Mergely is a javascript component to diff/merge files interactively in a browser, providing rich API that enables you to easily integrate Mergely into your existing web application. It is suitable for comparing text files online, e.g. .txt, .html, .xml, .c, .cpp, .java, etc. Mergely has a javascript implementation of the Longest Common Subsequence diff algorithm (LCS) and a customizable markup engine.
The recommended way to install mergely is to use npm and webpack to install mergely and its dependencies. It is highly recommended that you start by cloning mergely-webpack. It has everything that you need to get started.
Unpack mergely.tgz into a folder, e.g. ./lib, and then 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();
});The following example can be used to set the lhs and rhs editors synchronously (i.e. their contents are already known):
$(document).ready(function () {
// initialize mergely
$('#mergely').mergely();
// 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');
}
});
});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);
});| 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 calcualtes a diff. Only used when readonly 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 spearate 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 is either right or 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. |
Clears the editor contents for the specified side.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
$('#mergely').mergely('clear', 'lhs');Gets the CodeMirror editor for the specified side.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
$('#mergely').mergely('cm', 'lhs');Calculates and returns the current .diff file.
None.
$('#mergely').mergely('diff');Gets the text editor contents for the specified side.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
$('#mergely').mergely('get', 'lhs');Sets the value of the left-hand editor.
| Name | Type | Description |
|---|---|---|
| value | string | The editor text. |
$('#mergely').mergely('lhs', 'This is text');Merges whole file from the specified side to the opposite side.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
$('#mergely').mergely('merge', 'lhs');Merges the current change from the specified side to the opposite side.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
$('#mergely').mergely('mergeCurrentChange', 'lhs');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.
| Name | Type | Description |
|---|---|---|
| options | object | The options to set. |
$('#mergely').mergely('options', { line_numbers: true });Gets the editor options.
None.
$('#mergely').mergely('options');Resize the editor. Must be called explicitly if autoresize is disabled.
None.
$('#mergely').mergely('resize');Sets the value of the right-hand editor.
| Name | Type | Description |
|---|---|---|
| value | string | The editor text. |
$('#mergely').mergely('rhs', 'This is text');Scrolls the side to line number specified by num.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
| num | number | The line number. |
$('#mergely').mergely('scrollTo', 'lhs', 100);Scrolls to the next change specified by direction.
| Name | Type | Description |
|---|---|---|
| direction | string | The direction to scroll, either prev or next. |
$('#mergely').mergely('scrollToDiff', 'next');Search the editor for text, scrolling to the next available match. Repeating the call will find the next available token.
| Name | Type | Description |
|---|---|---|
| side | string | The editor side, either lhs or rhs. |
| text | string | The text to search. |
$('#mergely').mergely('search', 'lhs', 'needle');Swap the content of the left and right editors.
None.
$('#mergely').mergely('swap');Clears the editor markup.
None.
$('#mergely').mergely('unmarkup');Manual update; recalculates diff and applies new settings.
None.
$('#mergely').mergely('update');