1 | /*
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2 | * Fit terminal columns and rows to the dimensions of its
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3 | * DOM element.
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4 | *
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5 | * Approach:
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6 | * - Rows: Truncate the division of the terminal parent element height
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7 | * by the terminal row height
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8 | *
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9 | * - Columns: Truncate the division of the terminal parent element width by
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10 | * the terminal character width (apply display: inline at the
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11 | * terminal row and truncate its width with the current number
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12 | * of columns)
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13 | */
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14 | (function (fit) {
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15 | if (typeof exports === 'object' && typeof module === 'object') {
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16 | /*
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17 | * CommonJS environment
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18 | */
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19 | module.exports = fit(require('../../src/xterm'));
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20 | } else if (typeof define == 'function') {
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21 | /*
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22 | * Require.js is available
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23 | */
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24 | define(['../../src/xterm'], fit);
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25 | } else {
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26 | /*
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27 | * Plain browser environment
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28 | */
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29 | fit(this.Xterm);
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30 | }
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31 | })(function (Xterm) {
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32 | /**
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33 | * This module provides methods for fitting a terminal's size to a parent container.
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34 | *
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35 | * @module xterm/addons/fit/fit
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36 | */
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37 | var exports = {};
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38 |
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39 | exports.proposeGeometry = function (term) {
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40 | var parentElementStyle = window.getComputedStyle(term.element.parentElement),
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41 | parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height')),
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42 | parentElementWidth = parseInt(parentElementStyle.getPropertyValue('width')),
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43 | elementStyle = window.getComputedStyle(term.element),
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44 | elementPaddingVer = parseInt(elementStyle.getPropertyValue('padding-top')) + parseInt(elementStyle.getPropertyValue('padding-bottom')),
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45 | elementPaddingHor = parseInt(elementStyle.getPropertyValue('padding-right')) + parseInt(elementStyle.getPropertyValue('padding-left')),
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46 | availableHeight = parentElementHeight - elementPaddingVer,
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47 | availableWidth = parentElementWidth - elementPaddingHor,
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48 | container = term.rowContainer,
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49 | subjectRow = term.rowContainer.firstElementChild,
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50 | contentBuffer = subjectRow.innerHTML,
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51 | characterHeight,
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52 | rows,
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53 | characterWidth,
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54 | cols,
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55 | geometry;
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56 |
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57 | subjectRow.style.display = 'inline';
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58 | subjectRow.innerHTML = 'W'; // Common character for measuring width, although on monospace
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59 | characterWidth = subjectRow.getBoundingClientRect().width;
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60 | subjectRow.style.display = ''; // Revert style before calculating height, since they differ.
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61 | characterHeight = parseInt(subjectRow.offsetHeight);
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62 | subjectRow.innerHTML = contentBuffer;
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63 |
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64 | rows = parseInt(availableHeight / characterHeight);
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65 | cols = parseInt(availableWidth / characterWidth) - 1;
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66 |
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67 | geometry = {cols: cols, rows: rows};
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68 | return geometry;
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69 | };
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70 |
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71 | exports.fit = function (term) {
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72 | var geometry = exports.proposeGeometry(term);
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73 |
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74 | term.resize(geometry.cols, geometry.rows);
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75 | };
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76 |
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77 | Xterm.prototype.proposeGeometry = function () {
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78 | return exports.proposeGeometry(this);
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79 | };
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80 |
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81 | Xterm.prototype.fit = function () {
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82 | return exports.fit(this);
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83 | };
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84 |
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85 | return exports;
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86 | });
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