gnome-shell/js/ui/calendar.js

183 lines
6.6 KiB
JavaScript
Raw Normal View History

/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const St = imports.gi.St;
const Gettext_gtk20 = imports.gettext.domain('gtk20');
const MSECS_IN_DAY = 24 * 60 * 60 * 1000;
function _sameDay(dateA, dateB) {
return (dateA.getDate() == dateB.getDate() &&
dateA.getMonth() == dateB.getMonth() &&
dateA.getYear() == dateB.getYear());
}
function Calendar() {
this._init();
};
Calendar.prototype = {
_init: function() {
// FIXME: This is actually the fallback method for GTK+ for the week start;
// GTK+ by preference uses nl_langinfo (NL_TIME_FIRST_WEEKDAY). We probably
// should add a C function so we can do the full handling.
this._weekStart = NaN;
let weekStartString = Gettext_gtk20.gettext("calendar:week_start:0");
if (weekStartString.indexOf("calendar:week_start:") == 0) {
this._weekStart = parseInt(weekStartString.substring(20));
}
if (isNaN(this._weekStart) || this._weekStart < 0 || this._weekStart > 6) {
log("Translation of 'calendar:week_start:0' in GTK+ is not correct");
this._weekStart = 0;
}
// Find the ordering for month/year in the calendar heading
switch (Gettext_gtk20.gettext("calendar:MY")) {
case "calendar:MY":
this._headerFormat = "%B %Y";
break;
case "calendar:YM":
this._headerFormat = "%Y %B";
break;
default:
log("Translation of 'calendar:MY' in GTK+ is not correct");
this._headerFormat = "%B %Y";
break;
}
// Start off with the current date
this.date = new Date();
this.actor = new St.Table({ homogeneous: false,
style_class: "calendar",
reactive: true });
this.actor.connect('scroll-event',
Lang.bind(this, this._onScroll));
// Top line of the calendar '<| September 2009 |>'
this._topBox = new St.BoxLayout();
this.actor.add(this._topBox,
{ row: 0, col: 0, col_span: 7 });
let [backlabel, forwardlabel] = ["&lt;", "&gt;"];
if (St.Widget.get_default_direction () == St.TextDirection.RTL) {
[backlabel, forwardlabel] = [forwardlabel, backlabel];
}
let back = new St.Button({ label: backlabel, style_class: 'calendar-change-month' });
this._topBox.add(back);
back.connect("clicked", Lang.bind(this, this._prevMonth));
this._dateLabel = new St.Label();
this._topBox.add(this._dateLabel, { expand: true, x_fill: false, x_align: St.Align.MIDDLE });
let forward = new St.Button({ label: forwardlabel, style_class: 'calendar-change-month' });
this._topBox.add(forward);
forward.connect("clicked", Lang.bind(this, this._nextMonth));
// We need to figure out the abbreviated localized names for the days of the week;
// we do this by just getting the next 7 days starting from right now and then putting
// them in the right cell in the table. It doesn't matter if we add them in order
let iter = new Date(this.date);
iter.setSeconds(0); // Leap second protection. Hah!
iter.setHours(12);
for (let i = 0; i < 7; i++) {
this.actor.add(new St.Label({ text: iter.toLocaleFormat("%a") }),
{ row: 1,
col: (7 + iter.getDay() - this._weekStart) % 7,
x_fill: false, x_align: 1.0 });
iter.setTime(iter.getTime() + MSECS_IN_DAY);
}
// All the children after this are days, and get removed when we update the calendar
this._firstDayIndex = this.actor.get_children().length;
this._update();
},
// Sets the calendar to show a specific date
setDate: function(date) {
if (!_sameDay(date, this.date)) {
this.date = date;
this._update();
}
},
_onScroll : function(actor, event) {
switch (event.get_scroll_direction()) {
case Clutter.ScrollDirection.UP:
case Clutter.ScrollDirection.LEFT:
this._prevMonth();
break;
case Clutter.ScrollDirection.DOWN:
case Clutter.ScrollDirection.RIGHT:
this._nextMonth();
break;
}
},
_prevMonth: function() {
if (this.date.getMonth() == 0) {
this.date.setMonth(11);
this.date.setFullYear(this.date.getFullYear() - 1);
} else {
this.date.setMonth(this.date.getMonth() - 1);
}
this._update();
},
_nextMonth: function() {
if (this.date.getMonth() == 11) {
this.date.setMonth(0);
this.date.setFullYear(this.date.getFullYear() + 1);
} else {
this.date.setMonth(this.date.getMonth() + 1);
}
this._update();
},
_update: function() {
this._dateLabel.text = this.date.toLocaleFormat(this._headerFormat);
// Remove everything but the topBox and the weekday labels
let children = this.actor.get_children();
for (let i = this._firstDayIndex; i < children.length; i++)
children[i].destroy();
// Start at the beginning of the week before the start of the month
let iter = new Date(this.date);
iter.setDate(1);
iter.setSeconds(0);
iter.setHours(12);
iter.setTime(iter.getTime() - (iter.getDay() - this._weekStart) * MSECS_IN_DAY);
let now = new Date();
let row = 2;
while (true) {
let label = new St.Label({ text: iter.getDate().toString() });
if (_sameDay(now, iter))
label.style_class = "calendar-day calendar-today";
else if (iter.getMonth() != this.date.getMonth())
label.style_class = "calendar-day calendar-other-month-day";
else
label.style_class = "calendar-day";
this.actor.add(label,
{ row: row, col: (7 + iter.getDay() - this._weekStart) % 7,
x_fill: false, x_align: 1.0 });
iter.setTime(iter.getTime() + MSECS_IN_DAY);
if (iter.getDay() == this._weekStart) {
// We stop on the first "first day of the week" after the month we are displaying
if (iter.getMonth() > this.date.getMonth() || iter.getYear() > this.date.getYear())
break;
row++;
}
}
}
};