jq-console-altgr
v2.16.0
Published
Feature complete web terminal (with AltGr support)
Downloads
4
Maintainers
Readme
jq-console-altgr
Note: this is a fork from replit/jq-console which applies a partially applies a patch by pasieronen to support the AltGr-key on non-US keyboards.
This allows to type square brackets as well as curly braces i.e. on a Austrian/German Keyboards
A jQuery terminal plugin written in CoffeeScript.
This project was spawned because of our need for a simple web terminal plugin for the repl.it project. It tries to simulate a low level terminal by providing (almost) raw input/output streams as well as input and output states.
Version 2.0 adds baked-in support for rich multi-line prompting and operation queueing.
Tested Browsers
The plugin has been tested on the following browsers:
- IE 9+
- Chrome
- Firefox
- Opera
- iOS Safari and Chrome
- Android Chrome
Getting Started
Echo example
/* The console container element */
#console {
position: absolute;
width: 400px;
height: 500px;
background-color:black;
}
/* The inner console element. */
.jqconsole {
padding: 10px;
}
/* The cursor. */
.jqconsole-cursor {
background-color: gray;
}
/* The cursor color when the console looses focus. */
.jqconsole-blurred .jqconsole-cursor {
background-color: #666;
}
/* The current prompt text color */
.jqconsole-prompt {
color: #0d0;
}
/* The command history */
.jqconsole-old-prompt {
color: #0b0;
font-weight: normal;
}
/* The text color when in input mode. */
.jqconsole-input {
color: #dd0;
}
/* Previously entered input. */
.jqconsole-old-input {
color: #bb0;
font-weight: normal;
}
/* The text color of the output. */
.jqconsole-output {
color: white;
}
<div id="console"></div>
<script src="jquery.js" type="text/javascript" charset="utf-8"></script>
<script src="jqconsole.js" type="text/javascript" charset="utf-8"></script>
<script>
$(function () {
var jqconsole = $('#console').jqconsole('Hi\n', '>>>');
var startPrompt = function () {
// Start the prompt with history enabled.
jqconsole.Prompt(true, function (input) {
// Output input with the class jqconsole-output.
jqconsole.Write(input + '\n', 'jqconsole-output');
// Restart the prompt.
startPrompt();
});
};
startPrompt();
});
</script>
Instantiating
$(div).jqconsole(welcomeString, promptLabel, continueLabel, disableAutoFocus);
div
is the div element or selector. Note that this element must be explicity sized and positionedabsolute
orrelative
.welcomeString
is the string to be shown when the terminal is first rendered.promptLabel
is the label to be shown before the input when using Prompt().continueLabel
is the label to be shown before the continued lines of the input when using Prompt().disableAutoFocus
is a boolean indicating whether we should disable the default auto-focus behavior.
Configuration
There isn't much initial configuration needed, because the user must supply options and callbacks with each state change. There are a few config methods provided to create custom shortcuts and change indentation width:
jqconsole.RegisterShortcut
Registers a callback for a keyboard shortcut. Takes two arguments:
(int|string) keyCode: The code of the key pressing which (when Ctrl is held) will trigger this shortcut. If a string is provided, the ASCII code of the first character is taken.
function callback: A function called when the shortcut is pressed; "this" will point to the JQConsole object.
Example:
// Ctrl+R: resets the console.
jqconsole.RegisterShortcut('R', function() {
this.Reset();
});
jqconsole.SetIndentWidth
Sets the number of spaces inserted when indenting and removed when unindenting. Takes one argument:
- int width: The number of spaces in each indentation level.
Example:
// Sets the indent width to 4 spaces.
jqconsole.SetIndentWidth(4);
jqconsole.RegisterMatching
Registers an opening and closing characters to match and wraps each of the opening and closing characters with a span with the specified class. Takes one parameters:
- char open: The opening character of a "block".
- char close: The closing character of a "block".
- string class: The css class that is applied to the matched characters.
Example:
jqconsole.RegisterMatching('{', '}', 'brackets');
Usage
Unlike most terminal plugins, jq-console gives you complete low-level control over the execution; you have to call the appropriate methods to start input or output:
jqconsole.Input:
Asks user for input. If another input or prompt operation is currently underway, the new input operation is enqueued and will be called when the current operation and all previously enqueued operations finish. Takes one argument:
- function input_callback: A function called with the user's input when the user presses Enter and the input operation is complete.
Example:
// Echo the input.
jqconsole.Input(function(input) {
jqconsole.Write(input);
});
jqconsole.Prompt
Asks user for input. If another input or prompt operation is currently underway the new prompt operation is enqueued and will be called when the current peration and all previously enqueued operations finish. Takes four arguments:
bool history_enabled: Whether this input should use history. If true, the user can select the input from history, and their input will also be added as a new history item.
function result_callback: A function called with the user's input when the user presses Enter and the prompt operation is complete.
function multiline_callback: If specified, this function is called when the user presses Enter to check whether the input should continue to the next line. The function must return one of the following values:
false
: the input operation is completed.0
: the input continues to the next line with the current indent.N
(int): the input continues to the next line, and the current indent is adjusted byN
, e.g.-2
to unindent two levels.
bool async_multiline: Whether the multiline callback function should be treated as an asynchronous operation and be passed a continuation function that should be called with one of the return values mentioned above:
false
/0
/N
.
Example:
jqconsole.Prompt(true, function(input) {
// Alert the user with the command.
alert(input);
}, function (input) {
// Continue if the last character is a backslash.
return /\\$/.test(input);
});
jqconsole.AbortPrompt
Aborts the current prompt operation and returns to output mode or the next queued input/prompt operation. Takes no arguments.
Example:
jqconsole.Prompt(true, function(input) {
alert(input);
});
// Give the user 2 seconds to enter the command.
setTimeout(function() {
jqconsole.AbortPrompt();
}, 2000);
jqconsole.Write
Writes the given text to the console in a <span>
, with an
optional class. If a prompt is currently being shown, the text is inserted
before it. Takes two arguments:
string text: The text to write.
string cls: The class to give the span containing the text. Optional.
bool escape: Whether the text to write should be html escaped. Optional, defaults to true.
Examples:
jqconsole.Write(output, 'my-output-class')
jqconsole.Write(err.message, 'my-error-class')
jqconsole.Append
Append the given node to the DOM. If a prompt is currently being shown, the text is inserted before it. Takes a single argument:
- (string|Element) node: The DOM Element or html string to append to the console just before the prompt.
Example:
// Add a div with the text 'hello' on a red background using jquery
jqconsole.Append($('<div>hello</div>').css('background-color', 'red'));
// We can also use document.createElement
node = document.createElement("div");
content = document.createTextNode("hello");
node.appendChild(content);
jqconsole.Append(node);
jqconsole.SetPromptText
Sets the text currently in the input prompt. Takes one parameter:
- string text: The text to put in the prompt.
Examples:
jqconsole.SetPromptText('ls')
jqconsole.SetPromptText('print [i ** 2 for i in range(10)]')
jqconsole.SetPromptLabel
Replaces the main prompt label. Takes two parameters:
- string main_label: String to replace the main prompt label.
- string continuation_label: String to replace the continuation prompt label. Optional.
Examples:
jqconsole.SetPromptLabel('$')
jqconsole.SetPromptLabel(' $','..')
jqconsole.ClearPromptText
Clears all the text currently in the input prompt. Takes one parameter:
- bool clear_label: If specified and true, also clears the main prompt label (e.g. ">>>").
Example:
jqconsole.ClearPromptText()
jqconsole.GetPromptText
Returns the contents of the prompt. Takes one parameter:
- bool full: If specified and true, also includes the prompt labels (e.g. ">>>").
Examples:
var currentCommand = jqconsole.GetPromptText()
var logEntry = jqconsole.GetPromptText(true)
jqconsole.Reset
Resets the console to its initial state, cancelling all current and pending operations. Takes no parameters.
Example:
jqconsole.Reset()
jqconsole.SetKeyPressHandler
Sets a custom key press handler to be executed before the internal jqconsole handler. If it returns false then jqconsole will ignore the event. This gives you control over what events jqconsole can handle and for you to do your custom work.
- function handler: An event handler function returning true or false.
Example:
// Don't allow the character 'x' for no reason :P
jqconsole.SetKeyPressHanlder(function(e) {
if (String.fromCharCode(e.which) === 'x') {
return false;
}
});
jqconsole.SetControlKeyHandler
Allows you to handle key events that are not characters (keydown events). You can return false to prevent the default. See demo for full example.
- function handler: An event handler function returning true or false.
Example:
// Show auto-complete on tab keys
jqconsole.SetKeyPressHanlder(function(e) {
if (e.which === 9) {
$('.suggestions').show();
return false;
}
});
jqconsole.GetColumn
Returns the 0-based number of the column on which the cursor currently is. Takes no parameters.
Example:
// Show the current line and column in a status area.
$('#status').text(jqconsole.GetLine() + ', ' + jqconsole.GetColumn())
jqconsole.GetLine
Returns the 0-based number of the line on which the cursor currently is. Takes no parameters.
Example:
// Show the current line and column in a status area.
$('#status').text(jqconsole.GetLine() + ', ' + jqconsole.GetColumn())
jqconsole.Focus
Forces the focus onto the console so events can be captured. Takes no parameters.
Example:
// Redirect focus to the console whenever the user clicks anywhere.
$(window).click(function() {
jqconsole.Focus();
})
jqconsole.GetIndentWidth
Returns the number of spaces inserted when indenting. Takes no parameters.
Example:
jqconsole.SetIndentWidth(4);
console.assert(jqconsole.GetIndentWidth() == 4);
jqconsole.UnRegisterMatching
Deletes a certain matching settings set by jqconsole.RegisterMatching
.
Takes two paramaters:
- char open: The opening character of a "block".
- char close: The closing character of a "block".
Example:
jqconsole.UnRegisterMatching('{', '}');
jqconsole.Dump
Returns the text content of the console.
jqconsole.GetState
Returns the current state of the console. Could be one of the following:
- Input:
"input"
- Output:
"output"
- Prompt:
"prompt"
Example:
jqconsole.GetState(); //output
jqconsole.MoveToStart
Moves the cursor to the start of the current line. Takes one parameter:
- bool all_lines: If true moves the cursor to the beginning of the first line in the current prompt. Defaults to false.
Example:
// Move to line start Ctrl+A.
jqconsole.RegisterShortcut('A', function() {
jqconsole.MoveToStart();
handler();
});
jqconsole.MoveToEnd
Moves the cursor to the end of the current line. Takes one parameter:
- bool all_lines: If true moves the cursor to the end of the first line in the current prompt. Defaults to false.
Example:
// Move to line end Ctrl+E.
jqconsole.RegisterShortcut('E', function() {
jqconsole.MoveToEnd();
handler();
});
jqconsole.Disable
Disables input and focus on the console.
jqconsole.Enable
Enables input and focus on the console.
jqconsole.IsDisabled
Returns true if the console is disabled.
jqconsole.GetHistory
Returns the contents of the history buffer.
jqconsole.SetHistory
Set the history buffer to the given array.
Takes one parameter:
- array history: The history buffer to use.
Example:
jqconsole.SetHistory(['a = 3', 'a + 3']);
jqconsole.ResetHistory
Resets the console history.
jqconsole.ResetMatchings
Resets the character matching configuration.
jqconsole.ResetShortcuts
Resets the shortcut configuration.
jqconsole.Clear
Clears the console's content excluding the current prompt
Default Key Config
The console responds to the followind keys and key combinations by default:
Delete
: Delete the following character.Ctrl+Delete
: Delete the following word.Backspace
: Delete the preceding character.Ctrl+Backspace
: Delete the preceding word.Ctrl+Left
: Move one word to the left.Ctrl+Right
: Move one word to the right.Home
: Move to the beginning of the current line.Ctrl+Home
: Move to the beginnig of the first line.End
: Move to the end of the current line.Ctrl+End
: Move to the end of the last line.Shift+Up
,Ctrl+Up
: Move cursor to the line above the current one.Shift+Down
,Ctrl+Down
: Move cursor to the line below the current one.Tab
: Indent.Shift+Tab
: Unindent.Up
: Previous history item.Down
: Next history item.Enter
: Finish input/prompt operation. See Input() and Prompt() for details.Shift+Enter
: New line.Page Up
: Scroll console one page up.Page Down
: Scroll console one page down.
ANSI escape code SGR support
jq-console implements a large subset of the ANSI escape code graphics.
Using the .Write
method you could add style to the console using
the following syntax:
ASCII 27 (decimal) or 0x1b (hex)
[
SGR code
m
Example:
jqconsole.Write('\033[31mRed Text');
Note that the third parameter escape
must be true which defaults to it.
You'll need to include the ansi.css
file for default effects or create your
own using the css classes from the table below.
SGR
Colors
CSS Classes
Several CSS classes are provided to help stylize the console:
jqconsole
: The main console container.jqconsole, jqconsole-blurred
: The main console container, when not in focus.jqconsole-cursor
: The cursor.jqconsole-header
: The welcome message at the top of the console.jqconsole-input
: The prompt area during input. May have multiple lines.jqconsole-old-input
: Previously-entered inputs.jqconsole-prompt
: The prompt area during prompting. May have multiple lines.jqconsole-old-prompt
: Previously-entered prompts.jqconsole-composition
: The div encapsulating the composition of multi-byte characters.jqconsole-prompt-text
: the text entered in the current prompt
Of course, custom classes may be specified when using jqconsole.Write()
for
further customization.