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<title>Folding</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="jEdit 5.6 User's Guide"><link rel="up" href="source-edit.html" title="Chapter 6. Editing Source Code"><link rel="prev" href="abbrevs.html" title="Abbreviations"><link rel="next" href="customizing.html" title="Chapter 7. Customizing jEdit"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Folding</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="abbrevs.html">Prev</a> </td><th width="60%" align="center">Chapter 6. Editing Source Code</th><td width="20%" align="right"> <a accesskey="n" href="customizing.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="folding"></a>Folding</h2></div></div></div><p>Program source code and other structured text files can be thought
of as containing a hierarchy of sections, which themselves might contain
sub-sections. The folding feature lets you selectively hide and show
these sections, replacing hidden ones with a single line that serves as
an <span class="quote">“<span class="quote">overview</span>”</span> of that section. Folding is disabled by
default. To enable it, you must choose one of the available folding
modes.</p><p><span class="quote">“<span class="quote">Indent</span>”</span> mode creates folds based on a line's leading
whitespace; the more leading whitespace a block of text has, the further
down it is in the hierarchy. For example:</p><pre class="screen">This is a section
This is a sub-section
This is another sub-section
This is a sub-sub-section
Another top-level section</pre><p><span class="quote">“<span class="quote">Explicit</span>”</span> mode folds away blocks of text surrounded
with <span class="quote">“<span class="quote">{{{</span>”</span> and <span class="quote">“<span class="quote">}}}</span>”</span>. For example:</p><pre class="screen">{{{ The first line of a fold.
When this fold is collapsed, only the above line will be visible.
{{{ A sub-section.
With text inside it.
}}}
{{{ Another sub-section.
}}}
}}}</pre><p>Both modes have distinct advantages and disadvantages; indent
folding requires no changes to be made to a buffer's text and does a
decent job with most program source. Explicit folding requires
<span class="quote">“<span class="quote">fold markers</span>”</span> to be inserted into the text, but is more
flexible in exactly what to fold away.</p><p>Some plugins might add additional folding modes; see <a class="xref" href="using-plugins.html" title="Chapter 9. Installing and Using Plugins">Chapter 9, <i>Installing and Using Plugins</i></a> for information about plugins.</p><p>Folding can be enabled in one of several ways:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>On a global or mode-specific basis in the
<span class="guibutton"><strong>Editing</strong></span> pane of the
<span class="guimenu"><strong>Utilities</strong></span>>
<span class="guimenuitem"><strong>Options</strong></span>
dialog box. See <a class="xref" href="global-opts.html#editing-pane" title="The Editing Pane">the section called “The Editing Pane”</a>.</p></li><li class="listitem"><p>In the current buffer for the duration of the editing
session in the
<span class="guimenu"><strong>Utilities</strong></span>><span class="guimenuitem"><strong>Buffer
Options</strong></span> dialog box. See <a class="xref" href="buffer-opts.html" title="The Buffer Options Dialog Box">the section called “The Buffer Options Dialog Box”</a>.</p></li><li class="listitem"><p>In the current buffer for future editing sessions by
placing the following in the first or last 10 lines of a buffer,
where <em class="replaceable"><code>mode</code></em> is either
<span class="quote">“<span class="quote">indent</span>”</span>, <span class="quote">“<span class="quote">explicit</span>”</span>, or the name of a
plugin folding mode:</p><pre class="screen">:folding=<em class="replaceable"><code>mode</code></em>:</pre></li></ul></div><div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Warning</h3><p>When using indent folding, portions of the buffer may become
inaccessible if you change the leading indent of the first line of a
collapsed fold. If you experience this, you can use the
<span class="guimenuitem"><strong>Expand All Folds</strong></span> command to make the text
visible again.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="d0e5059"></a>Collapsing and Expanding Folds</h3></div></div></div><p>The first line of each fold has a triangle drawn next to it in
the gutter (see <a class="xref" href="overview.html" title="Interface Overview">the section called “Interface Overview”</a> for more information
about the gutter). The triangle points toward the line when the fold
is collapsed, and downward when the fold is expanded. Clicking the
triangle collapses and expands the fold. To expand all sub-folds as
well, hold down the <code class="keycap">Shift</code> while clicking.</p><p>The first line of a collapsed fold is drawn with a background
color that depends on the fold level, and the number of lines in the
fold is shown to the right of the line's text.Folds can also be collapsed and expanded using menu item
commands and keyboard shortcuts.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Collapse
Fold</strong></span> (shortcut: <code class="keycap">A+BACK_SPACE</code>)
collapses the fold containing the caret.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Expand Fold
One Level</strong></span> (shortcut: <code class="keycap">A+ENTER</code>) expands
the fold containing the caret. Nested folds will remain collapsed,
and the caret will be positioned on the first nested fold (if
any).</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Expand Fold
Fully</strong></span> (shortcut: <code class="keycap">AS+ENTER</code>) expands
the fold containing the caret, also expanding any nested
folds.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Collapse All
Folds</strong></span> (shortcut: <code class="keycap">C+e c</code>) collapses all
folds in the buffer.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Expand All
Folds</strong></span> (shortcut: <code class="keycap">C+e x</code>) expands all
folds in the buffer.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="d0e5123"></a>Navigating Around With Folds</h3></div></div></div><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Go to Parent
Fold</strong></span> (shortcut: <code class="keycap">C+e u</code>) moves the
caret to the fold containing the one at the caret position.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Go to
Previous Fold</strong></span> (shortcut: <code class="keycap">A+UP</code>) moves
the caret to the fold immediately before the caret position.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Go to Next
Fold</strong></span> (shortcut: <code class="keycap">A+DOWN</code>) moves the
caret to the fold immediately after the caret position.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="d0e5156"></a>Miscellaneous Folding Commands</h3></div></div></div><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Add Explicit
Fold</strong></span> (shortcut: <code class="keycap">C+e a</code>) surrounds the
selection with <span class="quote">“<span class="quote">{{{</span>”</span> and <span class="quote">“<span class="quote">}}}</span>”</span>. If the
current buffer's edit mode defines comment strings (see the section called “Commenting Out Code”) the explicit fold markers will
automatically be commented out as well.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Select
Fold</strong></span> (shortcut: <code class="keycap">C+e s</code>) selects all
lines within the fold containing the caret.
<code class="keycap">Control</code>-clicking a fold expansion triangle in the
gutter has the same effect.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Expand Folds
With Level</strong></span> (shortcut: <code class="keycap">C+e ENTER
<em class="replaceable"><code>key</code></em></code>) reads the next character
entered at the keyboard, and expands folds in the buffer with a fold
level less than that specified, while collapsing all others.</p><p>Sometimes it is desirable to have files open with folds
initially collapsed. This can be configured as follows:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>On a global or mode-specific basis in the
<span class="guibutton"><strong>Editing</strong></span> pane of the
<span class="guimenu"><strong>Utilities</strong></span>>
<span class="guimenuitem"><strong>Options</strong></span> dialog box.
See <a class="xref" href="global-opts.html#editing-pane" title="The Editing Pane">the section called “The Editing Pane”</a>.</p></li><li class="listitem"><p>In the current buffer for future editing sessions by
placing the following in the first or last 10 lines of a
buffer, where <em class="replaceable"><code>level</code></em> is the
desired fold level:</p><pre class="screen">:collapseFolds=<em class="replaceable"><code>level</code></em>:</pre></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="narrowing"></a>Narrowing</h3></div></div></div><p>The narrowing feature temporarily <span class="quote">“<span class="quote">narrows</span>”</span> the
display of a buffer to a specified region. Text outside the region
is not shown, but is still present in the buffer. </p><p>Holding down <code class="keycap">Alt</code> while clicking a fold
expansion triangle in the gutter will hide all lines the buffer
except those contained in the clicked fold.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Narrow Buffer
to Fold</strong></span> (shortcut: <code class="keycap">C+e n n</code>) hides all
lines the buffer except those in the fold containing the caret. </p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Narrow Buffer
to Selection</strong></span> (shortcut: <code class="keycap">C+e n s</code>)
hides all lines the buffer except those in the selection.</p><p><span class="guisubmenu"><strong>Folding</strong></span>><span class="guimenuitem"><strong>Expand All
Folds</strong></span> (shortcut: <code class="keycap">C+e x</code>) shows lines
that were hidden as a result of narrowing.</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="abbrevs.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="source-edit.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="customizing.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Abbreviations </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 7. Customizing jEdit</td></tr></table></div></body></html>
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