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gnome-shell/js/ui/ibusCandidatePopup.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

310 lines
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JavaScript
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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const IBus = imports.gi.IBus;
const Lang = imports.lang;
const Signals = imports.signals;
const St = imports.gi.St;
const BoxPointer = imports.ui.boxpointer;
const Main = imports.ui.main;
var MAX_CANDIDATES_PER_PAGE = 16;
var DEFAULT_INDEX_LABELS = [ '1', '2', '3', '4', '5', '6', '7', '8',
'9', '0', 'a', 'b', 'c', 'd', 'e', 'f' ];
var CandidateArea = new Lang.Class({
Name: 'CandidateArea',
_init: function() {
this.actor = new St.BoxLayout({ vertical: true,
reactive: true,
visible: false });
this._candidateBoxes = [];
for (let i = 0; i < MAX_CANDIDATES_PER_PAGE; ++i) {
let box = new St.BoxLayout({ style_class: 'candidate-box',
reactive: true,
track_hover: true });
box._indexLabel = new St.Label({ style_class: 'candidate-index' });
box._candidateLabel = new St.Label({ style_class: 'candidate-label' });
box.add(box._indexLabel, { y_fill: false });
box.add(box._candidateLabel, { y_fill: false });
this._candidateBoxes.push(box);
this.actor.add(box);
let j = i;
box.connect('button-release-event', Lang.bind(this, function(actor, event) {
this.emit('candidate-clicked', j, event.get_button(), event.get_state());
return Clutter.EVENT_PROPAGATE;
}));
}
this.actor.connect('scroll-event', Lang.bind(this, function(actor, event) {
let direction = event.get_scroll_direction();
switch(direction) {
case Clutter.ScrollDirection.UP:
this.emit('cursor-up');
break;
case Clutter.ScrollDirection.DOWN:
this.emit('cursor-down');
break;
};
return Clutter.EVENT_PROPAGATE;
}));
this._buttonBox = new St.BoxLayout({ style_class: 'candidate-page-button-box' });
this._previousButton = new St.Button({ style_class: 'candidate-page-button candidate-page-button-previous button' });
this._previousButton.child = new St.Icon({ style_class: 'candidate-page-button-icon' });
this._buttonBox.add(this._previousButton, { expand: true });
this._nextButton = new St.Button({ style_class: 'candidate-page-button candidate-page-button-next button' });
this._nextButton.child = new St.Icon({ style_class: 'candidate-page-button-icon' });
this._buttonBox.add(this._nextButton, { expand: true });
this.actor.add(this._buttonBox);
this._previousButton.connect('clicked', Lang.bind(this, function() {
this.emit('previous-page');
}));
this._nextButton.connect('clicked', Lang.bind(this, function() {
this.emit('next-page');
}));
this._orientation = -1;
this._cursorPosition = 0;
},
setOrientation: function(orientation) {
if (this._orientation == orientation)
return;
this._orientation = orientation;
if (this._orientation == IBus.Orientation.HORIZONTAL) {
this.actor.vertical = false;
this.actor.remove_style_class_name('vertical');
this.actor.add_style_class_name('horizontal');
this._previousButton.child.icon_name = 'go-previous-symbolic';
this._nextButton.child.icon_name = 'go-next-symbolic';
} else { // VERTICAL || SYSTEM
this.actor.vertical = true;
this.actor.add_style_class_name('vertical');
this.actor.remove_style_class_name('horizontal');
this._previousButton.child.icon_name = 'go-up-symbolic';
this._nextButton.child.icon_name = 'go-down-symbolic';
}
},
setCandidates: function(indexes, candidates, cursorPosition, cursorVisible) {
for (let i = 0; i < MAX_CANDIDATES_PER_PAGE; ++i) {
let visible = i < candidates.length;
let box = this._candidateBoxes[i];
box.visible = visible;
if (!visible)
continue;
box._indexLabel.text = ((indexes && indexes[i]) ? indexes[i] : DEFAULT_INDEX_LABELS[i]);
box._candidateLabel.text = candidates[i];
}
this._candidateBoxes[this._cursorPosition].remove_style_pseudo_class('selected');
this._cursorPosition = cursorPosition;
if (cursorVisible)
this._candidateBoxes[cursorPosition].add_style_pseudo_class('selected');
},
updateButtons: function(wrapsAround, page, nPages) {
if (nPages < 2) {
this._buttonBox.hide();
return;
}
this._buttonBox.show();
this._previousButton.reactive = wrapsAround || page > 0;
this._nextButton.reactive = wrapsAround || page < nPages - 1;
},
});
Signals.addSignalMethods(CandidateArea.prototype);
var CandidatePopup = new Lang.Class({
Name: 'CandidatePopup',
_init: function() {
this._boxPointer = new BoxPointer.BoxPointer(St.Side.TOP);
this._boxPointer.actor.visible = false;
this._boxPointer.actor.style_class = 'candidate-popup-boxpointer';
Main.layoutManager.addChrome(this._boxPointer.actor);
let box = new St.BoxLayout({ style_class: 'candidate-popup-content',
vertical: true });
this._boxPointer.bin.set_child(box);
this._preeditText = new St.Label({ style_class: 'candidate-popup-text',
visible: false });
box.add(this._preeditText);
this._auxText = new St.Label({ style_class: 'candidate-popup-text',
visible: false });
box.add(this._auxText);
this._candidateArea = new CandidateArea();
box.add(this._candidateArea.actor);
this._candidateArea.connect('previous-page', Lang.bind(this, function() {
this._panelService.page_up();
}));
this._candidateArea.connect('next-page', Lang.bind(this, function() {
this._panelService.page_down();
}));
this._candidateArea.connect('cursor-up', Lang.bind(this, function() {
this._panelService.cursor_up();
}));
this._candidateArea.connect('cursor-down', Lang.bind(this, function() {
this._panelService.cursor_down();
}));
this._candidateArea.connect('candidate-clicked', Lang.bind(this, function(ca, index, button, state) {
this._panelService.candidate_clicked(index, button, state);
}));
this._panelService = null;
},
setPanelService: function(panelService) {
this._panelService = panelService;
if (!panelService)
return;
panelService.connect('set-cursor-location',
Lang.bind(this, function(ps, x, y, w, h) {
this._setDummyCursorGeometry(x, y, w, h);
}));
try {
panelService.connect('set-cursor-location-relative',
Lang.bind(this, function(ps, x, y, w, h) {
if (!global.display.focus_window)
return;
let window = global.display.focus_window.get_compositor_private();
this._setDummyCursorGeometry(window.x + x, window.y + y, w, h);
}));
} catch(e) {
// Only recent IBus versions have support for this signal
// which is used for wayland clients. In order to work
// with older IBus versions we can silently ignore the
// signal's absence.
}
panelService.connect('update-preedit-text',
Lang.bind(this, function(ps, text, cursorPosition, visible) {
this._preeditText.visible = visible;
this._updateVisibility();
this._preeditText.text = text.get_text();
let attrs = text.get_attributes();
if (attrs)
this._setTextAttributes(this._preeditText.clutter_text,
attrs);
}));
panelService.connect('show-preedit-text',
Lang.bind(this, function(ps) {
this._preeditText.show();
this._updateVisibility();
}));
panelService.connect('hide-preedit-text',
Lang.bind(this, function(ps) {
this._preeditText.hide();
this._updateVisibility();
}));
panelService.connect('update-auxiliary-text',
Lang.bind(this, function(ps, text, visible) {
this._auxText.visible = visible;
this._updateVisibility();
this._auxText.text = text.get_text();
}));
panelService.connect('show-auxiliary-text',
Lang.bind(this, function(ps) {
this._auxText.show();
this._updateVisibility();
}));
panelService.connect('hide-auxiliary-text',
Lang.bind(this, function(ps) {
this._auxText.hide();
this._updateVisibility();
}));
panelService.connect('update-lookup-table',
Lang.bind(this, function(ps, lookupTable, visible) {
this._candidateArea.actor.visible = visible;
this._updateVisibility();
let nCandidates = lookupTable.get_number_of_candidates();
let cursorPos = lookupTable.get_cursor_pos();
let pageSize = lookupTable.get_page_size();
let nPages = Math.ceil(nCandidates / pageSize);
let page = ((cursorPos == 0) ? 0 : Math.floor(cursorPos / pageSize));
let startIndex = page * pageSize;
let endIndex = Math.min((page + 1) * pageSize, nCandidates);
let indexes = [];
let indexLabel;
for (let i = 0; indexLabel = lookupTable.get_label(i); ++i)
indexes.push(indexLabel.get_text());
let candidates = [];
for (let i = startIndex; i < endIndex; ++i)
candidates.push(lookupTable.get_candidate(i).get_text());
this._candidateArea.setCandidates(indexes,
candidates,
cursorPos % pageSize,
lookupTable.is_cursor_visible());
this._candidateArea.setOrientation(lookupTable.get_orientation());
this._candidateArea.updateButtons(lookupTable.is_round(), page, nPages);
}));
panelService.connect('show-lookup-table',
Lang.bind(this, function(ps) {
this._candidateArea.actor.show();
this._updateVisibility();
}));
panelService.connect('hide-lookup-table',
Lang.bind(this, function(ps) {
this._candidateArea.actor.hide();
this._updateVisibility();
}));
panelService.connect('focus-out',
Lang.bind(this, function(ps) {
this._boxPointer.hide(BoxPointer.PopupAnimation.NONE);
}));
},
_setDummyCursorGeometry: function(x, y, w, h) {
Main.layoutManager.setDummyCursorGeometry(x, y, w, h);
if (this._boxPointer.actor.visible)
this._boxPointer.setPosition(Main.layoutManager.dummyCursor, 0);
},
_updateVisibility: function() {
let isVisible = (this._preeditText.visible ||
this._auxText.visible ||
this._candidateArea.actor.visible);
if (isVisible) {
this._boxPointer.setPosition(Main.layoutManager.dummyCursor, 0);
this._boxPointer.show(BoxPointer.PopupAnimation.NONE);
this._boxPointer.actor.raise_top();
} else {
this._boxPointer.hide(BoxPointer.PopupAnimation.NONE);
}
},
_setTextAttributes: function(clutterText, ibusAttrList) {
let attr;
for (let i = 0; attr = ibusAttrList.get(i); ++i)
if (attr.get_attr_type() == IBus.AttrType.BACKGROUND)
clutterText.set_selection(attr.get_start_index(), attr.get_end_index());
}
});
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