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virtual_renderer.js
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virtual_renderer.js
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"use strict";
/**
* @typedef {import("./edit_session").EditSession} EditSession
* @typedef {import("../ace-internal").Ace.Point} Point
* @typedef {import("../ace-internal").Ace.Theme} Theme
*/
var oop = require("./lib/oop");
var dom = require("./lib/dom");
var lang = require("./lib/lang");
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 HScrollBar = require("./scrollbar").HScrollBar;
var VScrollBar = require("./scrollbar").VScrollBar;
var HScrollBarCustom = require("./scrollbar_custom").HScrollBar;
var VScrollBarCustom = require("./scrollbar_custom").VScrollBar;
var RenderLoop = require("./renderloop").RenderLoop;
var FontMetrics = require("./layer/font_metrics").FontMetrics;
var EventEmitter = require("./lib/event_emitter").EventEmitter;
var editorCss = require("./css/editor-css");
var Decorator = require("./layer/decorators").Decorator;
var useragent = require("./lib/useragent");
const isTextToken = require("./layer/text_util").isTextToken;
dom.importCssString(editorCss, "ace_editor.css", false);
/**
* The class that is responsible for drawing everything you see on the screen!
* @related editor.renderer
**/
class VirtualRenderer {
/**
* Constructs a new `VirtualRenderer` within the `container` specified, applying the given `theme`.
* @param {HTMLElement | null} [container] The root element of the editor
* @param {String} [theme] The starting theme
**/
constructor(container, theme) {
var _self = this;
this.container = container || dom.createElement("div");
dom.addCssClass(this.container, "ace_editor");
if (dom.HI_DPI) dom.addCssClass(this.container, "ace_hidpi");
this.setTheme(theme);
if (config.get("useStrictCSP") == null)
config.set("useStrictCSP", false);
this.$gutter = dom.createElement("div");
this.$gutter.className = "ace_gutter";
this.container.appendChild(this.$gutter);
this.$gutter.setAttribute("aria-hidden", "true");
/**@type {HTMLElement}*/
this.scroller = dom.createElement("div");
this.scroller.className = "ace_scroller";
this.container.appendChild(this.scroller);
/**@type {HTMLElement}*/
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.$vScroll = false;
this.scrollBar =
this.scrollBarV = new VScrollBar(this.container, this);
this.scrollBarH = new HScrollBar(this.container, this);
this.scrollBarV.on("scroll", function(e) {
if (!_self.$scrollAnimation)
_self.session.setScrollTop(e.data - _self.scrollMargin.top);
});
this.scrollBarH.on("scroll", function(e) {
if (!_self.$scrollAnimation)
_self.session.setScrollLeft(e.data - _self.scrollMargin.left);
});
this.scrollTop = 0;
this.scrollLeft = 0;
this.cursorPos = {
row : 0,
column : 0
};
this.$fontMetrics = new FontMetrics(this.container);
this.$textLayer.$setFontMetrics(this.$fontMetrics);
this.$textLayer.on("changeCharacterSize", function(e) {
_self.updateCharacterSize();
_self.onResize(true, _self.gutterWidth, _self.$size.width, _self.$size.height);
_self._signal("changeCharacterSize", e);
});
this.$size = {
width: 0,
height: 0,
scrollerHeight: 0,
scrollerWidth: 0,
$dirty: true
};
this.layerConfig = {
width : 1,
padding : 0,
firstRow : 0,
firstRowScreen: 0,
lastRow : 0,
lineHeight : 0,
characterWidth : 0,
minHeight : 1,
maxHeight : 1,
offset : 0,
height : 1,
gutterOffset: 1
};
this.scrollMargin = {
left: 0,
right: 0,
top: 0,
bottom: 0,
v: 0,
h: 0
};
this.margin = {
left: 0,
right: 0,
top: 0,
bottom: 0,
v: 0,
h: 0
};
this.$keepTextAreaAtCursor = !useragent.isIOS;
this.$loop = new RenderLoop(
this.$renderChanges.bind(this),
this.container.ownerDocument.defaultView
);
this.$loop.schedule(this.CHANGE_FULL);
this.updateCharacterSize();
this.setPadding(4);
this.$addResizeObserver();
config.resetOptions(this);
config._signal("renderer", this);
}
// this.$logChanges = function(changes) {
// var a = ""
// if (changes & this.CHANGE_CURSOR) a += " cursor";
// if (changes & this.CHANGE_MARKER) a += " marker";
// if (changes & this.CHANGE_GUTTER) a += " gutter";
// if (changes & this.CHANGE_SCROLL) a += " scroll";
// if (changes & this.CHANGE_LINES) a += " lines";
// if (changes & this.CHANGE_TEXT) a += " text";
// if (changes & this.CHANGE_SIZE) a += " size";
// if (changes & this.CHANGE_MARKER_BACK) a += " marker_back";
// if (changes & this.CHANGE_MARKER_FRONT) a += " marker_front";
// if (changes & this.CHANGE_FULL) a += " full";
// if (changes & this.CHANGE_H_SCROLL) a += " h_scroll";
// console.log(a.trim())
// };
updateCharacterSize() {
// @ts-expect-error TODO: missing property initialization anywhere in codebase
if (this.$textLayer.allowBoldFonts != this.$allowBoldFonts) {
// @ts-expect-error TODO: missing property initialization anywhere in codebase
this.$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.$updatePrintMargin();
// set explicit line height to avoid normal resolving to different values based on text
dom.setStyle(this.scroller.style, "line-height", this.lineHeight + "px");
}
/**
*
* Associates the renderer with an [[EditSession `EditSession`]].
* @param {EditSession} session The session to associate with
**/
setSession(session) {
if (this.session)
this.session.doc.off("changeNewLineMode", this.onChangeNewLineMode);
this.session = session;
if (session && this.scrollMargin.top && session.getScrollTop() <= 0)
session.setScrollTop(-this.scrollMargin.top);
this.$cursorLayer.setSession(session);
this.$markerBack.setSession(session);
this.$markerFront.setSession(session);
this.$gutterLayer.setSession(session);
this.$textLayer.setSession(session);
if (!session)
return;
this.$loop.schedule(this.CHANGE_FULL);
this.session.$setFontMetrics(this.$fontMetrics);
this.scrollBarH.scrollLeft = this.scrollBarV.scrollTop = null;
this.onChangeNewLineMode = this.onChangeNewLineMode.bind(this);
this.onChangeNewLineMode();
this.session.doc.on("changeNewLineMode", this.onChangeNewLineMode);
}
/**
* Triggers a partial update of the text, from the range given by the two parameters.
* @param {Number} firstRow The first row to update
* @param {Number} lastRow The last row to update
* @param {boolean} [force]
**/
updateLines(firstRow, lastRow, force) {
if (lastRow === undefined)
lastRow = Infinity;
if (!this.$changedLines) {
this.$changedLines = {
firstRow: firstRow,
lastRow: lastRow
};
}
else {
if (this.$changedLines.firstRow > firstRow)
this.$changedLines.firstRow = firstRow;
if (this.$changedLines.lastRow < lastRow)
this.$changedLines.lastRow = lastRow;
}
// If the change happened offscreen above us then it's possible
// that a new line wrap will affect the position of the lines on our
// screen so they need redrawn.
// TODO: better solution is to not change scroll position when text is changed outside of visible area
if (this.$changedLines.lastRow < this.layerConfig.firstRow) {
if (force)
this.$changedLines.lastRow = this.layerConfig.lastRow;
else
return;
}
if (this.$changedLines.firstRow > this.layerConfig.lastRow)
return;
this.$loop.schedule(this.CHANGE_LINES);
}
/**
* @internal
*/
onChangeNewLineMode() {
this.$loop.schedule(this.CHANGE_TEXT);
this.$textLayer.$updateEolChar();
this.session.$bidiHandler.setEolChar(this.$textLayer.EOL_CHAR);
}
/**
* @internal
*/
onChangeTabSize() {
this.$loop.schedule(this.CHANGE_TEXT | this.CHANGE_MARKER);
this.$textLayer.onChangeTabSize();
}
/**
* Triggers a full update of the text, for all the rows.
**/
updateText() {
this.$loop.schedule(this.CHANGE_TEXT);
}
/**
* Triggers a full update of all the layers, for all the rows.
* @param {Boolean} [force] If `true`, forces the changes through
**/
updateFull(force) {
if (force)
this.$renderChanges(this.CHANGE_FULL, true);
else
this.$loop.schedule(this.CHANGE_FULL);
}
/**
* Updates the font size.
**/
updateFontSize() {
this.$textLayer.checkForSizeChanges();
}
$updateSizeAsync() {
if (this.$loop.pending)
this.$size.$dirty = true;
else
this.onResize();
}
/**
* [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
* @internal
**/
onResize(force, gutterWidth, 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 autosizing editors on ie
// where elements with clientHeight = 0 also have clientWidth = 0
var el = this.container;
if (!height)
height = el.clientHeight || el.scrollHeight;
if (!height && this.$maxLines && this.lineHeight > 1) {
// if we are supposed to fit to content set height at least to 1
// so that render does not exit early before calling $autosize
if (!el.style.height || el.style.height == "0px") {
el.style.height = "1px";
height = el.clientHeight || el.scrollHeight;
}
}
if (!width)
width = el.clientWidth || el.scrollWidth;
var changes = this.$updateCachedSize(force, gutterWidth, width, height);
if (this.$resizeTimer) this.$resizeTimer.cancel();
if (!this.$size.scrollerHeight || (!width && !height))
return this.resizing = 0;
if (force)
this.$gutterLayer.$padding = null;
if (force)
this.$renderChanges(changes | this.$changes, true);
else
this.$loop.schedule(changes | this.$changes);
if (this.resizing)
this.resizing = 0;
// reset cached values on scrollbars, needs to be removed when switching to non-native scrollbars
// see https://github.com/ajaxorg/ace/issues/2195
this.scrollBarH.scrollLeft = this.scrollBarV.scrollTop = null;
if (this.$customScrollbar) {
this.$updateCustomScrollbar(true);
}
}
/**
* @param [force]
* @param [gutterWidth]
* @param [width]
* @param [height]
* @return {number}
*/
$updateCachedSize(force, gutterWidth, width, height) {
height -= (this.$extraHeight || 0);
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";
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;
dom.setStyle(this.scrollBarH.element.style, "left", gutterWidth + "px");
dom.setStyle(this.scroller.style, "left", gutterWidth + this.margin.left + "px");
size.scrollerWidth = Math.max(0, width - gutterWidth - this.scrollBarV.getWidth() - this.margin.h);
dom.setStyle(this.$gutter.style, "left", this.margin.left + "px");
var right = this.scrollBarV.getWidth() + "px";
dom.setStyle(this.scrollBarH.element.style, "right", right);
dom.setStyle(this.scroller.style, "right", right);
dom.setStyle(this.scroller.style, "bottom", this.scrollBarH.getHeight());
this.scrollBarH.setWidth(size.scrollerWidth);
if (this.session && this.session.getUseWrapMode() && this.adjustWrapLimit() || force) {
changes |= this.CHANGE_FULL;
}
}
size.$dirty = !width || !height;
if (changes)
this._signal("resize", oldSize);
return changes;
}
/**
*
* @param {number} width
* @internal
*/
onGutterResize(width) {
var gutterWidth = this.$showGutter ? width : 0;
if (gutterWidth != this.gutterWidth)
this.$changes |= this.$updateCachedSize(true, gutterWidth, this.$size.width, this.$size.height);
if (this.session.getUseWrapMode() && this.adjustWrapLimit()) {
this.$loop.schedule(this.CHANGE_FULL);
} else if (this.$size.$dirty) {
this.$loop.schedule(this.CHANGE_FULL);
} else {
this.$computeLayerConfig();
}
}
/**
* Adjusts the wrap limit, which is the number of characters that can fit within the width of the edit area on screen.
**/
adjustWrapLimit() {
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
**/
setAnimatedScroll(shouldAnimate){
this.setOption("animatedScroll", shouldAnimate);
}
/**
* Returns whether an animated scroll happens or not.
* @returns {Boolean}
**/
getAnimatedScroll() {
return this.$animatedScroll;
}
/**
* Identifies whether you want to show invisible characters or not.
* @param {Boolean} showInvisibles Set to `true` to show invisibles
**/
setShowInvisibles(showInvisibles) {
this.setOption("showInvisibles", showInvisibles);
this.session.$bidiHandler.setShowInvisibles(showInvisibles);
}
/**
* Returns whether invisible characters are being shown or not.
* @returns {Boolean}
**/
getShowInvisibles() {
return this.getOption("showInvisibles");
}
/**
* @return {boolean}
*/
getDisplayIndentGuides() {
return this.getOption("displayIndentGuides");
}
/**
* @param {boolean} display
*/
setDisplayIndentGuides(display) {
this.setOption("displayIndentGuides", display);
}
/**
* @return {boolean}
*/
getHighlightIndentGuides() {
return this.getOption("highlightIndentGuides");
}
/**
* @param {boolean} highlight
*/
setHighlightIndentGuides(highlight) {
this.setOption("highlightIndentGuides", highlight);
}
/**
* Identifies whether you want to show the print margin or not.
* @param {Boolean} showPrintMargin Set to `true` to show the print margin
**/
setShowPrintMargin(showPrintMargin) {
this.setOption("showPrintMargin", showPrintMargin);
}
/**
* Returns whether the print margin is being shown or not.
* @returns {Boolean}
**/
getShowPrintMargin() {
return this.getOption("showPrintMargin");
}
/**
* Identifies whether you want to show the print margin column or not.
* @param {number} printMarginColumn Set to `true` to show the print margin column
**/
setPrintMarginColumn(printMarginColumn) {
this.setOption("printMarginColumn", printMarginColumn);
}
/**
* Returns whether the print margin column is being shown or not.
* @returns {number}
**/
getPrintMarginColumn() {
return this.getOption("printMarginColumn");
}
/**
* Returns `true` if the gutter is being shown.
* @returns {Boolean}
**/
getShowGutter(){
return this.getOption("showGutter");
}
/**
* Identifies whether you want to show the gutter or not.
* @param {Boolean} show Set to `true` to show the gutter
**/
setShowGutter(show){
return this.setOption("showGutter", show);
}
/**
* @returns {boolean}
*/
getFadeFoldWidgets(){
return this.getOption("fadeFoldWidgets");
}
/**
* @param {boolean} show
*/
setFadeFoldWidgets(show) {
this.setOption("fadeFoldWidgets", show);
}
/**
*
* @param {boolean} shouldHighlight
*/
setHighlightGutterLine(shouldHighlight) {
this.setOption("highlightGutterLine", shouldHighlight);
}
/**
* @returns {boolean}
*/
getHighlightGutterLine() {
return this.getOption("highlightGutterLine");
}
/**
*/
$updatePrintMargin() {
if (!this.$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 = Math.round(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 {HTMLElement}
**/
getContainerElement() {
return this.container;
}
/**
*
* Returns the element that the mouse events are attached to
* @returns {HTMLElement}
**/
getMouseEventTarget() {
return this.scroller;
}
/**
*
* Returns the element to which the hidden text area is added.
* @returns {HTMLElement}
**/
getTextAreaContainer() {
return this.container;
}
// move text input over the cursor
// this is required for IME
/**
*/
$moveTextAreaToCursor() {
if (this.$isMousePressed) return;
var style = this.textarea.style;
var composition = this.$composition;
if (!this.$keepTextAreaAtCursor && !composition) {
dom.translate(this.textarea, -100, 0);
return;
}
var pixelPos = this.$cursorLayer.$pixelPos;
if (!pixelPos)
return;
if (composition && composition.markerRange)
pixelPos = this.$cursorLayer.getPixelPosition(composition.markerRange.start, true);
var config = this.layerConfig;
var posTop = pixelPos.top;
var posLeft = pixelPos.left;
posTop -= config.offset;
var h = composition && composition.useTextareaForIME || useragent.isMobile ? this.lineHeight : 1;
if (posTop < 0 || posTop > config.height - h) {
dom.translate(this.textarea, 0, 0);
return;
}
var w = 1;
var maxTop = this.$size.height - h;
if (!composition) {
posTop += this.lineHeight;
}
else {
if (composition.useTextareaForIME) {
var val = this.textarea.value;
w = this.characterWidth * (this.session.$getStringScreenWidth(val)[0]);
}
else {
posTop += this.lineHeight + 2;
}
}
posLeft -= this.scrollLeft;
if (posLeft > this.$size.scrollerWidth - w)
posLeft = this.$size.scrollerWidth - w;
posLeft += this.gutterWidth + this.margin.left;
dom.setStyle(style, "height", h + "px");
dom.setStyle(style, "width", w + "px");
dom.translate(this.textarea, Math.min(posLeft, this.$size.scrollerWidth - w), Math.min(posTop, maxTop));
}
/**
* [Returns the index of the first visible row.]{: #VirtualRenderer.getFirstVisibleRow}
* @returns {Number}
**/
getFirstVisibleRow() {
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}
**/
getFirstFullyVisibleRow() {
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}
**/
getLastFullyVisibleRow() {
var config = this.layerConfig;
var lastRow = config.lastRow;
var top = this.session.documentToScreenRow(lastRow, 0) * config.lineHeight;
if (top - this.session.getScrollTop() > config.height - config.lineHeight)
return lastRow - 1;
return lastRow;
}
/**
*
* [Returns the index of the last visible row.]{: #VirtualRenderer.getLastVisibleRow}
* @returns {Number}
**/
getLastVisibleRow() {
return this.layerConfig.lastRow;
}
/**
* Sets the padding for all the layers.
* @param {Number} padding A new padding value (in pixels)
**/
setPadding(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.$updatePrintMargin();
}
/**
*
* @param {number} [top]
* @param {number} [bottom]
* @param {number} [left]
* @param {number} [right]
*/
setScrollMargin(top, bottom, left, right) {
var sm = this.scrollMargin;
sm.top = top|0;
sm.bottom = bottom|0;
sm.right = right|0;
sm.left = left|0;
sm.v = sm.top + sm.bottom;
sm.h = sm.left + sm.right;
if (sm.top && this.scrollTop <= 0 && this.session)
this.session.setScrollTop(-sm.top);
this.updateFull();
}
/**
*
* @param {number} [top]
* @param {number} [bottom]
* @param {number} [left]
* @param {number} [right]
*/
setMargin(top, bottom, left, right) {
var sm = this.margin;
sm.top = top|0;
sm.bottom = bottom|0;
sm.right = right|0;
sm.left = left|0;
sm.v = sm.top + sm.bottom;
sm.h = sm.left + sm.right;
this.$updateCachedSize(true, this.gutterWidth, this.$size.width, this.$size.height);
this.updateFull();
}
/**
* Returns whether the horizontal scrollbar is set to be always visible.
* @returns {Boolean}
**/
getHScrollBarAlwaysVisible() {
return this.$hScrollBarAlwaysVisible;
}
/**
* Identifies whether you want to show the horizontal scrollbar or not.
* @param {Boolean} alwaysVisible Set to `true` to make the horizontal scroll bar visible
**/
setHScrollBarAlwaysVisible(alwaysVisible) {
this.setOption("hScrollBarAlwaysVisible", alwaysVisible);
}
/**
* Returns whether the horizontal scrollbar is set to be always visible.
* @returns {Boolean}
**/
getVScrollBarAlwaysVisible() {
return this.$vScrollBarAlwaysVisible;
}
/**
* Identifies whether you want to show the horizontal scrollbar or not.
* @param {Boolean} alwaysVisible Set to `true` to make the horizontal scroll bar visible
**/
setVScrollBarAlwaysVisible(alwaysVisible) {
this.setOption("vScrollBarAlwaysVisible", alwaysVisible);
}
/**
*/
$updateScrollBarV() {
var scrollHeight = this.layerConfig.maxHeight;
var scrollerHeight = this.$size.scrollerHeight;
if (!this.$maxLines && this.$scrollPastEnd) {
scrollHeight -= (scrollerHeight - this.lineHeight) * this.$scrollPastEnd;
if (this.scrollTop > scrollHeight - scrollerHeight) {
scrollHeight = this.scrollTop + scrollerHeight;
this.scrollBarV.scrollTop = null;
}
}
this.scrollBarV.setScrollHeight(scrollHeight + this.scrollMargin.v);
this.scrollBarV.setScrollTop(this.scrollTop + this.scrollMargin.top);
}
$updateScrollBarH() {
this.scrollBarH.setScrollWidth(this.layerConfig.width + 2 * this.$padding + this.scrollMargin.h);
this.scrollBarH.setScrollLeft(this.scrollLeft + this.scrollMargin.left);
}
freeze() {
this.$frozen = true;
}
unfreeze() {
this.$frozen = false;
}
/**
*
* @param {number} changes
* @param {boolean} [force]
* @returns {number}
*/
$renderChanges(changes, force) {
if (this.$changes) {
changes |= this.$changes;
this.$changes = 0;
}
if ((!this.session || !this.container.offsetWidth || this.$frozen) || (!changes && !force)) {
this.$changes |= changes;
return;
}
if (this.$size.$dirty) {
this.$changes |= changes;
return this.onResize(true);
}
if (!this.lineHeight) {
this.$textLayer.checkForSizeChanges();
}
// this.$logChanges(changes);
this._signal("beforeRender", changes);
if (this.session && this.session.$bidiHandler)
this.session.$bidiHandler.updateCharacterWidths(this.$fontMetrics);
var config = this.layerConfig;
// 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.$computeLayerConfig() | this.$loop.clear();
// If a change is made offscreen and wrapMode is on, then the onscreen
// lines may have been pushed down. If so, the first screen row will not
// have changed, but the first actual row will. In that case, adjust
// scrollTop so that the cursor and onscreen content stays in the same place.
// TODO: find a better way to handle this, that works non wrapped case and doesn't compute layerConfig twice
if (config.firstRow != this.layerConfig.firstRow && config.firstRowScreen == this.layerConfig.firstRowScreen) {
var st = this.scrollTop + (config.firstRow - Math.max(this.layerConfig.firstRow, 0)) * this.lineHeight;
if (st > 0) {
// this check is needed as a workaround for the documentToScreenRow returning -1 if document.length == 0
this.scrollTop = st;
changes = changes | this.CHANGE_SCROLL;
changes |= this.$computeLayerConfig() | this.$loop.clear();
}
}
config = this.layerConfig;
// update scrollbar first to not lose scroll position when gutter calls resize
this.$updateScrollBarV();
if (changes & this.CHANGE_H_SCROLL)
this.$updateScrollBarH();
dom.translate(this.content, -this.scrollLeft, -config.offset);
var width = config.width + 2 * this.$padding + "px";
var height = config.minHeight + "px";
dom.setStyle(this.content.style, "width", width);
dom.setStyle(this.content.style, "height", height);
}
// horizontal scrolling
if (changes & this.CHANGE_H_SCROLL) {
dom.translate(this.content, -this.scrollLeft, -config.offset);
this.scroller.className = this.scrollLeft <= 0 ? "ace_scroller " : "ace_scroller ace_scroll-left ";
if (this.enableKeyboardAccessibility)
this.scroller.className += this.keyboardFocusClassName;
}
// full
if (changes & this.CHANGE_FULL) {
this.$changedLines = null;
this.$textLayer.update(config);
if (this.$showGutter)
this.$gutterLayer.update(config);
if (this.$customScrollbar) {
this.$scrollDecorator.$updateDecorators(config);
}
this.$markerBack.update(config);
this.$markerFront.update(config);
this.$cursorLayer.update(config);
this.$moveTextAreaToCursor();
this._signal("afterRender", changes);
return;
}
// scrolling
if (changes & this.CHANGE_SCROLL) {
this.$changedLines = null;
if (changes & this.CHANGE_TEXT || changes & this.CHANGE_LINES)
this.$textLayer.update(config);
else
this.$textLayer.scrollLines(config);
if (this.$showGutter) {
if (changes & this.CHANGE_GUTTER || changes & this.CHANGE_LINES)
this.$gutterLayer.update(config);
else
this.$gutterLayer.scrollLines(config);
}
if (this.$customScrollbar) {
this.$scrollDecorator.$updateDecorators(config);
}
this.$markerBack.update(config);
this.$markerFront.update(config);
this.$cursorLayer.update(config);