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202 lines (182 loc) · 5.88 KB
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { IPosition, Position } from 'vs/editor/common/core/position';
import { Range } from 'vs/editor/common/core/range';
/**
* A selection in the editor.
* The selection is a range that has an orientation.
*/
export interface ISelection {
/**
* The line number on which the selection has started.
*/
readonly selectionStartLineNumber: number;
/**
* The column on `selectionStartLineNumber` where the selection has started.
*/
readonly selectionStartColumn: number;
/**
* The line number on which the selection has ended.
*/
readonly positionLineNumber: number;
/**
* The column on `positionLineNumber` where the selection has ended.
*/
readonly positionColumn: number;
}
/**
* The direction of a selection.
*/
export const enum SelectionDirection {
/**
* The selection starts above where it ends.
*/
LTR,
/**
* The selection starts below where it ends.
*/
RTL
}
/**
* A selection in the editor.
* The selection is a range that has an orientation.
*/
export class Selection extends Range {
/**
* The line number on which the selection has started.
*/
public readonly selectionStartLineNumber: number;
/**
* The column on `selectionStartLineNumber` where the selection has started.
*/
public readonly selectionStartColumn: number;
/**
* The line number on which the selection has ended.
*/
public readonly positionLineNumber: number;
/**
* The column on `positionLineNumber` where the selection has ended.
*/
public readonly positionColumn: number;
constructor(selectionStartLineNumber: number, selectionStartColumn: number, positionLineNumber: number, positionColumn: number) {
super(selectionStartLineNumber, selectionStartColumn, positionLineNumber, positionColumn);
this.selectionStartLineNumber = selectionStartLineNumber;
this.selectionStartColumn = selectionStartColumn;
this.positionLineNumber = positionLineNumber;
this.positionColumn = positionColumn;
}
/**
* Transform to a human-readable representation.
*/
public toString(): string {
return '[' + this.selectionStartLineNumber + ',' + this.selectionStartColumn + ' -> ' + this.positionLineNumber + ',' + this.positionColumn + ']';
}
/**
* Test if equals other selection.
*/
public equalsSelection(other: ISelection): boolean {
return (
Selection.selectionsEqual(this, other)
);
}
/**
* Test if the two selections are equal.
*/
public static selectionsEqual(a: ISelection, b: ISelection): boolean {
return (
a.selectionStartLineNumber === b.selectionStartLineNumber &&
a.selectionStartColumn === b.selectionStartColumn &&
a.positionLineNumber === b.positionLineNumber &&
a.positionColumn === b.positionColumn
);
}
/**
* Get directions (LTR or RTL).
*/
public getDirection(): SelectionDirection {
if (this.selectionStartLineNumber === this.startLineNumber && this.selectionStartColumn === this.startColumn) {
return SelectionDirection.LTR;
}
return SelectionDirection.RTL;
}
/**
* Create a new selection with a different `positionLineNumber` and `positionColumn`.
*/
public setEndPosition(endLineNumber: number, endColumn: number): Selection {
if (this.getDirection() === SelectionDirection.LTR) {
return new Selection(this.startLineNumber, this.startColumn, endLineNumber, endColumn);
}
return new Selection(endLineNumber, endColumn, this.startLineNumber, this.startColumn);
}
/**
* Get the position at `positionLineNumber` and `positionColumn`.
*/
public getPosition(): Position {
return new Position(this.positionLineNumber, this.positionColumn);
}
/**
* Create a new selection with a different `selectionStartLineNumber` and `selectionStartColumn`.
*/
public setStartPosition(startLineNumber: number, startColumn: number): Selection {
if (this.getDirection() === SelectionDirection.LTR) {
return new Selection(startLineNumber, startColumn, this.endLineNumber, this.endColumn);
}
return new Selection(this.endLineNumber, this.endColumn, startLineNumber, startColumn);
}
// ----
/**
* Create a `Selection` from one or two positions
*/
public static fromPositions(start: IPosition, end: IPosition = start): Selection {
return new Selection(start.lineNumber, start.column, end.lineNumber, end.column);
}
/**
* Create a `Selection` from an `ISelection`.
*/
public static liftSelection(sel: ISelection): Selection {
return new Selection(sel.selectionStartLineNumber, sel.selectionStartColumn, sel.positionLineNumber, sel.positionColumn);
}
/**
* `a` equals `b`.
*/
public static selectionsArrEqual(a: ISelection[], b: ISelection[]): boolean {
if (a && !b || !a && b) {
return false;
}
if (!a && !b) {
return true;
}
if (a.length !== b.length) {
return false;
}
for (let i = 0, len = a.length; i < len; i++) {
if (!this.selectionsEqual(a[i], b[i])) {
return false;
}
}
return true;
}
/**
* Test if `obj` is an `ISelection`.
*/
public static isISelection(obj: any): obj is ISelection {
return (
obj
&& (typeof obj.selectionStartLineNumber === 'number')
&& (typeof obj.selectionStartColumn === 'number')
&& (typeof obj.positionLineNumber === 'number')
&& (typeof obj.positionColumn === 'number')
);
}
/**
* Create with a direction.
*/
public static createWithDirection(startLineNumber: number, startColumn: number, endLineNumber: number, endColumn: number, direction: SelectionDirection): Selection {
if (direction === SelectionDirection.LTR) {
return new Selection(startLineNumber, startColumn, endLineNumber, endColumn);
}
return new Selection(endLineNumber, endColumn, startLineNumber, startColumn);
}
}