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<title>README</title>
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<body class='typora-export os-windows'><div class='typora-export-content'>
<div id='write' class=''><h1 id='lua-term'><span>lua-term</span></h1><p><code>lua-term</code><span> is a Lua module for manipulating a terminal.</span></p><p><span>lua-term works on Windows when virtual terminal processing is enabled. To have this enabled automatically ensure that </span><a href='https://github.com/lunarmodules/luasystem'><span>LuaSystem</span></a><span> is installed (version 0.4.0 or newer). If found, that module will be used</span>
<span>to enable virtual terminal processing and to switch output to UTF-8.</span></p><h2 id='usage'><span>Usage</span></h2><pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="lua" style="break-inside: unset;"><div class="CodeMirror cm-s-inner cm-s-null-scroll CodeMirror-wrap" lang="lua"><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 9.52344px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><span><span></span>x</span></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-keyword">local</span> <span class="cm-variable">term</span> = <span class="cm-builtin">require</span> <span class="cm-string">'term'</span></span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-keyword">local</span> <span class="cm-variable">colors</span> = <span class="cm-variable">term.colors</span> <span class="cm-comment">-- or require 'term.colors'</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="" cm-zwsp="">
</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-builtin">print</span>(<span class="cm-variable">term.isatty</span>(<span class="cm-builtin">io.stdout</span>)) <span class="cm-comment">-- true if standard output goes to the terminal</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="" cm-zwsp="">
</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span> <span class="cm-string">'hello'</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span> .. <span class="cm-string">'hello'</span> .. <span class="cm-variable">colors.reset</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span>, <span class="cm-string">'hello'</span>, <span class="cm-variable">colors.reset</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="" cm-zwsp="">
</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-comment">-- The following functions take an optional IO handle (like io.stdout);</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-comment">-- io.stdout is the default if you don't specify one</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.clear</span>() <span class="cm-comment">-- clears the screen</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cleareol</span>() <span class="cm-comment">-- clears from the cursor to the end of the line</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-comment">--term.cursor.goto(1, 1) -- It will fail in Lua >= 5.2 because goto is a reserved word.</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor</span>[<span class="cm-string">'goto'</span>](<span class="cm-number">1</span>, <span class="cm-number">1</span>) <span class="cm-comment">-- This will work on Lua >= 5.2, please use jump instead</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.jump</span>(<span class="cm-number">1</span>, <span class="cm-number">1</span>) <span class="cm-comment">-- jump is just an alias for goto</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.jump</span>(<span class="cm-builtin">io.stdout</span>, <span class="cm-number">1</span>, <span class="cm-number">1</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.goup</span>(<span class="cm-number">1</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.godown</span>(<span class="cm-number">1</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.goright</span>(<span class="cm-number">1</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.goleft</span>(<span class="cm-number">1</span>)</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.save</span>() <span class="cm-comment">-- save position</span></span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> <span class="cm-variable">term.cursor.restore</span>() <span class="cm-comment">-- restore position</span></span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 553px;"></div><div class="CodeMirror-gutters" style="display: none; height: 553px;"></div></div></div></pre><h2 id='term-functions'><code>term</code><span> Functions</span></h2><p><span>Some functions in lua-term take an optional file handle argument; if this is</span>
<span>not provided, </span><code>io.stdout</code><span> is used.</span></p><p><code>term.clear([opt_file])</code></p><p><span>Clear the terminal's contents.</span></p><p><code>term.cleareol([opt_file])</code></p><p><span>Clear from the current cursor position to the end of the current line.</span></p><p><code>term.isatty(file)</code></p><p><span>Returns </span><code>true</code><span> if </span><code>file</code><span> is a TTY; </span><code>false</code><span> otherwise.</span></p><p><em><span>NOTE</span></em><span>: This function has been deprecated in favor of luasystem's implementation</span>
<span>(or luaposix if you don't need Windows support).</span>
<span>If you would like this functionality in the future, please use luasystem.</span></p><h2 id='termcolors-values'><code>term.colors</code><span> Values</span></h2><p><span>The following values are available in </span><code>term.colors</code><span>:</span></p><h3 id='terminal-attributes'><span>Terminal Attributes</span></h3><ul><li><p><span>reset</span></p></li><li><p><span>clear (a synonym for reset)</span></p></li><li><p><span>default (a synonym for reset)</span></p></li><li><p><span>bright</span></p></li><li><p><span>dim</span></p></li><li><p><span>underscore</span></p></li><li><p><span>blink</span></p></li><li><p><span>reverse</span></p></li><li><p><span>hidden</span></p></li></ul><h3 id='foreground-colors'><span>Foreground Colors</span></h3><ul><li><p><span>black</span></p></li><li><p><span>red</span></p></li><li><p><span>green</span></p></li><li><p><span>yellow</span></p></li><li><p><span>blue</span></p></li><li><p><span>magenta</span></p></li><li><p><span>cyan</span></p></li><li><p><span>white</span></p></li></ul><h3 id='background-colors'><span>Background Colors</span></h3><ul><li><p><span>onblack</span></p></li><li><p><span>onred</span></p></li><li><p><span>ongreen</span></p></li><li><p><span>onyellow</span></p></li><li><p><span>onblue</span></p></li><li><p><span>onmagenta</span></p></li><li><p><span>oncyan</span></p></li><li><p><span>onwhite</span></p></li></ul><p><span>Every value in </span><code>term.colors</code><span> may be used in several ways:</span></p><h3 id='as-a-function'><span>As a Function</span></h3><pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="lua"><div class="CodeMirror cm-s-inner cm-s-null-scroll CodeMirror-wrap" lang="lua"><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 9.52344px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span> <span class="cm-string">'hello'</span>)</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 23px;"></div><div class="CodeMirror-gutters" style="display: none; height: 23px;"></div></div></div></pre><h3 id='as-a-string'><span>As a String</span></h3><pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="lua"><div class="CodeMirror cm-s-inner cm-s-null-scroll CodeMirror-wrap" lang="lua"><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 9.52344px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span> .. <span class="cm-string">'hello'</span> .. <span class="cm-variable">colors.reset</span>)</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span class="cm-builtin">print</span>(<span class="cm-variable">colors.red</span>, <span class="cm-string">'hello'</span>, <span class="cm-variable">colors.reset</span>)</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 46px;"></div><div class="CodeMirror-gutters" style="display: none; height: 46px;"></div></div></div></pre><h2 id='termcursor-functions'><code>term.cursor</code><span> Functions</span></h2><p><code>term.cursor.goto([opt_file], x, y)</code></p><p><span>Place the cursor at (</span><code>x</code><span>, </span><code>y</code><span>).</span></p><p><code>term.cursor.jump([opt_file], x, y)</code></p><p><span>An alias for </span><code>term.cursor.goto</code><span>.</span></p><p><code>term.cursor.goup([opt_file], nlines)</code></p><p><span>Moves the cursor up </span><code>nlines</code><span> lines.</span></p><p><code>term.cursor.godown([opt_file], nlines)</code></p><p><span>Moves the cursor down </span><code>nlines</code><span> lines.</span></p><p><code>term.cursor.goright([opt_file], ncols)</code></p><p><span>Moves the cursor right </span><code>ncols</code><span> columns.</span></p><p><code>term.cursor.goleft([opt_file], ncols)</code></p><p><span>Moves the cursor left </span><code>ncols</code><span> columns.</span></p><p><code>term.cursor.save([opt_file])</code></p><p><span>Saves the cursor position.</span></p><p><code>term.cursor.restore([opt_file])</code></p><p><span>Restores the cursor position.</span></p><p> </p></div></div>
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