modules/mode-line.js

   1 /**
   2  * (C) Copyright 2005 Shawn Betts
   3  * (C) Copyright 2007-2008 Jeremy Maitin-Shepard
   4  *
   5  * Use, modification, and distribution are subject to the terms specified in the
   6  * COPYING file.
   7 **/
   8
   9 require("mode.js");
  10
  11 define_window_local_hook("mode_line_hook");
  12
  13 function generic_element_widget_container(window, container)
  14 {
  15     this.window = window;
  16     this.container = container;
  17 }
  18 define_keywords("$flex", "$align", "$class", "$crop");
  19 generic_element_widget_container.prototype = {
  20     add_text_widget : function (widget) {
  21         keywords(arguments);
  22         var flex = arguments.$flex;
  23         var class_name = arguments.$class;
  24         var align = arguments.$align;
  25         var crop = arguments.$crop;
  26         var element = create_XUL(this.window, "label");
  27         if (flex != null)
  28             element.setAttribute("flex", flex);
  29         if (align != null)
  30             element.setAttribute("align", align);
  31         if (class_name == null)
  32             class_name = widget.name;
  33         element.setAttribute("class", class_name);
  34         if (crop == null)
  35             crop = widget.crop;
  36         element.setAttribute("crop", crop);
  37         element.conkeror_widget = new generic_widget_element(element, widget);
  38         this.container.appendChild(element);
  39         return element.conkeror_widget;
  40     },
  41     destroy : function() {
  42         var children = this.container.childNodes;
  43         for (var i = 0; i < children.length; ++i)
  44             children.item(i).conkeror_widget.destroy();
  45     }
  46 };
  47
  48 function mode_line(window)
  49 {
  50     var element = create_XUL(window, "hbox");
  51     element.setAttribute("class", "mode-line");
  52     /* FIXME: this will need to changed to be buffer-local */
  53     var insert_before = window.document.getElementById("minibuffer");
  54     insert_before.parentNode.insertBefore(element, insert_before);
  55     window.mode_line = this;
  56     generic_element_widget_container.call(this, window, element);
  57     mode_line_hook.run(window, this);
  58 }
  59 mode_line.prototype = {
  60     __proto__: generic_element_widget_container.prototype,
  61
  62     uninstall: function () {
  63         this.container.parentNode.removeChild(this.window.mode_line.container);
  64         this.__proto__.__proto__.destroy.call(this);
  65     }
  66 };
  67
  68
  69 function generic_widget_element(element, widget)
  70 {
  71     this.element = element;
  72     this.widget = widget;
  73     widget.attach(this);
  74 }
  75
  76 generic_widget_element.prototype = {
  77     get text () {
  78         return this.element.getAttribute("value");
  79     },
  80
  81     set text (v) {
  82         this.element.setAttribute("value", v);
  83     },
  84
  85     destroy : function () {
  86         this.widget.destroy();
  87     },
  88
  89     remove : function () {
  90         this.element.parentNode.removeChild(this.element);
  91         this.destroy();
  92     }
  93 };
  94
  95
  96 function text_widget(window)
  97 {
  98     this.window_hooks = [];
  99     this.window = window;
 100 }
 101 text_widget.prototype = {
 102     add_hook : function (hook_name, handler)
 103     {
 104         var obj = this;
 105         if (handler == null) handler = function () { obj.update(); }
 106         add_hook.call(this.window, hook_name, handler);
 107         this.window_hooks.push([hook_name, handler]);
 108     },
 109
 110     view : null,
 111
 112     attach : function (view) {
 113         this.view = view;
 114         this.update();
 115     },
 116
 117     update : function () {
 118     },
 119
 120     destroy : function ()
 121     {
 122         for each (let i in this.window_hooks) {
 123             remove_hook.call(this.window, i[0], i[1]);
 124         }
 125     },
 126
 127     remove : function ()
 128     {
 129         this.view.remove();
 130     }
 131 };
 132
 133 define_global_window_mode("mode_line", "window_initialize_early_hook");
 134
 135 function current_buffer_name_widget(window) {
 136     this.name = "current-buffer-name-widget";
 137     text_widget.call(this, window);
 138     this.crop = "end";
 139     this.add_hook("current_content_buffer_location_change_hook");
 140     this.add_hook("select_buffer_hook");
 141 }
 142 current_buffer_name_widget.prototype.__proto__ = text_widget.prototype;
 143 current_buffer_name_widget.prototype.update = function () {
 144     this.view.text = this.window.buffers.current.description;
 145 };
 146
 147 function current_buffer_scroll_position_widget(window) {
 148     this.name = "current-buffer-scroll-position-widget";
 149     text_widget.call(this, window);
 150     this.add_hook("current_buffer_scroll_hook");
 151     this.add_hook("select_buffer_hook");
 152     this.add_hook("current_content_buffer_location_change_hook");
 153     this.add_hook("current_content_buffer_focus_change_hook");
 154 }
 155 current_buffer_scroll_position_widget.prototype.__proto__ = text_widget.prototype;
 156 current_buffer_scroll_position_widget.prototype.update = function () {
 157     var b = this.window.buffers.current;
 158     var scrollX, scrollY, scrollMaxX, scrollMaxY;
 159     if (b instanceof content_buffer)
 160     {
 161         var w = b.focused_frame;
 162         scrollX = w.scrollX;
 163         scrollY = w.scrollY;
 164         scrollMaxX = w.scrollMaxX;
 165         scrollMaxY = w.scrollMaxY;
 166     } else
 167     {
 168         scrollX = b.scrollX;
 169         scrollY = b.scrollY;
 170         scrollMaxX = b.scrollMaxX;
 171         scrollMaxY = b.scrollMaxY;
 172     }
 173     var x = scrollMaxX == 0 ? 100 : Math.round(scrollX / scrollMaxX * 100);
 174     var y = scrollMaxY == 0 ? 100 : Math.round(scrollY / scrollMaxY * 100);
 175     this.view.text = "(" + x + ", " + y + ")";
 176 };
 177
 178 function clock_widget(window)
 179 {
 180     this.name = "clock-widget";
 181     text_widget.call(this, window);
 182     var obj = this;
 183     this.timer_ID = window.setInterval(function () { obj.update(); }, 60000);
 184 }
 185 clock_widget.prototype.__proto__ = text_widget.prototype;
 186 clock_widget.prototype.update = function () {
 187     var time = new Date();
 188     var hours = time.getHours();
 189     var mins = time.getMinutes();
 190     this.view.text = (hours<10 ? "0" + hours:hours) + ":" + (mins<10 ?"0" +mins:mins);
 191 };
 192 clock_widget.prototype.destroy = function () {
 193     this.window.clearTimeout(this.timer_ID);
 194 };
 195
 196 function buffer_count_widget(window) {
 197     this.name = "buffer-count-widget";
 198     text_widget.call(this, window);
 199     this.add_hook("select_buffer_hook");
 200     this.add_hook("create_buffer_hook");
 201     this.add_hook("kill_buffer_hook");
 202 }
 203 buffer_count_widget.prototype.__proto__ = text_widget.prototype;
 204 buffer_count_widget.prototype.update = function () {
 205     this.view.text = ("[" + (this.window.buffers.selected_index+1) + "/" +
 206                       this.window.buffers.count + "]");
 207 };
 208
 209 function mode_line_adder(widget_constructor) {
 210     if (!('mode_line_adder' in widget_constructor))
 211         widget_constructor.mode_line_adder = function (window) {
 212             window.mode_line.add_text_widget(new widget_constructor(window));
 213         };
 214     return widget_constructor.mode_line_adder;
 215 }
 216
 217 add_hook("mode_line_hook", mode_line_adder(current_buffer_name_widget));
 218 add_hook("mode_line_hook", mode_line_adder(clock_widget));
 219 add_hook("mode_line_hook", mode_line_adder(current_buffer_scroll_position_widget));
 220
 221 mode_line_mode(true);