monaco-editor
Version:
A browser based code editor
240 lines (239 loc) • 14.1 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
import * as strings from '../../../base/common/strings.js';
import { CharacterClassifier } from '../core/characterClassifier.js';
import { toUint32Array } from '../core/uint.js';
import { PrefixSumComputer } from './prefixSumComputer.js';
import { OutputPosition } from './splitLinesCollection.js';
var WrappingCharacterClassifier = /** @class */ (function (_super) {
__extends(WrappingCharacterClassifier, _super);
function WrappingCharacterClassifier(BREAK_BEFORE, BREAK_AFTER, BREAK_OBTRUSIVE) {
var _this = _super.call(this, 0 /* NONE */) || this;
for (var i = 0; i < BREAK_BEFORE.length; i++) {
_this.set(BREAK_BEFORE.charCodeAt(i), 1 /* BREAK_BEFORE */);
}
for (var i = 0; i < BREAK_AFTER.length; i++) {
_this.set(BREAK_AFTER.charCodeAt(i), 2 /* BREAK_AFTER */);
}
for (var i = 0; i < BREAK_OBTRUSIVE.length; i++) {
_this.set(BREAK_OBTRUSIVE.charCodeAt(i), 3 /* BREAK_OBTRUSIVE */);
}
return _this;
}
WrappingCharacterClassifier.prototype.get = function (charCode) {
// Initialize CharacterClass.BREAK_IDEOGRAPHIC for these Unicode ranges:
// 1. CJK Unified Ideographs (0x4E00 -- 0x9FFF)
// 2. CJK Unified Ideographs Extension A (0x3400 -- 0x4DBF)
// 3. Hiragana and Katakana (0x3040 -- 0x30FF)
if ((charCode >= 0x3040 && charCode <= 0x30FF)
|| (charCode >= 0x3400 && charCode <= 0x4DBF)
|| (charCode >= 0x4E00 && charCode <= 0x9FFF)) {
return 4 /* BREAK_IDEOGRAPHIC */;
}
return _super.prototype.get.call(this, charCode);
};
return WrappingCharacterClassifier;
}(CharacterClassifier));
var CharacterHardWrappingLineMapperFactory = /** @class */ (function () {
function CharacterHardWrappingLineMapperFactory(breakBeforeChars, breakAfterChars, breakObtrusiveChars) {
this.classifier = new WrappingCharacterClassifier(breakBeforeChars, breakAfterChars, breakObtrusiveChars);
}
// TODO@Alex -> duplicated in lineCommentCommand
CharacterHardWrappingLineMapperFactory.nextVisibleColumn = function (currentVisibleColumn, tabSize, isTab, columnSize) {
currentVisibleColumn = +currentVisibleColumn; //@perf
tabSize = +tabSize; //@perf
columnSize = +columnSize; //@perf
if (isTab) {
return currentVisibleColumn + (tabSize - (currentVisibleColumn % tabSize));
}
return currentVisibleColumn + columnSize;
};
CharacterHardWrappingLineMapperFactory.prototype.createLineMapping = function (lineText, tabSize, breakingColumn, columnsForFullWidthChar, hardWrappingIndent) {
if (breakingColumn === -1) {
return null;
}
tabSize = +tabSize; //@perf
breakingColumn = +breakingColumn; //@perf
columnsForFullWidthChar = +columnsForFullWidthChar; //@perf
hardWrappingIndent = +hardWrappingIndent; //@perf
var wrappedTextIndentVisibleColumn = 0;
var wrappedTextIndent = '';
var firstNonWhitespaceIndex = -1;
if (hardWrappingIndent !== 0 /* None */) {
firstNonWhitespaceIndex = strings.firstNonWhitespaceIndex(lineText);
if (firstNonWhitespaceIndex !== -1) {
// Track existing indent
wrappedTextIndent = lineText.substring(0, firstNonWhitespaceIndex);
for (var i = 0; i < firstNonWhitespaceIndex; i++) {
wrappedTextIndentVisibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(wrappedTextIndentVisibleColumn, tabSize, lineText.charCodeAt(i) === 9 /* Tab */, 1);
}
// Increase indent of continuation lines, if desired
var numberOfAdditionalTabs = 0;
if (hardWrappingIndent === 2 /* Indent */) {
numberOfAdditionalTabs = 1;
}
else if (hardWrappingIndent === 3 /* DeepIndent */) {
numberOfAdditionalTabs = 2;
}
for (var i = 0; i < numberOfAdditionalTabs; i++) {
wrappedTextIndent += '\t';
wrappedTextIndentVisibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(wrappedTextIndentVisibleColumn, tabSize, true, 1);
}
// Force sticking to beginning of line if no character would fit except for the indentation
if (wrappedTextIndentVisibleColumn + columnsForFullWidthChar > breakingColumn) {
wrappedTextIndent = '';
wrappedTextIndentVisibleColumn = 0;
}
}
}
var classifier = this.classifier;
var lastBreakingOffset = 0; // Last 0-based offset in the lineText at which a break happened
var breakingLengths = []; // The length of each broken-up line text
var breakingLengthsIndex = 0; // The count of breaks already done
var visibleColumn = 0; // Visible column since the beginning of the current line
var niceBreakOffset = -1; // Last index of a character that indicates a break should happen before it (more desirable)
var niceBreakVisibleColumn = 0; // visible column if a break were to be later introduced before `niceBreakOffset`
var obtrusiveBreakOffset = -1; // Last index of a character that indicates a break should happen before it (less desirable)
var obtrusiveBreakVisibleColumn = 0; // visible column if a break were to be later introduced before `obtrusiveBreakOffset`
var len = lineText.length;
for (var i = 0; i < len; i++) {
// At this point, there is a certainty that the character before `i` fits on the current line,
// but the character at `i` might not fit
var charCode = lineText.charCodeAt(i);
var charCodeIsTab = (charCode === 9 /* Tab */);
var charCodeClass = classifier.get(charCode);
if (charCodeClass === 1 /* BREAK_BEFORE */) {
// This is a character that indicates that a break should happen before it
// Since we are certain the character before `i` fits, there's no extra checking needed,
// just mark it as a nice breaking opportunity
niceBreakOffset = i;
niceBreakVisibleColumn = wrappedTextIndentVisibleColumn;
}
// CJK breaking : before break
if (charCodeClass === 4 /* BREAK_IDEOGRAPHIC */ && i > 0) {
var prevCode = lineText.charCodeAt(i - 1);
var prevClass = classifier.get(prevCode);
if (prevClass !== 1 /* BREAK_BEFORE */) { // Kinsoku Shori: Don't break after a leading character, like an open bracket
niceBreakOffset = i;
niceBreakVisibleColumn = wrappedTextIndentVisibleColumn;
}
}
var charColumnSize = 1;
if (strings.isFullWidthCharacter(charCode)) {
charColumnSize = columnsForFullWidthChar;
}
// Advance visibleColumn with character at `i`
visibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(visibleColumn, tabSize, charCodeIsTab, charColumnSize);
if (visibleColumn > breakingColumn && i !== 0) {
// We need to break at least before character at `i`:
// - break before niceBreakLastOffset if it exists (and re-establish a correct visibleColumn by using niceBreakVisibleColumn + charAt(i))
// - otherwise, break before obtrusiveBreakLastOffset if it exists (and re-establish a correct visibleColumn by using obtrusiveBreakVisibleColumn + charAt(i))
// - otherwise, break before i (and re-establish a correct visibleColumn by charAt(i))
var breakBeforeOffset = void 0;
var restoreVisibleColumnFrom = void 0;
if (niceBreakOffset !== -1 && niceBreakVisibleColumn <= breakingColumn) {
// We will break before `niceBreakLastOffset`
breakBeforeOffset = niceBreakOffset;
restoreVisibleColumnFrom = niceBreakVisibleColumn;
}
else if (obtrusiveBreakOffset !== -1 && obtrusiveBreakVisibleColumn <= breakingColumn) {
// We will break before `obtrusiveBreakLastOffset`
breakBeforeOffset = obtrusiveBreakOffset;
restoreVisibleColumnFrom = obtrusiveBreakVisibleColumn;
}
else {
// We will break before `i`
breakBeforeOffset = i;
restoreVisibleColumnFrom = wrappedTextIndentVisibleColumn;
}
// Break before character at `breakBeforeOffset`
breakingLengths[breakingLengthsIndex++] = breakBeforeOffset - lastBreakingOffset;
lastBreakingOffset = breakBeforeOffset;
// Re-establish visibleColumn by taking character at `i` into account
visibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(restoreVisibleColumnFrom, tabSize, charCodeIsTab, charColumnSize);
// Reset markers
niceBreakOffset = -1;
niceBreakVisibleColumn = 0;
obtrusiveBreakOffset = -1;
obtrusiveBreakVisibleColumn = 0;
}
// At this point, there is a certainty that the character at `i` fits on the current line
if (niceBreakOffset !== -1) {
// Advance niceBreakVisibleColumn
niceBreakVisibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(niceBreakVisibleColumn, tabSize, charCodeIsTab, charColumnSize);
}
if (obtrusiveBreakOffset !== -1) {
// Advance obtrusiveBreakVisibleColumn
obtrusiveBreakVisibleColumn = CharacterHardWrappingLineMapperFactory.nextVisibleColumn(obtrusiveBreakVisibleColumn, tabSize, charCodeIsTab, charColumnSize);
}
if (charCodeClass === 2 /* BREAK_AFTER */ && (hardWrappingIndent === 0 /* None */ || i >= firstNonWhitespaceIndex)) {
// This is a character that indicates that a break should happen after it
niceBreakOffset = i + 1;
niceBreakVisibleColumn = wrappedTextIndentVisibleColumn;
}
// CJK breaking : after break
if (charCodeClass === 4 /* BREAK_IDEOGRAPHIC */ && i < len - 1) {
var nextCode = lineText.charCodeAt(i + 1);
var nextClass = classifier.get(nextCode);
if (nextClass !== 2 /* BREAK_AFTER */) { // Kinsoku Shori: Don't break before a trailing character, like a period
niceBreakOffset = i + 1;
niceBreakVisibleColumn = wrappedTextIndentVisibleColumn;
}
}
if (charCodeClass === 3 /* BREAK_OBTRUSIVE */) {
// This is an obtrusive character that indicates that a break should happen after it
obtrusiveBreakOffset = i + 1;
obtrusiveBreakVisibleColumn = wrappedTextIndentVisibleColumn;
}
}
if (breakingLengthsIndex === 0) {
return null;
}
// Add last segment
breakingLengths[breakingLengthsIndex++] = len - lastBreakingOffset;
return new CharacterHardWrappingLineMapping(new PrefixSumComputer(toUint32Array(breakingLengths)), wrappedTextIndent);
};
return CharacterHardWrappingLineMapperFactory;
}());
export { CharacterHardWrappingLineMapperFactory };
var CharacterHardWrappingLineMapping = /** @class */ (function () {
function CharacterHardWrappingLineMapping(prefixSums, wrappedLinesIndent) {
this._prefixSums = prefixSums;
this._wrappedLinesIndent = wrappedLinesIndent;
}
CharacterHardWrappingLineMapping.prototype.getOutputLineCount = function () {
return this._prefixSums.getCount();
};
CharacterHardWrappingLineMapping.prototype.getWrappedLinesIndent = function () {
return this._wrappedLinesIndent;
};
CharacterHardWrappingLineMapping.prototype.getInputOffsetOfOutputPosition = function (outputLineIndex, outputOffset) {
if (outputLineIndex === 0) {
return outputOffset;
}
else {
return this._prefixSums.getAccumulatedValue(outputLineIndex - 1) + outputOffset;
}
};
CharacterHardWrappingLineMapping.prototype.getOutputPositionOfInputOffset = function (inputOffset) {
var r = this._prefixSums.getIndexOf(inputOffset);
return new OutputPosition(r.index, r.remainder);
};
return CharacterHardWrappingLineMapping;
}());
export { CharacterHardWrappingLineMapping };