gnome-shell/js/ui/workspaces.js
2008-12-22 22:06:47 +00:00

748 lines
30 KiB
JavaScript

/* -*- mode: js2; js2-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil -*- */
const Tweener = imports.tweener.tweener;
const Clutter = imports.gi.Clutter;
const Pango = imports.gi.Pango;
const Lang = imports.lang;
const Main = imports.ui.main;
const Overlay = imports.ui.overlay;
const Panel = imports.ui.panel;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Big = imports.gi.Big;
const GdkPixbuf = imports.gi.GdkPixbuf;
// Windows are slightly translucent in the overlay mode
const WINDOW_OPACITY = 0.9 * 255;
const WINDOWCLONE_BG_COLOR = new Clutter.Color();
WINDOWCLONE_BG_COLOR.from_pixel(0x000000f0);
const WINDOWCLONE_TITLE_COLOR = new Clutter.Color();
WINDOWCLONE_TITLE_COLOR.from_pixel(0xffffffff);
// Define a layout scheme for small window counts. For larger
// counts we fall back to an algorithm. We need more schemes here
// unless we have a really good algorithm.
// Each triplet is [xCenter, yCenter, scale] where the scale
// is relative to the width of the workspace.
const POSITIONS = {
1: [[0.5, 0.5, 0.8]],
2: [[0.25, 0.5, 0.4], [0.75, 0.5, 0.4]],
3: [[0.25, 0.25, 0.33], [0.75, 0.25, 0.33], [0.5, 0.75, 0.33]],
4: [[0.25, 0.25, 0.33], [0.75, 0.25, 0.33], [0.75, 0.75, 0.33], [0.25, 0.75, 0.33]],
5: [[0.165, 0.25, 0.28], [0.495, 0.25, 0.28], [0.825, 0.25, 0.28], [0.25, 0.75, 0.4], [0.75, 0.75, 0.4]]
};
// Spacing between workspaces. At the moment, the same spacing is used
// in both zoomed-in and zoomed-out views; this is slightly
// metaphor-breaking, but the alternatives are also weird.
const GRID_SPACING = 15;
function Workspace(workspaceNum) {
this._init(workspaceNum);
}
Workspace.prototype = {
_init : function(workspaceNum) {
let me = this;
let global = Shell.Global.get();
this._workspaceNum = workspaceNum;
this.actor = new Clutter.Group();
let windows = global.get_windows().filter(this._isMyWindow, this);
// Find the desktop window
for (let i = 0; i < windows.length; i++) {
if (windows[i].get_window_type() == Meta.WindowType.DESKTOP) {
this._desktop = this._makeClone(windows[i]);
break;
}
}
// If there wasn't one, fake it
if (!this._desktop)
this._desktop = this._makeDesktopRectangle();
let metaWorkspace = global.screen.get_workspace_by_index(workspaceNum);
this._desktop.connect('button-press-event',
function(actor, event) {
metaWorkspace.activate(event.get_time());
Main.hide_overlay();
});
this.actor.add_actor(this._desktop);
// Create clones for remaining windows that should be
// visible in the overlay
this._windows = [this._desktop];
for (let i = 0; i < windows.length; i++) {
if (this._isOverlayWindow(windows[i])) {
let clone = this._makeClone(windows[i]);
clone.connect("button-press-event",
function(clone, event) {
clone.raise_top();
me._activateWindow(clone.realWindow, event.get_time());
});
this.actor.add_actor(clone);
this._windows.push(clone);
}
}
this._removeButton = null;
this._visible = false;
},
// Checks if the workspace is empty (ie, contains only a desktop window)
isEmpty : function() {
return this._windows.length == 1;
},
// Change Workspace's removability.
setRemovable : function(removable, buttonSize) {
let global = Shell.Global.get();
if (removable) {
if (this._removeButton)
return;
this._removeButton = new Clutter.Texture({ width: buttonSize,
height: buttonSize,
reactive: true
});
this._removeButton.set_from_file(global.imagedir + "remove-workspace.svg");
this._removeButton.connect('button-press-event', Lang.bind(this, this._removeSelf));
this.actor.add_actor(this._removeButton);
if (this._visible) {
this._removeButton.set_position(
this.gridX + (this._desktop.width * this.scale - this._removeButton.width) / 2,
this.gridY + (this._desktop.height * this.scale - this._removeButton.height) / 2);
this._removeButton.set_opacity(0);
Tweener.addTween(this._removeButton,
{ opacity: 255,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
} else {
if (!this._removeButton)
return;
if (this._visible) {
Tweener.addTween(this._removeButton,
{ opacity: 0,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad",
onComplete: this._removeRemoveButton,
onCompleteScope: this
});
} else {
this._removeButton.destroy();
this._removeButton = null;
}
}
},
_removeRemoveButton : function() {
this._removeButton.destroy();
this._removeButton = null;
},
// Animate the full-screen to overlay transition.
zoomToOverlay : function() {
let global = Shell.Global.get();
// Move the desktop into size/position
this._desktop.set_position(this.fullSizeX, this.fullSizeY);
Tweener.addTween(this._desktop,
{ x: this.gridX,
y: this.gridY,
scale_x: this.scale,
scale_y: this.scale,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
// Likewise for each of the windows in the workspace. This
// would be easier if we just positioned and scaled the entire
// workspace group rather than going each window individually,
// but if we do that then the windows of the active workspace
// will trace out a curved path as they move into place, which
// looks odd. Positioning everything independently lets us
// move them in a straight line to their final destination.
for (let i = 1; i < this._windows.length; i++) {
let window = this._windows[i];
let [xCenter, yCenter, fraction] = this._computeWindowPosition(i);
xCenter = this.gridX + this.scale * (xCenter * global.screen_width);
yCenter = this.gridY + this.scale * (yCenter * global.screen_height);
let size = Math.max(window.width, window.height);
let desiredSize = global.screen_width * fraction;
let scale = Math.min(desiredSize / size, 1.0) * this.scale;
window.set_position(this.fullSizeX + window.origX, this.fullSizeY + window.origY);
Tweener.addTween(window,
{ x: xCenter - 0.5 * scale * window.width,
y: yCenter - 0.5 * scale * window.height,
scale_x: scale,
scale_y: scale,
time: Overlay.ANIMATION_TIME,
opacity: WINDOW_OPACITY,
transition: "easeOutQuad",
onComplete: function () {
this._addCloneTitle(window);
},
onCompleteScope: this
});
}
// If the workspace is removable, animate in its removeButton
if (this._removeButton) {
this._removeButton.set_position(
this.fullSizeX + (this._desktop.width - this._removeButton.width) / 2,
this.fullSizeY + (this._desktop.height - this._removeButton.height) / 2);
this._removeButton.set_opacity(0);
Tweener.addTween(this._removeButton,
{ x: this.gridX + (this._desktop.width * this.scale - this._removeButton.width) / 2,
y: this.gridY + (this._desktop.height * this.scale - this._removeButton.height) / 2,
opacity: 255,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
this._visible = true;
},
// Animates the return from overlay mode
zoomFromOverlay : function() {
for (let i = 0; i < this._windows.length; i++) {
let window = this._windows[i];
if (window.cloneTitle)
window.cloneTitle.destroy();
Tweener.addTween(window,
{ x: this.fullSizeX + window.origX,
y: this.fullSizeY + window.origY,
scale_x: 1.0,
scale_y: 1.0,
time: Overlay.ANIMATION_TIME,
opacity: 255,
transition: "easeOutQuad"
});
}
if (this._removeButton) {
Tweener.addTween(this._removeButton,
{ x: this.fullSizeX + (this._desktop.width - this._removeButton.width) / 2,
y: this.fullSizeY + (this._desktop.height - this._removeButton.height) / 2,
opacity: 0,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
this._visible = false;
},
// Animates grid shrinking/expanding when a row or column
// of workspaces is added or removed
resizeToGrid : function (oldScale) {
let rescale = this.scale / oldScale;
for (let i = 0; i < this._windows.length; i++) {
let newX = this.gridX + (this._windows[i].x - this._desktop.x) * rescale;
let newY = this.gridY + (this._windows[i].y - this._desktop.y) * rescale;
let newWindowScale = this._windows[i].scale_x * rescale;
Tweener.addTween(this._windows[i],
{ x: newX,
y: newY,
scale_x: newWindowScale,
scale_y: newWindowScale,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
this._adjustCloneTitle(this._windows[i], newX, newY,
newWindowScale);
}
if (this._removeButton) {
// This gets layered on top of any already-running fade-out
// animation from setRemovable
Tweener.addTween(this._removeButton,
{ x: this.gridX + (this._desktop.width * this.scale - this._removeButton.width) / 2,
y: this.gridY + (this._desktop.height * this.scale - this._removeButton.height) / 2,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
},
// Animates the addition of a new (empty) workspace
slideIn : function(oldScale) {
let global = Shell.Global.get();
if (this.gridCol > this.gridRow) {
this._desktop.set_position(global.screen_width, this.gridY);
this._desktop.set_scale(oldScale, oldScale);
} else {
this._desktop.set_position(this.gridX, global.screen_height);
this._desktop.set_scale(this.scale, this.scale);
}
Tweener.addTween(this._desktop,
{ x: this.gridX,
y: this.gridY,
scale_x: this.scale,
scale_y: this.scale,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
if (this._removeButton) {
this._removeButton.set_position(
this._desktop.x + (this._desktop.width * oldScale - this._removeButton.width) / 2,
this._desktop.y + (this._desktop.height * oldScale - this._removeButton.height) / 2);
this._removeButton.set_opacity(0);
Tweener.addTween(this._removeButton,
{ x: this.gridX + (this._desktop.width * this.scale - this._removeButton.width) / 2,
y: this.gridY + (this._desktop.height * this.scale - this._removeButton.height) / 2,
opacity: 255,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
this._visible = true;
},
// Animates the removal of a workspace
slideOut : function(onComplete) {
let global = Shell.Global.get();
let destX = this._desktop.x, destY = this._desktop.y;
if (this.gridCol > this.gridRow)
destX = global.screen_width;
else
destY = global.screen_height;
Tweener.addTween(this._desktop,
{ x: destX,
y: destY,
scale_x: this.scale,
scale_y: this.scale,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad",
onComplete: onComplete
});
if (this._removeButton) {
// This gets layered on top of any already-running fade-out
// animation from setRemovable()
Tweener.addTween(this._removeButton,
{ x: destX + (this._desktop.width * this.scale - this._removeButton.width) / 2,
y: destY + (this._desktop.height * this.scale - this._removeButton.height) / 2,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
}
this._visible = false;
},
destroy : function() {
this.actor.destroy();
this.actor = null;
},
// Tests if @win belongs to this workspaces
_isMyWindow : function (win) {
return win.get_workspace() == this._workspaceNum ||
(win.get_meta_window() && win.get_meta_window().is_on_all_workspaces());
},
// Tests if @win should be shown in the overlay
_isOverlayWindow : function (win) {
return win.get_window_type() != Meta.WindowType.DESKTOP &&
!win.is_override_redirect();
},
// Create a clone of a window to use in the overlay.
_makeClone : function(window) {
let clone = new Clutter.CloneTexture({ parent_texture: window.get_texture(),
reactive: true,
x: window.x,
y: window.y });
clone.realWindow = window;
clone.origX = window.x;
clone.origY = window.y;
return clone;
},
// Create a texture for the desktop background, used in the case
// where there is no desktop window
_makeDesktopRectangle : function() {
let global = Shell.Global.get();
// In the case when we have a desktop window from the file
// manager, its height is full-screen, i.e. it includes the
// height of the panel, so we should not subtract the height
// of the panel from global.screen_height here either to have
// them show up identically.
let desktop = new Clutter.Rectangle({ color: global.stage.color,
reactive: true,
x: 0,
y: 0,
width: global.screen_width,
height: global.screen_height });
desktop.origX = desktop.origY = 0;
return desktop;
},
_computeWindowPosition : function(index) {
// ignore this._windows[0], which is the desktop
let windowIndex = index - 1;
let numberOfWindows = this._windows.length - 1;
if (numberOfWindows in POSITIONS)
return POSITIONS[numberOfWindows][windowIndex];
// If we don't have a predefined scheme for this window count,
// overlap the windows along the diagonal of the workspace
// (improve this!)
let fraction = Math.sqrt(1/numberOfWindows);
// The top window goes at the lower right - this is different from the
// fixed position schemes where the windows are in "reading order"
// and the top window goes at the upper left.
let pos = (numberOfWindows - windowIndex - 1) / (numberOfWindows - 1);
let xCenter = (fraction / 2) + (1 - fraction) * pos;
let yCenter = xCenter;
return [xCenter, yCenter, fraction];
},
_addCloneTitle : function (clone) {
let transformed = clone.get_transformed_size();
let window = clone.realWindow;
let icon = window.meta_window.mini_icon;
let iconTexture = new Clutter.Texture({ width: 16, height: 16, keep_aspect_ratio: true});
Shell.clutter_texture_set_from_pixbuf(iconTexture, icon);
let box = new Big.Box({background_color : WINDOWCLONE_BG_COLOR,
y_align: Big.BoxAlignment.CENTER,
corner_radius: 5,
padding: 4,
spacing: 4,
orientation: Big.BoxOrientation.HORIZONTAL});
box.append(iconTexture, Big.BoxPackFlags.NONE);
let title = new Clutter.Label({color: WINDOWCLONE_TITLE_COLOR,
font_name: "Sans 14",
text: window.meta_window.title,
ellipsize: Pango.EllipsizeMode.END});
// Get current width (just the icon), with spacing, plus title
box.fullWidth = box.width + box.spacing + title.width;
box.width = Math.min(box.fullWidth, transformed[0]);
box.append(title, Big.BoxPackFlags.EXPAND);
box.set_position(clone.x, clone.y);
let parent = clone.get_parent();
clone.cloneTitle = box;
parent.add_actor(box);
},
_adjustCloneTitle : function (clone, newX, newY, newScale) {
let title = clone.cloneTitle;
if (!title)
return;
let newWidth = Math.min(title.fullWidth, clone.width * newScale);
Tweener.addTween(title,
{ x: newX,
y: newY,
width: newWidth,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
},
_activateWindow : function(w, time) {
let global = Shell.Global.get();
let activeWorkspace = global.screen.get_active_workspace_index();
let windowWorkspace = w.get_workspace();
if (windowWorkspace != activeWorkspace) {
let workspace = global.screen.get_workspace_by_index(windowWorkspace);
workspace.activate_with_focus(w.get_meta_window(), time);
} else
w.get_meta_window().activate(time);
Main.hide_overlay();
},
_removeSelf : function(actor, event) {
let global = Shell.Global.get();
let screen = global.screen;
let workspace = screen.get_workspace_by_index(this._workspaceNum);
screen.remove_workspace(workspace, event.get_time());
}
};
function Workspaces() {
this._init();
}
Workspaces.prototype = {
_init : function() {
let me = this;
let global = Shell.Global.get();
this.actor = new Clutter.Group();
let screenWidth = global.screen_width;
let screenHeight = global.screen_height;
this._width = screenWidth * Overlay.WORKSPACE_GRID_SCALE;
this._height = screenHeight * Overlay.WORKSPACE_GRID_SCALE;
this._x = screenWidth - this._width - Overlay.WORKSPACE_GRID_PADDING;
this._y = Panel.PANEL_HEIGHT + (screenHeight - this._height - Panel.PANEL_HEIGHT) / 2;
this._workspaces = [];
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
let activeWorkspace;
// Create and position workspace objects
for (let w = 0; w < global.screen.n_workspaces; w++) {
this._workspaces[w] = new Workspace(w);
if (w == activeWorkspaceIndex)
activeWorkspace = this._workspaces[w];
this.actor.add_actor(this._workspaces[w].actor);
}
activeWorkspace.actor.raise_top();
this._positionWorkspaces(global, activeWorkspace);
// Create a backdrop rectangle, so that you don't see the
// other parts of the overlay (eg, sidebar) through the gaps
// between the workspaces when they're zooming in/out
this._backdrop = new Clutter.Rectangle({ color: Overlay.OVERLAY_BACKGROUND_COLOR,
x: this._backdropX,
y: this._backdropY,
width: this._backdropWidth,
height: this._backdropHeight
});
this.actor.add_actor(this._backdrop);
this._backdrop.lower_bottom();
Tweener.addTween(this._backdrop,
{ x: this._x,
y: this._y,
width: this._width,
height: this._height,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
// Create (+) and (-) buttons
let bottomHeight = screenHeight - this._height - this._y;
this._buttonSize = Math.floor(bottomHeight * 3/5);
let plusX = this._x + this._width - this._buttonSize;
let plusY = screenHeight - Math.floor(bottomHeight * 4/5);
let plus = new Clutter.Texture({ x: plusX,
y: plusY,
width: this._buttonSize,
height: this._buttonSize,
reactive: true
});
plus.set_from_file(global.imagedir + "add-workspace.svg");
plus.connect('button-press-event', this._addWorkspace);
this.actor.add_actor(plus);
plus.lower_bottom();
let lastWorkspace = this._workspaces[this._workspaces.length - 1];
if (lastWorkspace.isEmpty())
lastWorkspace.setRemovable(true, this._buttonSize);
// Position/scale the desktop windows and their children
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomToOverlay();
// Track changes to the number of workspaces
this._nWorkspacesNotifyId =
global.screen.connect('notify::n-workspaces',
function() {
me._workspacesChanged();
});
},
hide : function() {
let global = Shell.Global.get();
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
let activeWorkspace = this._workspaces[activeWorkspaceIndex];
this._positionWorkspaces(global, activeWorkspace);
activeWorkspace.actor.raise_top();
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomFromOverlay();
Tweener.addTween(this._backdrop,
{ x: this._backdropX,
y: this._backdropY,
width: this._backdropWidth,
height: this._backdropHeight,
time: Overlay.ANIMATION_TIME,
transition: "easeOutQuad"
});
},
destroy : function() {
let global = Shell.Global.get();
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].destroy();
this._workspaces = [];
this.actor.destroy();
this.actor = null;
this._backdrop = null;
global.screen.disconnect(this._nWorkspacesNotifyId);
},
// Assign grid positions to workspaces. We can't just do a simple
// row-major or column-major numbering, because we don't want the
// existing workspaces to get rearranged when we add a row or
// column. So we alternate between adding to rows and adding to
// columns. (So, eg, when going from a 2x2 grid of 4 workspaces to
// a 3x2 grid of 5 workspaces, the 4 existing workspaces stay
// where they are, and the 5th one is added to the end of the
// first row.)
//
// FIXME: need to make the metacity internal layout agree with this!
_positionWorkspaces : function(global, activeWorkspace) {
if (!activeWorkspace) {
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
activeWorkspace = this._workspaces[activeWorkspaceIndex];
}
let gridWidth = Math.ceil(Math.sqrt(this._workspaces.length));
let gridHeight = Math.ceil(this._workspaces.length / gridWidth);
let wsWidth = (this._width - (gridWidth - 1) * GRID_SPACING) / gridWidth;
let wsHeight = (this._height - (gridHeight - 1) * GRID_SPACING) / gridHeight;
let scale = wsWidth / global.screen_width;
let span = 1, n = 0, row = 0, col = 0, horiz = true;
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
workspace.gridRow = row;
workspace.gridCol = col;
workspace.gridX = this._x + workspace.gridCol * (wsWidth + GRID_SPACING);
workspace.gridY = this._y + workspace.gridRow * (wsHeight + GRID_SPACING);
workspace.scale = scale;
if (horiz) {
col++;
if (col == span) {
row = 0;
horiz = false;
}
} else {
row++;
if (row == span) {
col = 0;
horiz = true;
span++;
}
}
}
// Now figure out their full-size coordinates
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
workspace.fullSizeX = (workspace.gridCol - activeWorkspace.gridCol) * (global.screen_width + GRID_SPACING);
workspace.fullSizeY = (workspace.gridRow - activeWorkspace.gridRow) * (global.screen_height + GRID_SPACING);
}
// And the backdrop
this._backdropX = this._workspaces[0].fullSizeX;
this._backdropY = this._workspaces[0].fullSizeY;
this._backdropWidth = gridWidth * (global.screen_width + GRID_SPACING) - GRID_SPACING;
this._backdropHeight = gridHeight * (global.screen_height + GRID_SPACING) - GRID_SPACING;
},
_workspacesChanged : function() {
let global = Shell.Global.get();
let oldNumWorkspaces = this._workspaces.length;
let newNumWorkspaces = global.screen.n_workspaces;
if (oldNumWorkspaces == newNumWorkspaces)
return;
let oldScale = this._workspaces[0].scale;
let oldGridWidth = Math.ceil(Math.sqrt(oldNumWorkspaces));
let oldGridHeight = Math.ceil(oldNumWorkspaces / oldGridWidth);
let lostWorkspaces = [];
// The old last workspace is no longer removable.
this._workspaces[oldNumWorkspaces - 1].setRemovable(false);
if (newNumWorkspaces > oldNumWorkspaces) {
// Create new workspace groups
for (let w = oldNumWorkspaces; w < newNumWorkspaces; w++) {
this._workspaces[w] = new Workspace(w);
this.actor.add_actor(this._workspaces[w].actor);
}
} else {
// Truncate the list of workspaces
// FIXME: assumes that the workspaces are being removed from
// the end of the list, not the start/middle
lostWorkspaces = this._workspaces.splice(newNumWorkspaces);
}
// The new last workspace may be removable
let newLastWorkspace = this._workspaces[this._workspaces.length - 1];
if (newLastWorkspace.isEmpty())
newLastWorkspace.setRemovable(true, this._buttonSize);
// Figure out the new layout
this._positionWorkspaces(global);
let newScale = this._workspaces[0].scale;
let newGridWidth = Math.ceil(Math.sqrt(newNumWorkspaces));
let newGridHeight = Math.ceil(newNumWorkspaces / newGridWidth);
if (newGridWidth != oldGridWidth || newGridHeight != oldGridHeight) {
// We need to resize/move the existing workspaces/windows
let existingWorkspaces = Math.min(oldNumWorkspaces, newNumWorkspaces);
for (let w = 0; w < existingWorkspaces; w++)
this._workspaces[w].resizeToGrid(oldScale);
}
if (newNumWorkspaces > oldNumWorkspaces) {
// Slide new workspaces in from offscreen
for (let w = oldNumWorkspaces; w < newNumWorkspaces; w++)
this._workspaces[w].slideIn(oldScale);
} else {
// Slide old workspaces out
for (let w = 0; w < lostWorkspaces.length; w++) {
let workspace = lostWorkspaces[w];
workspace.slideOut(function () { workspace.destroy(); });
}
// FIXME: deal with windows on the lost workspaces
}
},
_addWorkspace : function(actor, event) {
let global = Shell.Global.get();
global.screen.append_new_workspace(false, event.get_time());
}
};