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Consolidate translateBufferLineToString functions

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This commit is contained in:
Daniel Imms
2017-06-13 19:55:29 -07:00
parent f88dcd160c
commit b957130787
3 changed files with 66 additions and 98 deletions
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src/SelectionManager.ts
+5 -53
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@@ -8,6 +8,7 @@ import { EventEmitter } from './EventEmitter';
import * as Mouse from './utils/Mouse';
import { ITerminal } from './Interfaces';
import { SelectionModel } from './SelectionModel';
import { translateBufferLineToString } from './utils/BufferLine';
/**
* The number of pixels the mouse needs to be above or below the viewport in
@@ -179,16 +180,16 @@ export class SelectionManager extends EventEmitter {
// Get first row
const startRowEndCol = start[1] === end[1] ? end[0] : null;
let result: string[] = [];
result.push(this._translateBufferLineToString(this._buffer.get(start[1]), true, start[0], startRowEndCol));
result.push(translateBufferLineToString(this._buffer.get(start[1]), true, start[0], startRowEndCol));
// Get middle rows
for (let i = start[1] + 1; i <= end[1] - 1; i++) {
result.push(this._translateBufferLineToString(this._buffer.get(i), true));
result.push(translateBufferLineToString(this._buffer.get(i), true));
}
// Get final row
if (start[1] !== end[1]) {
result.push(this._translateBufferLineToString(this._buffer.get(end[1]), true, 0, end[0]));
result.push(translateBufferLineToString(this._buffer.get(end[1]), true, 0, end[0]));
}
// Format string by replacing non-breaking space chars with regular spaces
@@ -209,55 +210,6 @@ export class SelectionManager extends EventEmitter {
this.refresh();
}
/**
* Translates a buffer line to a string, with optional start and end columns.
* Wide characters will count as two columns in the resulting string. This
* function is useful for getting the actual text underneath the raw selection
* position.
* @param line The line being translated.
* @param trimRight Whether to trim whitespace to the right.
* @param startCol The column to start at.
* @param endCol The column to end at.
*/
private _translateBufferLineToString(line: any, trimRight: boolean, startCol: number = 0, endCol: number = null): string {
// TODO: This function should live in a buffer or buffer line class
// Get full line
let lineString = '';
let widthAdjustedStartCol = startCol;
let widthAdjustedEndCol = endCol;
for (let i = 0; i < line.length; i++) {
const char = line[i];
lineString += char[LINE_DATA_CHAR_INDEX];
// Adjust start and end cols for wide characters if they affect their
// column indexes
if (char[LINE_DATA_WIDTH_INDEX] === 0) {
if (startCol >= i) {
widthAdjustedStartCol--;
}
if (endCol >= i) {
widthAdjustedEndCol--;
}
}
}
// Calculate the final end col by trimming whitespace on the right of the
// line if needed.
let finalEndCol = widthAdjustedEndCol || line.length;
if (trimRight) {
const rightWhitespaceIndex = lineString.search(/\s+$/);
if (rightWhitespaceIndex !== -1) {
finalEndCol = Math.min(finalEndCol, rightWhitespaceIndex);
}
// Return the empty string if only trimmed whitespace is selected
if (finalEndCol <= widthAdjustedStartCol) {
return '';
}
}
return lineString.substring(widthAdjustedStartCol, finalEndCol);
}
/**
* Queues a refresh, redrawing the selection on the next opportunity.
*/
@@ -570,7 +522,7 @@ export class SelectionManager extends EventEmitter {
*/
protected _selectWordAt(coords: [number, number]): void {
const bufferLine = this._buffer.get(coords[1]);
const line = this._translateBufferLineToString(bufferLine, false);
const line = translateBufferLineToString(bufferLine, false);
// Get actual index, taking into consideration wide characters
let endIndex = this._convertViewportColToCharacterIndex(bufferLine, coords);