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README.md

Mergely

http://mergely.com

Mergely is a JavaScript component for differencing and merging files interactively in a browser (diff/merge), providing rich API that enables you to easily integrate Mergely into your existing web application. It is suitable for comparing text files online, for example, .txt, .html, .xml, .c, .cpp, .java, etc.

Mergely has a JavaScript implementation of the Longest Common Subsequence (LCS) diff algorithm, and a customizable markup engine.

Installation

Installation via webpack

The recommended way to install mergely and its dependencies is to use a Node package manager (npm or yarn) and webpack.

It is highly recommended that you start by cloning mergely-webpack. The webpack has everything that you need to get started.

Angular 6.1.1

You can also use mergely within angular. You can start by cloning mergely-angular.

Installation via .tgz

Unpack mergely.tgz into a folder, for example, ./lib, and add the following to the <head> of your target HTML source file.

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.32.0/codemirror.min.js"></script>
<link rel="stylesheet" media="all" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.32.0/codemirror.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.32.0/addon/search/searchcursor.min.js"></script>
<script src="lib/mergely/lib/mergely.js" type="text/javascript"></script>
<link rel="stylesheet" media="all" href="lib/mergely/lib/mergely.css" />

Create a div for the editor in <body>.

This example uses a style that provides 8px padding (mergely-full-screen-8):

<div class="mergely-full-screen-8">
  <div class="mergely-resizer">
    <div id="mergely"></div>
  </div>
</div>

Then initialize mergely, setting options as required.

$(document).ready(function () {
    $('#mergely').mergely();
});

Synchronous content initialization

The following example can be used to set the lhs and rhs editors synchronously (that is, when their contents are already known):

$(document).ready(function () {
    // set editor content
    $('#mergely').mergely({
        lhs: function(setValue) {
            setValue('the quick red fox\njumped over the hairy dog');
        },
        rhs: function(setValue) {
            setValue('the quick brown fox\njumped over the lazy dog');
        }
    });
});

Asynchronous initialization

If the editor contents are retrieved asynchronously (recommended), then retrieve the editor contents and set them:

$(document).ready(function () {
    // initialize mergely
    $('#mergely').mergely();
    
    // get async lhsResponse, then set lhs value
    $('#mergely').mergely('lhs', lhsResponse);
    
    // get async rhsResponse, then set rhs value
    $('#mergely').mergely('rhs', rhsResponse);
});

Options

Option Type Default value Description
autoresize boolean true Enables/disables the auto-resizing of the editor.
autoupdate boolean true Enables/disables the auto-updating of the editor when changes are made.
bgcolor string #eeeeee The background color that mergely fills the margin canvas with.
change_timeout number 500 The timeout, after a text change, before Mergely calculates a diff. Only used when readonly is enabled.
cmsettings object {mode: 'text/plain', readOnly: false} CodeMirror settings (see CodeMirror) that are combined with lhs_cmsettings and rhs_cmsettings.
editor_width string 400px Starting width.
editor_height string 400px Starting height.
fadein string fast A jQuery fadein value to enable the editor to fade in. Set to empty string to disable.
fgcolor string|number|object {a:'#4ba3fa', c:'#a3a3a3', d:'#ff7f7f', ca:'#4b73ff', cc:'#434343', cd:'#ff4f4f'} The foreground color that mergely marks changes with on the canvas. The value a is additions, c changes, d deletions, and the prefix c indicates current/active change (e.g. cd current delection).
ignorews boolean false Ignores white-space.
ignorecase boolean false Ignores case when differientiating.
lcs boolean true Enables/disables LCS computation for paragraphs (word-by-word changes). Disabling can give a performance gain for large documents.
license string lgpl The choice of license to use with Mergely. Valid values are: lgpl, gpl, mpl or lgpl-separate-notice, gpl-separate-notice, mpl-separate-notice (the license requirements are met in a separate notice file).
line_numbers boolean true Enables/disables line numbers. Enabling line numbers will toggle the visibility of the line number margins.
lhs_cmsettings object {} The CodeMirror settings (see CodeMirror) for the left-hand side editor.
resize_timeout number 500 The timeout, after a resize, before Mergely auto-resizes. Only used when autoresize enabled.
rhs_cmsettings object {} The CodeMirror settings (see CodeMirror) for the right-hand side editor.
rhs_margin string right Location for the rhs markup margin. Possible values: right, left.
sidebar boolean true Enables/disables sidebar markers. Disabling can give a performance gain for large documents.
vpcolor string rgba(0, 0, 200, 0.5) The margin/viewport indicator color.
viewport boolean false Enables/disables the viewport. Enabling the viewport can give a performance gain for large documents.
wrap_lines boolean false Enables/disables line wrapping. Enabling wrapping will wrap text to fit the editors.

Options - Callbacks

Option Parameters Description
lhs function setValue(string) A callback that allows the value of the left-hand editor to be set on initialization synchronously. A handle to a setValue function is passed as an argument to be used to initialize the editor.
loaded A callback to indicate that Mergely has finished initializing and is loaded.
resized A callback to indicate that the container window has been resized.
rhs function setValue(string) A callback that allows the value of the right-hand editor to be set on initialization synchronously. A handle to a setValue function is passed as an argument to be used to initialize the editor.

Methods

clear

Clears the editor contents for the specified side.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.

Example

$('#mergely').mergely('clear', 'lhs');

cm

Gets the CodeMirror editor for the specified side.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.

Example

$('#mergely').mergely('cm', 'lhs');

diff

Calculates and returns the current .diff file.

Parameters

None.

Example

$('#mergely').mergely('diff');

get

Gets the text editor contents for the specified side.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.

Example

$('#mergely').mergely('get', 'lhs');

lhs

Sets the value of the left-hand editor.

Parameters

Name Type Description
value string The editor text.

Example

$('#mergely').mergely('lhs', 'This is text');

merge

Merges whole file from the specified side to the opposite side.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.

Example

$('#mergely').mergely('merge', 'lhs');

mergeCurrentChange

Merges the current change from the specified side to the opposite side.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.

Example

$('#mergely').mergely('mergeCurrentChange', 'lhs');

options

Sets the editor options. Will automatically update with the new settings unless autoupdate is disabled, in which case, you will need to explicitly call update.

Parameters

Name Type Description
options object The options to set.

Example

$('#mergely').mergely('options', { line_numbers: true });

options

Gets the editor options.

Parameters

None.

Example

$('#mergely').mergely('options');

resize

Resizes the editor. It must be called explicitly if autoresize is disabled.

Parameters

None.

Example

$('#mergely').mergely('resize');

rhs

Sets the value of the right-hand editor.

Parameters

Name Type Description
value string The editor text.

Example

$('#mergely').mergely('rhs', 'This is text');

scrollTo

Scrolls the side to line number specified by num.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.
num number The line number.

Example

$('#mergely').mergely('scrollTo', 'lhs', 100);

scrollToDiff

Scrolls to the next change specified by direction.

Parameters

Name Type Description
direction string The direction to scroll, either prev or next.

Example

$('#mergely').mergely('scrollToDiff', 'next');

search

Search the editor for text, scrolling to the next available match. Repeating the call will find the next available token.

Parameters

Name Type Description
side string The editor side, either lhs or rhs.
text string The text to search.

Example

$('#mergely').mergely('search', 'lhs', 'needle');

swap

Swaps the content of the left and right editors.

Parameters

None.

Example

$('#mergely').mergely('swap');

unmarkup

Clears the editor markup.

Parameters

None.

Example

$('#mergely').mergely('unmarkup');

update

Manually updates the editor by recalculating the diff and applying new settings.

Parameters

None.

Example

$('#mergely').mergely('update');
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