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// Copyright (c) IPython Development Team.
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// Distributed under the terms of the Modified BSD License.
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define([
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'base/js/namespace',
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'jquery',
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'base/js/utils',
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'base/js/dialog',
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], function(IPython, $, utils, dialog) {
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"use strict";
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var platform = utils.platform;
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var QuickHelp = function (options) {
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/**
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* Constructor
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*
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* Parameters:
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* options: dictionary
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* Dictionary of keyword arguments.
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* events: $(Events) instance
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* keyboard_manager: KeyboardManager instance
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* notebook: Notebook instance
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*/
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this.keyboard_manager = options.keyboard_manager;
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this.notebook = options.notebook;
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this.keyboard_manager.quick_help = this;
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this.events = options.events;
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};
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var cmd_ctrl = 'Ctrl-';
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var platform_specific;
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if (platform === 'MacOS') {
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// Mac OS X specific
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cmd_ctrl = 'Cmd-';
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platform_specific = [
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{ shortcut: "Cmd-Up", help:"go to cell start" },
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{ shortcut: "Cmd-Down", help:"go to cell end" },
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{ shortcut: "Alt-Left", help:"go one word left" },
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{ shortcut: "Alt-Right", help:"go one word right" },
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{ shortcut: "Alt-Backspace", help:"del word before" },
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{ shortcut: "Alt-Delete", help:"del word after" },
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];
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} else {
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// PC specific
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platform_specific = [
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{ shortcut: "Ctrl-Home", help:"go to cell start" },
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{ shortcut: "Ctrl-Up", help:"go to cell start" },
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{ shortcut: "Ctrl-End", help:"go to cell end" },
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{ shortcut: "Ctrl-Down", help:"go to cell end" },
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{ shortcut: "Ctrl-Left", help:"go one word left" },
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{ shortcut: "Ctrl-Right", help:"go one word right" },
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{ shortcut: "Ctrl-Backspace", help:"del word before" },
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{ shortcut: "Ctrl-Delete", help:"del word after" },
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];
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}
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var cm_shortcuts = [
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{ shortcut:"Tab", help:"code completion or indent" },
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{ shortcut:"Shift-Tab", help:"tooltip" },
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{ shortcut: cmd_ctrl + "]", help:"indent" },
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{ shortcut: cmd_ctrl + "[", help:"dedent" },
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{ shortcut: cmd_ctrl + "a", help:"select all" },
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{ shortcut: cmd_ctrl + "z", help:"undo" },
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{ shortcut: cmd_ctrl + "Shift-z", help:"redo" },
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{ shortcut: cmd_ctrl + "y", help:"redo" },
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].concat( platform_specific );
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var mac_humanize_map = {
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// all these are unicode, will probably display badly on anything except macs.
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// these are the standard symbol that are used in MacOS native menus
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// cf http://apple.stackexchange.com/questions/55727/
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// for htmlentities and/or unicode value
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'cmd':'⌘',
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'shift':'⇧',
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'alt':'⌥',
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'up':'↑',
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'down':'↓',
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'left':'←',
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'right':'→',
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'eject':'⏏',
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'tab':'⇥',
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'backtab':'⇤',
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'capslock':'⇪',
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'esc':'⎋',
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'ctrl':'⌃',
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'enter':'↩',
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'pageup':'⇞',
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'pagedown':'⇟',
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'home':'↖',
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'end':'↘',
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'altenter':'⌤',
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'space':'␣',
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'delete':'⌦',
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'backspace':'⌫',
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'apple':'',
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};
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var default_humanize_map = {
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'shift':'Shift',
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'alt':'Alt',
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'up':'Up',
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'down':'Down',
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'left':'Left',
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'right':'Right',
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'tab':'Tab',
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'capslock':'Caps Lock',
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'esc':'Esc',
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'ctrl':'Ctrl',
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'enter':'Enter',
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'pageup':'Page Up',
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'pagedown':'Page Down',
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'home':'Home',
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'end':'End',
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'space':'Space',
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'backspace':'Backspace',
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};
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var humanize_map;
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if (platform === 'MacOS'){
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humanize_map = mac_humanize_map;
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} else {
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humanize_map = default_humanize_map;
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}
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function humanize_key(key){
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if (key.length === 1){
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key = key.toUpperCase();
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}
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return humanize_map[key.toLowerCase()]||key;
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}
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function humanize_sequence(sequence){
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var joinchar = ',';
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var hum = _.map(sequence.replace(/meta/g, 'cmd').split(','), humanize_shortcut).join(joinchar);
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return hum;
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}
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function humanize_shortcut(shortcut){
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var joinchar = '-';
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if (platform === 'MacOS'){
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joinchar = '';
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}
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var sh = _.map(shortcut.split('-'), humanize_key ).join(joinchar);
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return sh;
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}
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QuickHelp.prototype.show_keyboard_shortcuts = function () {
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/**
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* toggles display of keyboard shortcut dialog
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*/
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var that = this;
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if ( this.force_rebuild ) {
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this.shortcut_dialog.remove();
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delete(this.shortcut_dialog);
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this.force_rebuild = false;
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}
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if ( this.shortcut_dialog ){
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// if dialog is already shown, close it
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$(this.shortcut_dialog).modal("toggle");
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return;
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}
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var command_shortcuts = this.keyboard_manager.command_shortcuts.help();
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var edit_shortcuts = this.keyboard_manager.edit_shortcuts.help();
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var help, shortcut;
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var i, half, n;
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var element = $('<div/>');
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// The documentation
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var doc = $('<div/>').addClass('alert alert-warning');
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doc.append(
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$('<button/>').addClass('close').attr('data-dismiss','alert').html('×')
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).append(
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'The IPython Notebook has two different keyboard input modes. <b>Edit mode</b> '+
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'allows you to type code/text into a cell and is indicated by a green cell '+
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'border. <b>Command mode</b> binds the keyboard to notebook level actions '+
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'and is indicated by a grey cell border.'
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);
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element.append(doc);
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// Command mode
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var cmd_div = this.build_command_help();
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element.append(cmd_div);
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// Edit mode
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var edit_div = this.build_edit_help(cm_shortcuts);
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element.append(edit_div);
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this.shortcut_dialog = dialog.modal({
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title : "Keyboard shortcuts",
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body : element,
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destroy : false,
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buttons : {
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Close : {}
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},
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notebook: this.notebook,
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keyboard_manager: this.keyboard_manager,
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});
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this.shortcut_dialog.addClass("modal_stretch");
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this.events.on('rebuild.QuickHelp', function() { that.force_rebuild = true;});
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};
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QuickHelp.prototype.build_command_help = function () {
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var command_shortcuts = this.keyboard_manager.command_shortcuts.help();
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return build_div('<h4>Command Mode (press <code>Esc</code> to enable)</h4>', command_shortcuts);
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};
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var special_case = { pageup: "PageUp", pagedown: "Page Down", 'minus': '-' };
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var prettify = function (s) {
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s = s.replace(/-$/, 'minus'); // catch shortcuts using '-' key
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var keys = s.split('-');
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var k, i;
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for (i=0; i < keys.length; i++) {
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k = keys[i];
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if ( k.length == 1 ) {
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keys[i] = "<code><strong>" + k + "</strong></code>";
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continue; // leave individual keys lower-cased
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}
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if (k.indexOf(',') === -1){
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keys[i] = ( special_case[k] ? special_case[k] : k.charAt(0).toUpperCase() + k.slice(1) );
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}
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keys[i] = "<code><strong>" + keys[i] + "</strong></code>";
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}
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return keys.join('-');
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};
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QuickHelp.prototype.build_edit_help = function (cm_shortcuts) {
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var edit_shortcuts = this.keyboard_manager.edit_shortcuts.help();
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jQuery.merge(cm_shortcuts, edit_shortcuts);
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return build_div('<h4>Edit Mode (press <code>Enter</code> to enable)</h4>', cm_shortcuts);
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};
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var build_one = function (s) {
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var help = s.help;
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var shortcut = '';
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if(s.shortcut){
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shortcut = prettify(humanize_sequence(s.shortcut));
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}
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return $('<div>').addClass('quickhelp').
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append($('<span/>').addClass('shortcut_key').append($(shortcut))).
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append($('<span/>').addClass('shortcut_descr').text(' : ' + help));
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};
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var build_div = function (title, shortcuts) {
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var i, half, n;
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var div = $('<div/>').append($(title));
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var sub_div = $('<div/>').addClass('container-fluid');
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var col1 = $('<div/>').addClass('col-md-6');
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var col2 = $('<div/>').addClass('col-md-6');
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n = shortcuts.length;
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half = ~~(n/2); // Truncate :)
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for (i=0; i<half; i++) { col1.append( build_one(shortcuts[i]) ); }
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for (i=half; i<n; i++) { col2.append( build_one(shortcuts[i]) ); }
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sub_div.append(col1).append(col2);
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div.append(sub_div);
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return div;
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};
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// Backwards compatability.
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IPython.QuickHelp = QuickHelp;
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return {'QuickHelp': QuickHelp};
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});
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