKER_BACK = 128;
this.CHANGE_MARKER_FRONT = 256;
this.CHANGE_FULL = 512;
this.CHANGE_H_SCROLL = 1024;
// this.$logChanges = function(changes) {
// var a = ""
// if (changes & this.CHANGE_CURSOR) a += " cursor";
// if (changes & this.CHANGE_MARKER) a += " marker";
// if (changes & this.CHANGE_GUTTER) a += " gutter";
// if (changes & this.CHANGE_SCROLL) a += " scroll";
// if (changes & this.CHANGE_LINES) a += " lines";
// if (changes & this.CHANGE_TEXT) a += " text";
// if (changes & this.CHANGE_SIZE) a += " size";
// if (changes & this.CHANGE_MARKER_BACK) a += " marker_back";
// if (changes & this.CHANGE_MARKER_FRONT) a += " marker_front";
// if (changes & this.CHANGE_FULL) a += " full";
// if (changes & this.CHANGE_H_SCROLL) a += " h_scroll";
// console.log(a.trim())
// };
oop.implement(this, EventEmitter);
this.updateCharacterSize = function() {
if (this.$textLayer.allowBoldFonts != this.$allowBoldFonts) {
this.$allowBoldFonts = this.$textLayer.allowBoldFonts;
this.setStyle("ace_nobold", !this.$allowBoldFonts);
}
this.layerConfig.characterWidth =
this.characterWidth = this.$textLayer.getCharacterWidth();
this.layerConfig.lineHeight =
this.lineHeight = this.$textLayer.getLineHeight();
this.$updatePrintMargin();
};
/**
*
* Associates the renderer with an [[EditSession `EditSession`]].
**/
this.setSession = function(session) {
this.session = session;
this.scroller.className = "ace_scroller";
this.$cursorLayer.setSession(session);
this.$markerBack.setSession(session);
this.$markerFront.setSession(session);
this.$gutterLayer.setSession(session);
this.$textLayer.setSession(session);
this.$loop.schedule(this.CHANGE_FULL);
};
/**
* Triggers a partial update of the text, from the range given by the two parameters.
* @param {Number} firstRow The first row to update
* @param {Number} lastRow The last row to update
*
*
**/
this.updateLines = function(firstRow, lastRow) {
if (lastRow === undefined)
lastRow = Infinity;
if (!this.$changedLines) {
this.$changedLines = {
firstRow: firstRow,
lastRow: lastRow
};
}
else {
if (this.$changedLines.firstRow > firstRow)
this.$changedLines.firstRow = firstRow;
if (this.$changedLines.lastRow < lastRow)
this.$changedLines.lastRow = lastRow;
}
if (this.$changedLines.firstRow > this.layerConfig.lastRow ||
this.$changedLines.lastRow < this.layerConfig.firstRow)
return;
this.$loop.schedule(this.CHANGE_LINES);
};
this.onChangeTabSize = function() {
this.$loop.schedule(this.CHANGE_TEXT | this.CHANGE_MARKER);
this.$textLayer.onChangeTabSize();
};
/**
* Triggers a full update of the text, for all the rows.
**/
this.updateText = function() {
this.$loop.schedule(this.CHANGE_TEXT);
};
/**
* Triggers a full update of all the layers, for all the rows.
* @param {Boolean} force If `true`, forces the changes through
*
*
**/
this.updateFull = function(force) {
if (force)
this.$renderChanges(this.CHANGE_FULL, true);
else
this.$loop.schedule(this.CHANGE_FULL);
};
/**
*
* Updates the font size.
**/
this.updateFontSize = function() {
this.$textLayer.checkForSizeChanges();
};
this.$changes = 0;
/**
* [Triggers a resize of the editor.]{: #VirtualRenderer.onResize}
* @param {Boolean} force If `true`, recomputes the size, even if the height and width haven't changed
* @param {Number} gutterWidth The width of the gutter in pixels
* @param {Number} width The width of the editor in pixels
* @param {Number} height The hiehgt of the editor, in pixels
*
*
**/
this.onResize = function(force, gutterWidth, width, height) {
// if (force)
// console.log("force resize requested", width, height)
if (this.resizing > 2)
return;
else if (this.resizing > 0)
this.resizing++;
else
this.resizing = force ? 1 : 0;
// `|| el.scrollHeight` is required for outosizing editors on ie
// where elements with clientHeight = 0 alsoe have clientWidth = 0
var el = this.container;
if (!height)
height = el.clientHeight || el.scrollHeight;
if (!width)
width = el.clientWidth || el.scrollWidth;
var changes = this.$updateCachedSize(force, gutterWidth, width, height);
// console.log("resizing to", width, height, JSON.stringify(this.$size))
// setTimeout(function() {
// console.log("actual size ", this.container.clientWidth, this.container.clientHeight)
// }.bind(this), 500)
if (!this.$size.scrollerHeight || (!width && !height))
return this.resizing = 0;
if (force)
this.$gutterLayer.$padding = null;
if (force)
this.$renderChanges(changes, true);
else
this.$loop.schedule(changes | this.$changes);
if (this.resizing)
this.resizing = 0;
};
this.$updateCachedSize = function(force, gutterWidth, width, height) {
var changes = 0;
var size = this.$size;
var oldSize = {
width: size.width,
height: size.height,
scrollerHeight: size.scrollerHeight,
scrollerWidth: size.scrollerWidth
};
if (height && (force || size.height != height)) {
size.height = height;
changes = this.CHANGE_SIZE;
size.scrollerHeight = size.height;
if (this.$horizScroll)
size.scrollerHeight -= this.scrollBarH.getHeight();
// this.scrollBarV.setHeight(size.scrollerHeight);
this.scrollBarV.element.style.bottom = this.scrollBarH.getHeight() + "px";
if (this.session) {
this.session.setScrollTop(this.getScrollTop());
changes = changes | this.CHANGE_SCROLL;
}
}
if (width && (force || size.width != width)) {
changes = this.CHANGE_SIZE;
size.width = width;
if (gutterWidth == null)
gutterWidth = this.$showGutter ? this.$gutter.offsetWidth : 0;
this.gutterWidth = gutterWidth;
this.scrollBarH.element.style.left =
this.scroller.style.left = gutterWidth + "px";
size.scrollerWidth = Math.max(0, width - gutterWidth - this.scrollBarV.getWidth());
this.scrollBarH.element.style.right =
this.scroller.style.right = this.scrollBarV.getWidth() + "px";
this.scroller.style.bottom = this.scrollBarH.getHeight() + "px";
// this.scrollBarH.element.style.setWidth(size.scrollerWidth);
if (this.session && this.session.getUseWrapMode() && this.adjustWrapLimit() || force)
changes = changes | this.CHANGE_FULL;
}
if (changes)
this._signal("resize", oldSize);
return changes;
};
this.onGutterResize = function() {
var gutterWidth = this.$showGutter ? this.$gutter.offsetWidth : 0;
if (gutterWidth != this.gutterWidth)
this.$changes |= this.$updateCachedSize(true, gutterWidth, this.$size.width, this.$size.height);
if (this.session.getUseWrapMode() && this.adjustWrapLimit())
this.$loop.schedule(this.CHANGE_FULL);
else {
this.$computeLayerConfig();
this.$loop.schedule(this.CHANGE_MARKER);
}
};
/**
* Adjusts the wrap limit, which is the number of characters that can fit within the width of the edit area on screen.
**/
this.adjustWrapLimit = function() {
var availableWidth = this.$size.scrollerWidth - this.$padding * 2;
var limit = Math.floor(availableWidth / this.characterWidth);
return this.session.adjustWrapLimit(limit, this.$showPrintMargin && this.$printMarginColumn);
};
/**
* Identifies whether you want to have an animated scroll or not.
* @param {Boolean} shouldAnimate Set to `true` to show animated scrolls
*
**/
this.setAnimatedScroll = function(shouldAnimate){
this.setOption("animatedScroll", shouldAnimate);
};
/**
* Returns whether an animated scroll happens or not.
* @returns {Boolean}
**/
this.getAnimatedScroll = function() {
return this.$animatedScroll;
};
/**
* Identifies whether you want to show invisible characters or not.
* @param {Boolean} showInvisibles Set to `true` to show invisibles
*
**/
this.setShowInvisibles = function(showInvisibles) {
this.setOption("showInvisibles", showInvisibles);
};
/**
* Returns whether invisible characters are being shown or not.
* @returns {Boolean}
**/
this.getShowInvisibles = function() {
return this.getOption("showInvisibles");
};
this.getDisplayIndentGuides = function() {
return this.getOption("displayIndentGuides");
};
this.setDisplayIndentGuides = function(display) {
this.setOption("displayIndentGuides", display);
};
/**
* Identifies whether you want to show the print margin or not.
* @param {Boolean} showPrintMargin Set to `true` to show the print margin
*
**/
this.setShowPrintMargin = function(showPrintMargin) {
this.setOption("showPrintMargin", showPrintMargin);
};
/**
* Returns whether the print margin is being shown or not.
* @returns {Boolean}
**/
this.getShowPrintMargin = function() {
return this.getOption("showPrintMargin");
};
/**
* Identifies whether you want to show the print margin column or not.
* @param {Boolean} showPrintMargin Set to `true` to show the print margin column
*
**/
this.setPrintMarginColumn = function(showPrintMargin) {
this.setOption("printMarginColumn", showPrintMargin);
};
/**
* Returns whether the print margin column is being shown or not.
* @returns {Boolean}
**/
this.getPrintMarginColumn = function() {
return this.getOption("printMarginColumn");
};
/**
* Returns `true` if the gutter is being shown.
* @returns {Boolean}
**/
this.getShowGutter = function(){
return this.getOption("showGutter");
};
/**
* Identifies whether you want to show the gutter or not.
* @param {Boolean} show Set to `true` to show the gutter
*
**/
this.setShowGutter = function(show){
return this.setOption("showGutter", show);
};
this.getFadeFoldWidgets = function(){
return this.getOption("fadeFoldWidgets")
};
this.setFadeFoldWidgets = function(show) {
this.setOption("fadeFoldWidgets", show);
};
this.setHighlightGutterLine = function(shouldHighlight) {
this.setOption("highlightGutterLine", shouldHighlight);
};
this.getHighlightGutterLine = function() {
return this.getOption("highlightGutterLine");
};
this.$updateGutterLineHighlight = function() {
var pos = this.$cursorLayer.$pixelPos;
var height = this.layerConfig.lineHeight;
if (this.session.getUseWrapMode()) {
var cursor = this.session.selection.getCursor();
cursor.column = 0;
pos = this.$cursorLayer.getPixelPosition(cursor, true);
height *= this.session.getRowLength(cursor.row);
}
this.$gutterLineHighlight.style.top = pos.top - this.layerConfig.offset + "px";
this.$gutterLineHighlight.style.height = height + "px";
};
this.$updatePrintMargin = function() {
if (!this.$showPrintMargin && !this.$printMarginEl)
return;
if (!this.$printMarginEl) {
var containerEl = dom.createElement("div");
containerEl.className = "ace_layer ace_print-margin-layer";
this.$printMarginEl = dom.createElement("div");
this.$printMarginEl.className = "ace_print-margin";
containerEl.appendChild(this.$printMarginEl);
this.content.insertBefore(containerEl, this.content.firstChild);
}
var style = this.$printMarginEl.style;
style.left = ((this.characterWidth * this.$printMarginColumn) + this.$padding) + "px";
style.visibility = this.$showPrintMargin ? "visible" : "hidden";
if (this.session && this.session.$wrap == -1)
this.adjustWrapLimit();
};
/**
*
* Returns the root element containing this renderer.
* @returns {DOMElement}
**/
this.getContainerElement = function() {
return this.container;
};
/**
*
* Returns the element that the mouse events are attached to
* @returns {DOMElement}
**/
this.getMouseEventTarget = function() {
return this.content;
};
/**
*
* Returns the element to which the hidden text area is added.
* @returns {DOMElement}
**/
this.getTextAreaContainer = function() {
return this.container;
};
// move text input over the cursor
// this is required for iOS and IME
this.$moveTextAreaToCursor = function() {
if (!this.$keepTextAreaAtCursor)
return;
var config = this.layerConfig;
var posTop = this.$cursorLayer.$pixelPos.top;
var posLeft = this.$cursorLayer.$pixelPos.left;
posTop -= config.offset;
var h = this.lineHeight;
if (posTop < 0 || posTop > config.height - h)
return;
var w = this.characterWidth;
if (this.$composition) {
var val = this.textarea.value.replace(/^\x01+/, "");
w *= (this.session.$getStringScreenWidth(val)[0]+2);
h += 2;
posTop -= 1;
}
posLeft -= this.scrollLeft;
if (posLeft > this.$size.scrollerWidth - w)
posLeft = this.$size.scrollerWidth - w;
posLeft -= this.scrollBar.width;
this.textarea.style.height = h + "px";
this.textarea.style.width = w + "px";
this.textarea.style.right = Math.max(0, this.$size.scrollerWidth - posLeft - w) + "px";
this.textarea.style.bottom = Math.max(0, this.$size.height - posTop - h) + "px";
};
/**
*
* [Returns the index of the first visible row.]{: #VirtualRenderer.getFirstVisibleRow}
* @returns {Number}
**/
this.getFirstVisibleRow = function() {
return this.layerConfig.firstRow;
};
/**
*
* Returns the index of the first fully visible row. "Fully" here means that the characters in the row are not truncated; that the top and the bottom of the row are on the screen.
* @returns {Number}
**/
this.getFirstFullyVisibleRow = function() {
return this.layerConfig.firstRow + (this.layerConfig.offset === 0 ? 0 : 1);
};
/**
*
* Returns the index of the last fully visible row. "Fully" here means that the characters in the row are not truncated; that the top and the bottom of the row are on the screen.
* @returns {Number}
**/
this.getLastFullyVisibleRow = function() {
var flint = Math.floor((this.layerConfig.height + this.layerConfig.offset) / this.layerConfig.lineHeight);
return this.layerConfig.firstRow - 1 + flint;
};
/**
*
* [Returns the index of the last visible row.]{: #VirtualRenderer.getLastVisibleRow}
* @returns {Number}
**/
this.getLastVisibleRow = function() {
return this.layerConfig.lastRow;
};
this.$padding = null;
/**
* Sets the padding for all the layers.
* @param {Number} padding A new padding value (in pixels)
*
*
*
**/
this.setPadding = function(padding) {
this.$padding = padding;
this.$textLayer.setPadding(padding);
this.$cursorLayer.setPadding(padding);
this.$markerFront.setPadding(padding);
this.$markerBack.setPadding(padding);
this.$loop.schedule(this.CHANGE_FULL);
this.$updatePrintMargin();
};
this.setScrollMargin = function(top, bottom, left, right) {
var sm = this.scrollMargin;
sm.top = top|0;
sm.bottom = bottom|0;
sm.right = right|0;
sm.left = left|0;
sm.v = sm.top + sm.bottom;
sm.h = sm.left + sm.right;
this.updateFull();
};
/**
* Returns whether the horizontal scrollbar is set to be always visible.
* @returns {Boolean}
**/
this.getHScrollBarAlwaysVisible = function() {
return this.$hScrollBarAlwaysVisible;
};
/**
* Identifies whether you want to show the horizontal scrollbar or not.
* @param {Boolean} alwaysVisible Set to `true` to make the horizontal scroll bar visible
**/
this.setHScrollBarAlwaysVisible = function(alwaysVisible) {
this.setOption("hScrollBarAlwaysVisible", alwaysVisible);
};
/**
* Returns whether the horizontal scrollbar is set to be always visible.
* @returns {Boolean}
**/
this.getVScrollBarAlwaysVisible = function() {
return this.$hScrollBarAlwaysVisible;
};
/**
* Identifies whether you want to show the horizontal scrollbar or not.
* @param {Boolean} alwaysVisible Set to `true` to make the horizontal scroll bar visible
**/
this.setVScrollBarAlwaysVisible = function(alwaysVisible) {
this.setOption("vScrollBarAlwaysVisible", alwaysVisible);
};
this.$updateScrollBarV = function() {
this.scrollBarV.setInnerHeight(this.layerConfig.maxHeight + this.scrollMargin.v);
this.scrollBarV.setScrollTop(this.scrollTop + this.scrollMargin.top);
};
this.$updateScrollBarH = function() {
this.scrollBarH.setInnerWidth(this.layerConfig.width + 2 * this.$padding + this.scrollMargin.h);
this.scrollBarH.setScrollLeft(this.scrollLeft + this.scrollMargin.left);
};
this.$renderChanges = function(changes, force) {
if (this.$changes) {
changes |= this.$changes;
this.$changes = 0;
}
if ((!this.session || !this.container.offsetWidth) || (!changes && !force)) {
this.$changes |= changes;
return;
}
if (!this.$size.width) {
this.$changes |= changes;
return this.onResize(true);
}
if (!this.lineHeight) {
this.$textLayer.checkForSizeChanges();
}
// this.$logChanges(changes);
this._signal("beforeRender");
// text, scrolling and resize changes can cause the view port size to change
if (changes & this.CHANGE_FULL ||
changes & this.CHANGE_SIZE ||
changes & this.CHANGE_TEXT ||
changes & this.CHANGE_LINES ||
changes & this.CHANGE_SCROLL ||
changes & this.CHANGE_H_SCROLL
)
changes |= this.$computeLayerConfig();
// horizontal scrolling
if (changes & this.CHANGE_H_SCROLL) {
this.$updateScrollBarH();
this.content.style.marginLeft = -this.scrollLeft + "px";
this.scroller.className = this.scrollLeft <= 0 ? "ace_scroller" : "ace_scroller ace_scroll-left";
}
// full
if (changes & this.CHANGE_FULL) {
// update scrollbar first to not lose scroll position when gutter calls resize
this.$updateScrollBarV();
this.$updateScrollBarH();
this.$textLayer.update(this.layerConfig);
if (this.$showGutter)
this.$gutterLayer.update(this.layerConfig);
this.$markerBack.update(this.layerConfig);
this.$markerFront.update(this.layerConfig);
this.$cursorLayer.update(this.layerConfig);
this.$moveTextAreaToCursor();
this.$highlightGutterLine && this.$updateGutterLineHighlight();
this._signal("afterRender");
return;
}
// scrolling
if (changes & this.CHANGE_SCROLL) {
this.$updateScrollBarV();
if (changes & this.CHANGE_TEXT || changes & this.CHANGE_LINES)
this.$textLayer.update(this.layerConfig);
else
this.$textLayer.scrollLines(this.layerConfig);
if (this.$showGutter)
this.$gutterLayer.update(this.layerConfig);
this.$markerBack.update(this.layerConfig);
this.$markerFront.update(this.layerConfig);
this.$cursorLayer.update(this.layerConfig);
this.$highlightGutterLine && this.$updateGutterLineHighlight();
this.$moveTextAreaToCursor();
this._signal("afterRender");
return;
}
if (changes & this.CHANGE_TEXT) {
this.$textLayer.update(this.layerConfig);
if (this.$showGutter)
this.$gutterLayer.update(this.layerConfig);
}
else if (changes & this.CHANGE_LINES) {
if (this.$updateLines() || (changes & this.CHANGE_GUTTER) && this.$showGutter)
this.$gutterLayer.update(this.layerConfig);
}
else if (changes & this.CHANGE_TEXT || changes & this.CHANGE_GUTTER) {
if (this.$showGutter)
this.$gutterLayer.update(this.layerConfig);
}
if (changes & this.CHANGE_CURSOR) {
this.$cursorLayer.update(this.layerConfig);
this.$moveTextAreaToCursor();
this.$highlightGutterLine && this.$updateGutterLineHighlight();
}
if (changes & (this.CHANGE_MARKER | this.CHANGE_MARKER_FRONT)) {
this.$markerFront.update(this.layerConfig);
}
if (changes & (this.CHANGE_MARKER | this.CHANGE_MARKER_BACK)) {
this.$markerBack.update(this.layerConfig);
}
if (changes & this.CHANGE_SIZE || changes & this.CHANGE_LINES) {
this.$updateScrollBarV();
this.$updateScrollBarH();
}
this._signal("afterRender");
};
this.$autosize = function(height, width) {
var height = this.session.getScreenLength() * this.lineHeight;
var maxHeight = this.$maxLines * this.lineHeight;
var desiredHeight = Math.max(
(this.$minLines||1) * this.lineHeight,
Math.min(maxHeight, height)
);
var vScroll = height > maxHeight;
if (desiredHeight != this.desiredHeight ||
this.$size.height != this.desiredHeight || vScroll != this.$vScroll) {
if (vScroll != this.$vScroll) {
this.$vScroll = vScroll;
this.scrollBarV.setVisible(vScroll);
}
var w = this.container.clientWidth;
this.container.style.height = desiredHeight + "px";
this.$updateCachedSize(true, this.$gutterWidth, w, desiredHeight);
// this.$loop.changes = 0;
this.desiredHeight = desiredHeight;
}
};
this.$computeLayerConfig = function() {
if (this.$maxLines && this.lineHeight > 1)
this.$autosize();
var session = this.session;
var hideScrollbars = this.$size.height <= 2 * this.lineHeight;
var screenLines = this.session.getScreenLength()
var maxHeight = screenLines * this.lineHeight;
var offset = this.scrollTop % this.lineHeight;
var minHeight = this.$size.scrollerHeight + this.lineHeight;
var longestLine = this.$getLongestLine();
var horizScroll = !hideScrollbars && (this.$hScrollBarAlwaysVisible ||
this.$size.scrollerWidth - longestLine - 2 * this.$padding < 0);
var hScrollChanged = this.$horizScroll !== horizScroll;
if (hScrollChanged) {
this.$horizScroll = horizScroll;
this.scrollBarH.setVisible(horizScroll);
}
if (!this.$maxLines && this.$scrollPastEnd) {
if (this.scrollTop > maxHeight - this.$size.scrollerHeight)
maxHeight += Math.min(
(this.$size.scrollerHeight - this.lineHeight) * this.$scrollPastEnd,
this.scrollTop - maxHeight + this.$size.scrollerHeight
);
}
var vScroll = !hideScrollbars && (this.$vScrollBarAlwaysVisible ||
this.$size.scrollerHeight - maxHeight < 0);
var vScrollChanged = this.$vScroll !== vScroll;
if (vScrollChanged) {
this.$vScroll = vScroll;
this.scrollBarV.setVisible(vScroll);
}
this.session.setScrollTop(Math.max(-this.scrollMargin.top,
Math.min(this.scrollTop, maxHeight - this.$size.scrollerHeight + this.scrollMargin.v)));
this.session.setScrollLeft(Math.max(-this.scrollMargin.left, Math.min(this.scrollLeft,
longestLine + 2 * this.$padding - this.$size.scrollerWidth + this.scrollMargin.h)));
var lineCount = Math.ceil(minHeight / this.lineHeight) - 1;
var firstRow = Math.max(0, Math.round((this.scrollTop - offset) / this.lineHeight));
var lastRow = firstRow + lineCount;
// Map lines on the screen to lines in the document.
var firstRowScreen, firstRowHeight;
var lineHeight = this.lineHeight;
firstRow = session.screenToDocumentRow(firstRow, 0);
// Check if firstRow is inside of a foldLine. If true, then use the first
// row of the foldLine.
var foldLine = session.getFoldLine(firstRow);
if (foldLine) {
firstRow = foldLine.start.row;
}
firstRowScreen = session.documentToScreenRow(firstRow, 0);
firstRowHeight = session.getRowLength(firstRow) * lineHeight;
lastRow = Math.min(session.screenToDocumentRow(lastRow, 0), session.getLength() - 1);
minHeight = this.$size.scrollerHeight + session.getRowLength(lastRow) * lineHeight +
firstRowHeight;
offset = this.scrollTop - firstRowScreen * lineHeight;
var changes = 0;
// Horizontal scrollbar visibility may have changed, which changes
// the client height of the scroller
if (hScrollChanged || vScrollChanged) {
changes = this.$updateCachedSize(true, this.gutterWidth, this.$size.width, this.$size.height);
this._signal("scrollbarVisibilityChanged");
if (vScrollChanged)
longestLine = this.$getLongestLine();
}
this.layerConfig = {
width : longestLine,
padding : this.$padding,
firstRow : firstRow,
firstRowScreen: firstRowScreen,
lastRow : lastRow,
lineHeight : lineHeight,
characterWidth : this.characterWidth,
minHeight : minHeight,
maxHeight : maxHeight,
offset : offset,
height : this.$size.scrollerHeight
};
// For debugging.
// console.log(JSON.stringify(this.layerConfig));
this.$gutterLayer.element.style.marginTop = (-offset) + "px";
this.content.style.marginTop = (-offset) + "px";
this.content.style.width = longestLine + 2 * this.$padding + "px";
this.content.style.height = minHeight + "px";
return changes;
};
this.$updateLines = function() {
var firstRow = this.$changedLines.firstRow;
var lastRow = this.$changedLines.lastRow;
this.$changedLines = null;
var layerConfig = this.layerConfig;
if (firstRow > layerConfig.lastRow + 1) { return; }
if (lastRow < layerConfig.firstRow) { return; }
// if the last row is unknown -> redraw everything
if (lastRow === Infinity) {
if (this.$showGutter)
this.$gutterLayer.update(layerConfig);
this.$textLayer.update(layerConfig);
return;
}
// else update only the changed rows
this.$textLayer.updateLines(layerConfig, firstRow, lastRow);
return true;
};
this.$getLongestLine = function() {