68 lines
2.4 KiB
TypeScript
68 lines
2.4 KiB
TypeScript
/**
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* Copyright (c) 2014 The xterm.js authors. All rights reserved.
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* @license MIT
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*
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* Fit terminal columns and rows to the dimensions of its DOM element.
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*
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* ## Approach
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*
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* Rows: Truncate the division of the terminal parent element height by the
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* terminal row height.
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* Columns: Truncate the division of the terminal parent element width by the
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* terminal character width (apply display: inline at the terminal
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* row and truncate its width with the current number of columns).
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*/
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import { Terminal } from 'xterm';
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export interface IGeometry {
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rows: number;
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cols: number;
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}
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export function proposeGeometry(term: Terminal): IGeometry {
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if (!term.element.parentElement) {
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return null;
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}
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const parentElementStyle = window.getComputedStyle(term.element.parentElement);
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const parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height'));
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const parentElementWidth = Math.max(0, parseInt(parentElementStyle.getPropertyValue('width')));
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const elementStyle = window.getComputedStyle(term.element);
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const elementPadding = {
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top: parseInt(elementStyle.getPropertyValue('padding-top')),
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bottom: parseInt(elementStyle.getPropertyValue('padding-bottom')),
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right: parseInt(elementStyle.getPropertyValue('padding-right')),
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left: parseInt(elementStyle.getPropertyValue('padding-left'))
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};
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const elementPaddingVer = elementPadding.top + elementPadding.bottom;
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const elementPaddingHor = elementPadding.right + elementPadding.left;
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const availableHeight = parentElementHeight - elementPaddingVer;
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const availableWidth = parentElementWidth - elementPaddingHor - (<any>term).viewport.scrollBarWidth;
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const geometry = {
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cols: Math.floor(availableWidth / (<any>term).renderer.dimensions.actualCellWidth),
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rows: Math.floor(availableHeight / (<any>term).renderer.dimensions.actualCellHeight)
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};
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return geometry;
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}
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export function fit(term: Terminal): void {
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const geometry = proposeGeometry(term);
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if (geometry) {
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// Force a full render
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if (term.rows !== geometry.rows || term.cols !== geometry.cols) {
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(<any>term).renderer.clear();
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term.resize(geometry.cols, geometry.rows);
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}
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}
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}
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export function apply(terminalConstructor: typeof Terminal): void {
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(<any>terminalConstructor.prototype).proposeGeometry = function (): IGeometry {
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return proposeGeometry(this);
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};
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(<any>terminalConstructor.prototype).fit = function (): void {
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fit(this);
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};
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}
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