gnome-shell/js/ui/switcherPopup.js
Florian Müllner 033277b68f Define externally accessible contants with 'var' instead of 'const'
Just as we did with classes, define other constants that are (or
may be) used from other modules with 'var' to cut down on warnings.

https://bugzilla.gnome.org/show_bug.cgi?id=785084
2017-07-18 21:52:06 +02:00

620 lines
22 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
var POPUP_DELAY_TIMEOUT = 150; // milliseconds
var POPUP_SCROLL_TIME = 0.10; // seconds
var POPUP_FADE_OUT_TIME = 0.1; // seconds
var DISABLE_HOVER_TIMEOUT = 500; // milliseconds
function mod(a, b) {
return (a + b) % b;
}
function primaryModifier(mask) {
if (mask == 0)
return 0;
let primary = 1;
while (mask > 1) {
mask >>= 1;
primary <<= 1;
}
return primary;
}
var SwitcherPopup = new Lang.Class({
Name: 'SwitcherPopup',
Abstract: true,
_init: function(items) {
this._switcherList = null;
this._items = items || [];
this._selectedIndex = 0;
this.actor = new Shell.GenericContainer({ style_class: 'switcher-popup',
reactive: true,
visible: false });
this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this.actor.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this.actor.connect('allocate', Lang.bind(this, this._allocate));
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
Main.uiGroup.add_actor(this.actor);
this._haveModal = false;
this._modifierMask = 0;
this._motionTimeoutId = 0;
this._initialDelayTimeoutId = 0;
// Initially disable hover so we ignore the enter-event if
// the switcher appears underneath the current pointer location
this._disableHover();
},
_getPreferredWidth: function(actor, forHeight, alloc) {
let primary = Main.layoutManager.primaryMonitor;
alloc.min_size = primary.width;
alloc.natural_size = primary.width;
},
_getPreferredHeight: function(actor, forWidth, alloc) {
let primary = Main.layoutManager.primaryMonitor;
alloc.min_size = primary.height;
alloc.natural_size = primary.height;
},
_allocate: function(actor, box, flags) {
let childBox = new Clutter.ActorBox();
let primary = Main.layoutManager.primaryMonitor;
let leftPadding = this.actor.get_theme_node().get_padding(St.Side.LEFT);
let rightPadding = this.actor.get_theme_node().get_padding(St.Side.RIGHT);
let hPadding = leftPadding + rightPadding;
// Allocate the switcherList
// We select a size based on an icon size that does not overflow the screen
let [childMinHeight, childNaturalHeight] = this._switcherList.actor.get_preferred_height(primary.width - hPadding);
let [childMinWidth, childNaturalWidth] = this._switcherList.actor.get_preferred_width(childNaturalHeight);
childBox.x1 = Math.max(primary.x + leftPadding, primary.x + Math.floor((primary.width - childNaturalWidth) / 2));
childBox.x2 = Math.min(primary.x + primary.width - rightPadding, childBox.x1 + childNaturalWidth);
childBox.y1 = primary.y + Math.floor((primary.height - childNaturalHeight) / 2);
childBox.y2 = childBox.y1 + childNaturalHeight;
this._switcherList.actor.allocate(childBox, flags);
},
_initialSelection: function(backward, binding) {
if (backward)
this._select(this._items.length - 1);
else if (this._items.length == 1)
this._select(0);
else
this._select(1);
},
show: function(backward, binding, mask) {
if (this._items.length == 0)
return false;
if (!Main.pushModal(this.actor)) {
// Probably someone else has a pointer grab, try again with keyboard only
if (!Main.pushModal(this.actor, { options: Meta.ModalOptions.POINTER_ALREADY_GRABBED })) {
return false;
}
}
this._haveModal = true;
this._modifierMask = primaryModifier(mask);
this.actor.connect('key-press-event', Lang.bind(this, this._keyPressEvent));
this.actor.connect('key-release-event', Lang.bind(this, this._keyReleaseEvent));
this.actor.connect('button-press-event', Lang.bind(this, this._clickedOutside));
this.actor.connect('scroll-event', Lang.bind(this, this._scrollEvent));
this.actor.add_actor(this._switcherList.actor);
this._switcherList.connect('item-activated', Lang.bind(this, this._itemActivated));
this._switcherList.connect('item-entered', Lang.bind(this, this._itemEntered));
// Need to force an allocation so we can figure out whether we
// need to scroll when selecting
this.actor.opacity = 0;
this.actor.show();
this.actor.get_allocation_box();
this._initialSelection(backward, binding);
// There's a race condition; if the user released Alt before
// we got the grab, then we won't be notified. (See
// https://bugzilla.gnome.org/show_bug.cgi?id=596695 for
// details.) So we check now. (Have to do this after updating
// selection.)
let [x, y, mods] = global.get_pointer();
if (!(mods & this._modifierMask)) {
this._finish(global.get_current_time());
return false;
}
// We delay showing the popup so that fast Alt+Tab users aren't
// disturbed by the popup briefly flashing.
this._initialDelayTimeoutId = Mainloop.timeout_add(POPUP_DELAY_TIMEOUT,
Lang.bind(this, function () {
Main.osdWindowManager.hideAll();
this.actor.opacity = 255;
this._initialDelayTimeoutId = 0;
return GLib.SOURCE_REMOVE;
}));
GLib.Source.set_name_by_id(this._initialDelayTimeoutId, '[gnome-shell] Main.osdWindow.cancel');
return true;
},
_next: function() {
return mod(this._selectedIndex + 1, this._items.length);
},
_previous: function() {
return mod(this._selectedIndex - 1, this._items.length);
},
_keyPressHandler: function(keysym, action) {
throw new Error('Not implemented');
},
_keyPressEvent: function(actor, event) {
let keysym = event.get_key_symbol();
let action = global.display.get_keybinding_action(event.get_key_code(), event.get_state());
this._disableHover();
if (this._keyPressHandler(keysym, action) != Clutter.EVENT_PROPAGATE)
return Clutter.EVENT_STOP;
if (keysym == Clutter.Escape)
this.destroy();
return Clutter.EVENT_STOP;
},
_keyReleaseEvent: function(actor, event) {
let [x, y, mods] = global.get_pointer();
let state = mods & this._modifierMask;
if (state == 0)
this._finish(event.get_time());
return Clutter.EVENT_STOP;
},
_clickedOutside: function(actor, event) {
this.destroy();
return Clutter.EVENT_PROPAGATE;
},
_scrollHandler: function(direction) {
if (direction == Clutter.ScrollDirection.UP)
this._select(this._previous());
else if (direction == Clutter.ScrollDirection.DOWN)
this._select(this._next());
},
_scrollEvent: function(actor, event) {
this._scrollHandler(event.get_scroll_direction());
return Clutter.EVENT_PROPAGATE;
},
_itemActivatedHandler: function(n) {
this._select(n);
},
_itemActivated: function(switcher, n) {
this._itemActivatedHandler(n);
this._finish(global.get_current_time());
},
_itemEnteredHandler: function(n) {
this._select(n);
},
_itemEntered: function(switcher, n) {
if (!this.mouseActive)
return;
this._itemEnteredHandler(n);
},
_disableHover: function() {
this.mouseActive = false;
if (this._motionTimeoutId != 0)
Mainloop.source_remove(this._motionTimeoutId);
this._motionTimeoutId = Mainloop.timeout_add(DISABLE_HOVER_TIMEOUT, Lang.bind(this, this._mouseTimedOut));
GLib.Source.set_name_by_id(this._motionTimeoutId, '[gnome-shell] this._mouseTimedOut');
},
_mouseTimedOut: function() {
this._motionTimeoutId = 0;
this.mouseActive = true;
return GLib.SOURCE_REMOVE;
},
_popModal: function() {
if (this._haveModal) {
Main.popModal(this.actor);
this._haveModal = false;
}
},
destroy: function() {
this._popModal();
if (this.actor.visible) {
Tweener.addTween(this.actor,
{ opacity: 0,
time: POPUP_FADE_OUT_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this.actor.destroy();
})
});
} else
this.actor.destroy();
},
_finish: function(timestamp) {
this.destroy();
},
_onDestroy: function() {
this._popModal();
if (this._motionTimeoutId != 0)
Mainloop.source_remove(this._motionTimeoutId);
if (this._initialDelayTimeoutId != 0)
Mainloop.source_remove(this._initialDelayTimeoutId);
},
_select: function(num) {
this._selectedIndex = num;
this._switcherList.highlight(num);
}
});
var SwitcherList = new Lang.Class({
Name: 'SwitcherList',
_init : function(squareItems) {
this.actor = new Shell.GenericContainer({ style_class: 'switcher-list' });
this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this.actor.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this.actor.connect('allocate', Lang.bind(this, this._allocateTop));
// Here we use a GenericContainer so that we can force all the
// children to have the same width.
this._list = new Shell.GenericContainer({ style_class: 'switcher-list-item-container' });
this._list.spacing = 0;
this._list.connect('style-changed', Lang.bind(this, function() {
this._list.spacing = this._list.get_theme_node().get_length('spacing');
}));
this._list.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this._list.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this._list.connect('allocate', Lang.bind(this, this._allocate));
this._scrollView = new St.ScrollView({ style_class: 'hfade',
enable_mouse_scrolling: false });
this._scrollView.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.NEVER);
let scrollBox = new St.BoxLayout();
scrollBox.add_actor(this._list);
this._scrollView.add_actor(scrollBox);
this.actor.add_actor(this._scrollView);
// Those arrows indicate whether scrolling in one direction is possible
this._leftArrow = new St.DrawingArea({ style_class: 'switcher-arrow',
pseudo_class: 'highlighted' });
this._leftArrow.connect('repaint', Lang.bind(this,
function() { drawArrow(this._leftArrow, St.Side.LEFT); }));
this._rightArrow = new St.DrawingArea({ style_class: 'switcher-arrow',
pseudo_class: 'highlighted' });
this._rightArrow.connect('repaint', Lang.bind(this,
function() { drawArrow(this._rightArrow, St.Side.RIGHT); }));
this.actor.add_actor(this._leftArrow);
this.actor.add_actor(this._rightArrow);
this._items = [];
this._highlighted = -1;
this._squareItems = squareItems;
this._minSize = 0;
this._scrollableRight = true;
this._scrollableLeft = false;
},
_allocateTop: function(actor, box, flags) {
let leftPadding = this.actor.get_theme_node().get_padding(St.Side.LEFT);
let rightPadding = this.actor.get_theme_node().get_padding(St.Side.RIGHT);
let childBox = new Clutter.ActorBox();
let scrollable = this._minSize > box.x2 - box.x1;
box.y1 -= this.actor.get_theme_node().get_padding(St.Side.TOP);
box.y2 += this.actor.get_theme_node().get_padding(St.Side.BOTTOM);
this._scrollView.allocate(box, flags);
let arrowWidth = Math.floor(leftPadding / 3);
let arrowHeight = arrowWidth * 2;
childBox.x1 = leftPadding / 2;
childBox.y1 = this.actor.height / 2 - arrowWidth;
childBox.x2 = childBox.x1 + arrowWidth;
childBox.y2 = childBox.y1 + arrowHeight;
this._leftArrow.allocate(childBox, flags);
this._leftArrow.opacity = (this._scrollableLeft && scrollable) ? 255 : 0;
arrowWidth = Math.floor(rightPadding / 3);
arrowHeight = arrowWidth * 2;
childBox.x1 = this.actor.width - arrowWidth - rightPadding / 2;
childBox.y1 = this.actor.height / 2 - arrowWidth;
childBox.x2 = childBox.x1 + arrowWidth;
childBox.y2 = childBox.y1 + arrowHeight;
this._rightArrow.allocate(childBox, flags);
this._rightArrow.opacity = (this._scrollableRight && scrollable) ? 255 : 0;
},
addItem : function(item, label) {
let bbox = new St.Button({ style_class: 'item-box',
reactive: true });
bbox.set_child(item);
this._list.add_actor(bbox);
let n = this._items.length;
bbox.connect('clicked', Lang.bind(this, function() { this._onItemClicked(n); }));
bbox.connect('motion-event', Lang.bind(this, function() { return this._onItemEnter(n); }));
bbox.label_actor = label;
this._items.push(bbox);
return bbox;
},
_onItemClicked: function (index) {
this._itemActivated(index);
},
_onItemEnter: function (index) {
// Avoid reentrancy
if (index != this._currentItemEntered) {
this._currentItemEntered = index;
this._itemEntered(index);
}
return Clutter.EVENT_PROPAGATE;
},
highlight: function(index, justOutline) {
if (this._highlighted != -1) {
this._items[this._highlighted].remove_style_pseudo_class('outlined');
this._items[this._highlighted].remove_style_pseudo_class('selected');
}
this._highlighted = index;
if (this._highlighted != -1) {
if (justOutline)
this._items[this._highlighted].add_style_pseudo_class('outlined');
else
this._items[this._highlighted].add_style_pseudo_class('selected');
}
let adjustment = this._scrollView.hscroll.adjustment;
let [value, lower, upper, stepIncrement, pageIncrement, pageSize] = adjustment.get_values();
let [absItemX, absItemY] = this._items[index].get_transformed_position();
let [result, posX, posY] = this.actor.transform_stage_point(absItemX, 0);
let [containerWidth, containerHeight] = this.actor.get_transformed_size();
if (posX + this._items[index].get_width() > containerWidth)
this._scrollToRight();
else if (this._items[index].allocation.x1 - value < 0)
this._scrollToLeft();
},
_scrollToLeft : function() {
let adjustment = this._scrollView.hscroll.adjustment;
let [value, lower, upper, stepIncrement, pageIncrement, pageSize] = adjustment.get_values();
let item = this._items[this._highlighted];
if (item.allocation.x1 < value)
value = Math.min(0, item.allocation.x1);
else if (item.allocation.x2 > value + pageSize)
value = Math.max(upper, item.allocation.x2 - pageSize);
this._scrollableRight = true;
Tweener.addTween(adjustment,
{ value: value,
time: POPUP_SCROLL_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function () {
if (this._highlighted == 0)
this._scrollableLeft = false;
this.actor.queue_relayout();
})
});
},
_scrollToRight : function() {
let adjustment = this._scrollView.hscroll.adjustment;
let [value, lower, upper, stepIncrement, pageIncrement, pageSize] = adjustment.get_values();
let item = this._items[this._highlighted];
if (item.allocation.x1 < value)
value = Math.max(0, item.allocation.x1);
else if (item.allocation.x2 > value + pageSize)
value = Math.min(upper, item.allocation.x2 - pageSize);
this._scrollableLeft = true;
Tweener.addTween(adjustment,
{ value: value,
time: POPUP_SCROLL_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this, function () {
if (this._highlighted == this._items.length - 1)
this._scrollableRight = false;
this.actor.queue_relayout();
})
});
},
_itemActivated: function(n) {
this.emit('item-activated', n);
},
_itemEntered: function(n) {
this.emit('item-entered', n);
},
_maxChildWidth: function (forHeight) {
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < this._items.length; i++) {
let [childMin, childNat] = this._items[i].get_preferred_width(forHeight);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
if (this._squareItems) {
let [childMin, childNat] = this._items[i].get_preferred_height(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
}
return [maxChildMin, maxChildNat];
},
_getPreferredWidth: function (actor, forHeight, alloc) {
let [maxChildMin, maxChildNat] = this._maxChildWidth(forHeight);
let totalSpacing = Math.max(this._list.spacing * (this._items.length - 1), 0);
alloc.min_size = this._items.length * maxChildMin + totalSpacing;
alloc.natural_size = alloc.min_size;
this._minSize = alloc.min_size;
},
_getPreferredHeight: function (actor, forWidth, alloc) {
let maxChildMin = 0;
let maxChildNat = 0;
for (let i = 0; i < this._items.length; i++) {
let [childMin, childNat] = this._items[i].get_preferred_height(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = Math.max(childNat, maxChildNat);
}
if (this._squareItems) {
let [childMin, childNat] = this._maxChildWidth(-1);
maxChildMin = Math.max(childMin, maxChildMin);
maxChildNat = maxChildMin;
}
alloc.min_size = maxChildMin;
alloc.natural_size = maxChildNat;
},
_allocate: function (actor, box, flags) {
let childHeight = box.y2 - box.y1;
let [maxChildMin, maxChildNat] = this._maxChildWidth(childHeight);
let totalSpacing = Math.max(this._list.spacing * (this._items.length - 1), 0);
let childWidth = Math.floor(Math.max(0, box.x2 - box.x1 - totalSpacing) / this._items.length);
let x = 0;
let children = this._list.get_children();
let childBox = new Clutter.ActorBox();
let primary = Main.layoutManager.primaryMonitor;
let parentRightPadding = this.actor.get_parent().get_theme_node().get_padding(St.Side.RIGHT);
for (let i = 0; i < children.length; i++) {
if (this._items.indexOf(children[i]) != -1) {
let [childMin, childNat] = children[i].get_preferred_height(childWidth);
let vSpacing = (childHeight - childNat) / 2;
childBox.x1 = x;
childBox.y1 = vSpacing;
childBox.x2 = x + childWidth;
childBox.y2 = childBox.y1 + childNat;
children[i].allocate(childBox, flags);
x += this._list.spacing + childWidth;
} else {
// Something else, eg, AppSwitcher's arrows;
// we don't allocate it.
}
}
}
});
Signals.addSignalMethods(SwitcherList.prototype);
function drawArrow(area, side) {
let themeNode = area.get_theme_node();
let borderColor = themeNode.get_border_color(side);
let bodyColor = themeNode.get_foreground_color();
let [width, height] = area.get_surface_size ();
let cr = area.get_context();
cr.setLineWidth(1.0);
Clutter.cairo_set_source_color(cr, borderColor);
switch (side) {
case St.Side.TOP:
cr.moveTo(0, height);
cr.lineTo(Math.floor(width * 0.5), 0);
cr.lineTo(width, height);
break;
case St.Side.BOTTOM:
cr.moveTo(width, 0);
cr.lineTo(Math.floor(width * 0.5), height);
cr.lineTo(0, 0);
break;
case St.Side.LEFT:
cr.moveTo(width, height);
cr.lineTo(0, Math.floor(height * 0.5));
cr.lineTo(width, 0);
break;
case St.Side.RIGHT:
cr.moveTo(0, 0);
cr.lineTo(width, Math.floor(height * 0.5));
cr.lineTo(0, height);
break;
}
cr.strokePreserve();
Clutter.cairo_set_source_color(cr, bodyColor);
cr.fill();
cr.$dispose();
}