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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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