Documentation/Source/eric5.UI.DiffDialog.html

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<h1>eric5.UI.DiffDialog</h1>
<p>
Module implementing a dialog to compare two files.
</p>
<h3>Global Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Classes</h3>
<table>
<tr>
<td><a href="#DiffDialog">DiffDialog</a></td>
<td>Class implementing a dialog to compare two files.</td>
</tr><tr>
<td><a href="#DiffWindow">DiffWindow</a></td>
<td>Main window class for the standalone dialog.</td>
</tr>
</table>
<h3>Functions</h3>
<table>
<tr>
<td><a href="#context_diff">context_diff</a></td>
<td>Compare two sequences of lines; generate the delta as a context diff.</td>
</tr><tr>
<td><a href="#unified_diff">unified_diff</a></td>
<td>Compare two sequences of lines; generate the delta as a unified diff.</td>
</tr>
</table>
<hr /><hr />
<a NAME="DiffDialog" ID="DiffDialog"></a>
<h2>DiffDialog</h2>
<p>
    Class implementing a dialog to compare two files.
</p>
<h3>Derived from</h3>
QWidget, Ui_DiffDialog
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#DiffDialog.__init__">DiffDialog</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#DiffDialog.__appendText">__appendText</a></td>
<td>Private method to append text to the end of the contents pane.</td>
</tr><tr>
<td><a href="#DiffDialog.__fileChanged">__fileChanged</a></td>
<td>Private slot to enable/disable the Compare button.</td>
</tr><tr>
<td><a href="#DiffDialog.__generateContextDiff">__generateContextDiff</a></td>
<td>Private slot to generate a context diff output.</td>
</tr><tr>
<td><a href="#DiffDialog.__generateUnifiedDiff">__generateUnifiedDiff</a></td>
<td>Private slot to generate a unified diff output.</td>
</tr><tr>
<td><a href="#DiffDialog.__selectFile">__selectFile</a></td>
<td>Private slot to display a file selection dialog.</td>
</tr><tr>
<td><a href="#DiffDialog.on_buttonBox_clicked">on_buttonBox_clicked</a></td>
<td>Private slot called by a button of the button box clicked.</td>
</tr><tr>
<td><a href="#DiffDialog.on_diffButton_clicked">on_diffButton_clicked</a></td>
<td>Private slot to handle the Compare button press.</td>
</tr><tr>
<td><a href="#DiffDialog.on_file1Button_clicked">on_file1Button_clicked</a></td>
<td>Private slot to handle the file 1 file selection button press.</td>
</tr><tr>
<td><a href="#DiffDialog.on_file2Button_clicked">on_file2Button_clicked</a></td>
<td>Private slot to handle the file 2 file selection button press.</td>
</tr><tr>
<td><a href="#DiffDialog.on_saveButton_clicked">on_saveButton_clicked</a></td>
<td>Private slot to handle the Save button press.</td>
</tr><tr>
<td><a href="#DiffDialog.show">show</a></td>
<td>Public slot to show the dialog.</td>
</tr>
</table>
<a NAME="DiffDialog.__init__" ID="DiffDialog.__init__"></a>
<h4>DiffDialog (Constructor)</h4>
<b>DiffDialog</b>(<i>parent = None</i>)
<p>
        Constructor
</p><a NAME="DiffDialog.__appendText" ID="DiffDialog.__appendText"></a>
<h4>DiffDialog.__appendText</h4>
<b>__appendText</b>(<i>txt, format</i>)
<p>
        Private method to append text to the end of the contents pane.
</p><dl>
<dt><i>txt</i></dt>
<dd>
text to insert (string)
</dd><dt><i>format</i></dt>
<dd>
text format to be used (QTextCharFormat)
</dd>
</dl><a NAME="DiffDialog.__fileChanged" ID="DiffDialog.__fileChanged"></a>
<h4>DiffDialog.__fileChanged</h4>
<b>__fileChanged</b>(<i></i>)
<p>
        Private slot to enable/disable the Compare button.
</p><a NAME="DiffDialog.__generateContextDiff" ID="DiffDialog.__generateContextDiff"></a>
<h4>DiffDialog.__generateContextDiff</h4>
<b>__generateContextDiff</b>(<i>a, b, fromfile, tofile, fromfiledate, tofiledate</i>)
<p>
        Private slot to generate a context diff output.
</p><dl>
<dt><i>a</i></dt>
<dd>
first sequence of lines (list of strings)
</dd><dt><i>b</i></dt>
<dd>
second sequence of lines (list of strings)
</dd><dt><i>fromfile</i></dt>
<dd>
filename of the first file (string)
</dd><dt><i>tofile</i></dt>
<dd>
filename of the second file (string)
</dd><dt><i>fromfiledate</i></dt>
<dd>
modification time of the first file (string)
</dd><dt><i>tofiledate</i></dt>
<dd>
modification time of the second file (string)
</dd>
</dl><a NAME="DiffDialog.__generateUnifiedDiff" ID="DiffDialog.__generateUnifiedDiff"></a>
<h4>DiffDialog.__generateUnifiedDiff</h4>
<b>__generateUnifiedDiff</b>(<i>a, b, fromfile, tofile, fromfiledate, tofiledate</i>)
<p>
        Private slot to generate a unified diff output.
</p><dl>
<dt><i>a</i></dt>
<dd>
first sequence of lines (list of strings)
</dd><dt><i>b</i></dt>
<dd>
second sequence of lines (list of strings)
</dd><dt><i>fromfile</i></dt>
<dd>
filename of the first file (string)
</dd><dt><i>tofile</i></dt>
<dd>
filename of the second file (string)
</dd><dt><i>fromfiledate</i></dt>
<dd>
modification time of the first file (string)
</dd><dt><i>tofiledate</i></dt>
<dd>
modification time of the second file (string)
</dd>
</dl><a NAME="DiffDialog.__selectFile" ID="DiffDialog.__selectFile"></a>
<h4>DiffDialog.__selectFile</h4>
<b>__selectFile</b>(<i>lineEdit</i>)
<p>
        Private slot to display a file selection dialog.
</p><dl>
<dt><i>lineEdit</i></dt>
<dd>
field for the display of the selected filename
                (QLineEdit)
</dd>
</dl><a NAME="DiffDialog.on_buttonBox_clicked" ID="DiffDialog.on_buttonBox_clicked"></a>
<h4>DiffDialog.on_buttonBox_clicked</h4>
<b>on_buttonBox_clicked</b>(<i>button</i>)
<p>
        Private slot called by a button of the button box clicked.
</p><dl>
<dt><i>button</i></dt>
<dd>
button that was clicked (QAbstractButton)
</dd>
</dl><a NAME="DiffDialog.on_diffButton_clicked" ID="DiffDialog.on_diffButton_clicked"></a>
<h4>DiffDialog.on_diffButton_clicked</h4>
<b>on_diffButton_clicked</b>(<i></i>)
<p>
        Private slot to handle the Compare button press.
</p><a NAME="DiffDialog.on_file1Button_clicked" ID="DiffDialog.on_file1Button_clicked"></a>
<h4>DiffDialog.on_file1Button_clicked</h4>
<b>on_file1Button_clicked</b>(<i></i>)
<p>
        Private slot to handle the file 1 file selection button press.
</p><a NAME="DiffDialog.on_file2Button_clicked" ID="DiffDialog.on_file2Button_clicked"></a>
<h4>DiffDialog.on_file2Button_clicked</h4>
<b>on_file2Button_clicked</b>(<i></i>)
<p>
        Private slot to handle the file 2 file selection button press.
</p><a NAME="DiffDialog.on_saveButton_clicked" ID="DiffDialog.on_saveButton_clicked"></a>
<h4>DiffDialog.on_saveButton_clicked</h4>
<b>on_saveButton_clicked</b>(<i></i>)
<p>
        Private slot to handle the Save button press.
</p><p>
        It saves the diff shown in the dialog to a file in the local
        filesystem.
</p><a NAME="DiffDialog.show" ID="DiffDialog.show"></a>
<h4>DiffDialog.show</h4>
<b>show</b>(<i>filename = None</i>)
<p>
        Public slot to show the dialog.
</p><dl>
<dt><i>filename</i></dt>
<dd>
name of a file to use as the first file (string)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="DiffWindow" ID="DiffWindow"></a>
<h2>DiffWindow</h2>
<p>
    Main window class for the standalone dialog.
</p>
<h3>Derived from</h3>
QMainWindow
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#DiffWindow.__init__">DiffWindow</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#DiffWindow.eventFilter">eventFilter</a></td>
<td>Public method to filter events.</td>
</tr>
</table>
<a NAME="DiffWindow.__init__" ID="DiffWindow.__init__"></a>
<h4>DiffWindow (Constructor)</h4>
<b>DiffWindow</b>(<i>parent = None</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
reference to the parent widget (QWidget)
</dd>
</dl><a NAME="DiffWindow.eventFilter" ID="DiffWindow.eventFilter"></a>
<h4>DiffWindow.eventFilter</h4>
<b>eventFilter</b>(<i>obj, event</i>)
<p>
        Public method to filter events.
</p><dl>
<dt><i>obj</i></dt>
<dd>
reference to the object the event is meant for (QObject)
</dd><dt><i>event</i></dt>
<dd>
reference to the event object (QEvent)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
flag indicating, whether the event was handled (boolean)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="context_diff" ID="context_diff"></a>
<h2>context_diff</h2>
<b>context_diff</b>(<i>a, b, fromfile='', tofile='', fromfiledate='', tofiledate='', n=3, lineterm='\n'</i>)
<p>
    Compare two sequences of lines; generate the delta as a context diff.
</p><p>
    Context diffs are a compact way of showing line changes and a few
    lines of context.  The number of context lines is set by 'n' which
    defaults to three.
</p><p>
    By default, the diff control lines (those with *** or ---) are
    created with a trailing newline.  This is helpful so that inputs
    created from file.readlines() result in diffs that are suitable for
    file.writelines() since both the inputs and outputs have trailing
    newlines.
</p><p>
    For inputs that do not have trailing newlines, set the lineterm
    argument to "" so that the output will be uniformly newline free.
</p><p>
    The context diff format normally has a header for filenames and
    modification times.  Any or all of these may be specified using
    strings for 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
    The modification times are normally expressed in the format returned
    by time.ctime().  If not specified, the strings default to blanks.
</p><p>
    Example:
</p><p>
    <pre>
    &gt;&gt;&gt; print ''.join(context_diff('one\ntwo\nthree\nfour\n'.splitlines(1),
    ...       'zero\none\ntree\nfour\n'.splitlines(1), 'Original', 'Current',
    ...       'Sat Jan 26 23:30:50 1991', 'Fri Jun 06 10:22:46 2003')),
    *** Original Sat Jan 26 23:30:50 1991
    --- Current Fri Jun 06 10:22:46 2003
    ***************
    *** 1,4 ****
      one
    ! two
    ! three
      four
    --- 1,4 ----
    + zero
      one
    ! tree
      four
    </pre>
</p><dl>
<dt><i>a</i></dt>
<dd>
first sequence of lines (list of strings)
</dd><dt><i>b</i></dt>
<dd>
second sequence of lines (list of strings)
</dd><dt><i>fromfile</i></dt>
<dd>
filename of the first file (string)
</dd><dt><i>tofile</i></dt>
<dd>
filename of the second file (string)
</dd><dt><i>fromfiledate</i></dt>
<dd>
modification time of the first file (string)
</dd><dt><i>tofiledate</i></dt>
<dd>
modification time of the second file (string)
</dd><dt><i>n</i></dt>
<dd>
number of lines of context (integer)
</dd><dt><i>lineterm</i></dt>
<dd>
line termination string (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
a generator yielding lines of differences
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="unified_diff" ID="unified_diff"></a>
<h2>unified_diff</h2>
<b>unified_diff</b>(<i>a, b, fromfile='', tofile='', fromfiledate='', tofiledate='', n=3, lineterm='\n'</i>)
<p>
    Compare two sequences of lines; generate the delta as a unified diff.
</p><p>
    Unified diffs are a compact way of showing line changes and a few
    lines of context.  The number of context lines is set by 'n' which
    defaults to three.
</p><p>
    By default, the diff control lines (those with ---, +++, or @@) are
    created with a trailing newline.  This is helpful so that inputs
    created from file.readlines() result in diffs that are suitable for
    file.writelines() since both the inputs and outputs have trailing
    newlines.
</p><p>
    For inputs that do not have trailing newlines, set the lineterm
    argument to "" so that the output will be uniformly newline free.
</p><p>
    The unidiff format normally has a header for filenames and modification
    times.  Any or all of these may be specified using strings for
    'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.  The modification
    times are normally expressed in the format returned by time.ctime().
</p><p>
    Example:
</p><p>
    <pre>
    &gt;&gt;&gt; for line in unified_diff('one two three four'.split(),
    ...             'zero one tree four'.split(), 'Original', 'Current',
    ...             'Sat Jan 26 23:30:50 1991', 'Fri Jun 06 10:20:52 2003',
    ...             lineterm=''):
    ...     print line
    --- Original Sat Jan 26 23:30:50 1991
    +++ Current Fri Jun 06 10:20:52 2003
@ -1,4 +1,4 @@
    +zero
     one
    -two
    -three
    +tree
     four
    </pre>
</p><dl>
<dt><i>a</i></dt>
<dd>
first sequence of lines (list of strings)
</dd><dt><i>b</i></dt>
<dd>
second sequence of lines (list of strings)
</dd><dt><i>fromfile</i></dt>
<dd>
filename of the first file (string)
</dd><dt><i>tofile</i></dt>
<dd>
filename of the second file (string)
</dd><dt><i>fromfiledate</i></dt>
<dd>
modification time of the first file (string)
</dd><dt><i>tofiledate</i></dt>
<dd>
modification time of the second file (string)
</dd><dt><i>n</i></dt>
<dd>
number of lines of context (integer)
</dd><dt><i>lineterm</i></dt>
<dd>
line termination string (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
a generator yielding lines of differences
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
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