74 lines
2.9 KiB
JavaScript
74 lines
2.9 KiB
JavaScript
/*
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* Fit terminal columns and rows to the dimensions of its
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* DOM element.
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*
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* Approach:
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* - Rows: Truncate the division of the terminal parent element height
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* by the terminal row height
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*
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* - Columns: Truncate the division of the terminal parent element width by
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* the terminal character width (apply display: inline at the
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* terminal row and truncate its width with the current number
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* of columns)
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*/
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(function (fit) {
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if (typeof define == 'function') {
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/*
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* Require.js is available
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*/
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define(['../../src/xterm'], fit);
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} else {
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/*
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* Plain browser environment
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*/
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fit(this.Xterm);
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}
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})(function (Xterm) {
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Xterm.prototype.proposeGeometry = function () {
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var parentElementStyle = window.getComputedStyle(this.element.parentElement),
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parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height')),
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parentElementWidth = parseInt(parentElementStyle.getPropertyValue('width')),
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elementStyle = window.getComputedStyle(this.element),
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elementPaddingVer = parseInt(elementStyle.getPropertyValue('padding-top')) + parseInt(elementStyle.getPropertyValue('padding-bottom')),
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elementPaddingHor = parseInt(elementStyle.getPropertyValue('padding-right')) + parseInt(elementStyle.getPropertyValue('padding-left')),
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availableHeight = parentElementHeight - elementPaddingVer,
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availableWidth = parentElementWidth - elementPaddingHor,
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container = this.rowContainer,
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subjectRow = this.rowContainer.firstElementChild,
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contentBuffer = subjectRow.innerHTML,
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characterHeight,
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rows,
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characterWidth,
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cols,
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geometry;
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subjectRow.style.display = 'inline';
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subjectRow.innerHTML = 'W'; // Common character for measuring width, although on monospace
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characterWidth = parseInt(subjectRow.offsetWidth);
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subjectRow.style.display = ''; // Revert style before calculating height, since they differ.
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characterHeight = parseInt(subjectRow.offsetHeight);
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subjectRow.innerHTML = contentBuffer;
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rows = parseInt(availableHeight / characterHeight);
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/*
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* The following hack takes place in order to get "fit" work properly
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* in Mozilla Firefox.
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* Most probably, because of a dimension calculation bug, Firefox
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* calculates the width to be 1px less than it is actually drawn on
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* screen.
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*/
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if (navigator.userAgent.match(/Firefox/)) {
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characterWidth++;
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}
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cols = parseInt(availableWidth / characterWidth);
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geometry = {cols: cols, rows: rows};
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return geometry;
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};
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Xterm.prototype.fit = function () {
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var geometry = this.proposeGeometry();
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this.resize(geometry.cols, geometry.rows);
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};
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}); |