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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<h1>LuaScript <sub>v0.12</sub></h1>
<ul>
<li><a href="../index.html">Index</a></li>
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<h2>Examples</h2>
<ul class="nowrap">
<li><a href="../examples/bookmark.lua.html">bookmark.lua</a></li>
<li><a href="../examples/highlightoccurrences.lua.html">highlightoccurrences.lua</a></li>
<li><strong>luaautoindent.lua</strong></li>
<li><a href="../examples/luasyntaxchecker.lua.html">luasyntaxchecker.lua</a></li>
<li><a href="../examples/randomizelines.lua.html">randomizelines.lua</a></li>
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<h2>luaautoindent.lua</h2>
<pre>
<span class="comment">-- Regexs to determine when to indent or unindent
</span><span class="comment">-- From: https://github.com/sublimehq/Packages/blob/master/Lua/Indent.tmPreferences
</span><span class="keyword">local</span> decreaseIndentPattern = <span class="string">[[^\s*(elseif|else|end|\})\s*$]]</span>
<span class="keyword">local</span> increaseIndentPattern = <span class="string">[[^\s*(else|elseif|for|(local\s+)?function|if|repeat|until|while)\b((?!end).)*$|\{\s*$]]</span>
<span class="keyword">local</span> do_increase = <span class="keyword">false</span>
<span class="comment">-- Get the start and end position of a specific line number
</span><span class="keyword">local</span> <span class="keyword">function</span> getLinePositions(line_num)
<span class="keyword">local</span> start_pos = editor:PositionFromLine(line_num)
<span class="keyword">local</span> end_pos = start_pos + editor:LineLength(line_num)
<span class="keyword">return</span> start_pos, end_pos
<span class="keyword">end</span>
<span class="comment">-- Check any time a character is added
</span><span class="keyword">local</span> <span class="keyword">function</span> autoIndent_OnChar(ch)
<span class="keyword">if</span> ch == <span class="string">"\n"</span> <span class="keyword">then</span>
<span class="comment">-- Get the previous line
</span> <span class="keyword">local</span> line_num = editor:LineFromPosition(editor.CurrentPos) - <span class="number">1</span>
<span class="keyword">local</span> start_pos, end_pos = getLinePositions(line_num)
<span class="keyword">if</span> editor:findtext(increaseIndentPattern, SCFIND_REGEXP, start_pos, end_pos) <span class="keyword">then</span>
<span class="comment">-- This has to be delayed because N++'s auto-indentation hasn't triggered yet
</span> do_increase = <span class="keyword">true</span>
<span class="keyword">end</span>
<span class="keyword">else</span>
<span class="keyword">local</span> line_num = editor:LineFromPosition(editor.CurrentPos)
<span class="keyword">local</span> start_pos, end_pos = getLinePositions(line_num)
<span class="keyword">if</span> editor:findtext(decreaseIndentPattern, SCFIND_REGEXP, start_pos, end_pos) <span class="keyword">then</span>
<span class="comment">-- The pattern matched, now check the previous line's indenation
</span> <span class="keyword">if</span> line_num > <span class="number">1</span> <span class="keyword">and</span> editor.LineIndentation[line_num - <span class="number">1</span>] <= editor.LineIndentation[line_num] <span class="keyword">then</span>
editor.LineIndentation[line_num] = editor.LineIndentation[line_num] - <span class="number">4</span>
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">return</span> <span class="keyword">false</span>
<span class="keyword">end</span>
<span class="comment">-- Work around N++'s auto indentation by delaying the indentation change
</span><span class="keyword">local</span> <span class="keyword">function</span> autoIndent_OnUpdateUI(flags)
<span class="keyword">if</span> do_increase <span class="keyword">then</span>
do_increase = <span class="keyword">false</span>
<span class="comment">-- Now the the indentation can be increased since N++'s auto-indentation is done by now
</span> editor:Tab()
<span class="keyword">end</span>
<span class="keyword">return</span> <span class="keyword">false</span>
<span class="keyword">end</span>
<span class="comment">-- See if the auto indentation should be turned on or off
</span><span class="keyword">local</span> <span class="keyword">function</span> checkAutoIndent(bufferid)
<span class="comment">-- Make sure the event handlers are completely removed.
</span> <span class="comment">-- There are some cases where they can get registered more than once.
</span> <span class="keyword">while</span> npp.RemoveEventHandler(<span class="string">"OnChar"</span>, autoIndent_OnChar) <span class="keyword">do</span> <span class="keyword">end</span>
<span class="keyword">while</span> npp.RemoveEventHandler(<span class="string">"OnUpdateUI"</span>, autoIndent_OnUpdateUI) <span class="keyword">do</span> <span class="keyword">end</span>
<span class="keyword">if</span> npp.BufferLangType[bufferid] == L_LUA <span class="keyword">then</span>
do_increase = <span class="keyword">false</span>
<span class="comment">-- Register the event handlers
</span> npp.AddEventHandler(<span class="string">"OnChar"</span>, autoIndent_OnChar)
npp.AddEventHandler(<span class="string">"OnUpdateUI"</span>, autoIndent_OnUpdateUI)
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="comment">-- Only turn on the auto indentation when it is actually a lua file
</span><span class="comment">-- Check it when the file is switched to and if the language changes
</span>
npp.AddEventHandler(<span class="string">"OnSwitchFile"</span>, <span class="keyword">function</span>(filename, bufferid)
checkAutoIndent(bufferid)
<span class="keyword">return</span> <span class="keyword">false</span>
<span class="keyword">end</span>)
npp.AddEventHandler(<span class="string">"OnLangChange"</span>, <span class="keyword">function</span>()
checkAutoIndent(npp.CurrentBufferID)
<span class="keyword">return</span> <span class="keyword">false</span>
<span class="keyword">end</span>)</pre>
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