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workspace: Move more things to LayoutStrategy subclass

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Only keep computeLayout, computeWindowSlots, computeScaleAndSpace and
the contructor in the superclass, the rest is actually layout specific
and won't apply anymore when we introduce the new vertical layout
strategy.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1617>
This commit is contained in:
Jonas Dreßler 2021-02-01 10:39:41 +01:00 committed by Marge Bot
parent c635ff490a
commit ac7dc62da6
1 changed files with 112 additions and 113 deletions
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225
js/ui/workspace.js
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@ -114,6 +114,38 @@ var LayoutStrategy = class {
this._columnSpacing = params.columnSpacing;
}
// Compute strategy-specific window slots for each window in
// @windows, given the @layout. The strategy may also use @layout
// as strategy-specific storage.
//
// This must calculate:
// * maxColumns - The maximum number of columns used by the layout.
// * gridWidth - The total width used by the grid, unscaled, unspaced.
// * gridHeight - The totial height used by the grid, unscaled, unspaced.
// * rows - A list of rows, which should be instantiated by _newRow.
computeLayout(_windows, _layout) {
throw new GObject.NotImplementedError(`computeLayout in ${this.constructor.name}`);
}
// Given @layout, compute the overall scale and space of the layout.
//
// This method does not return anything, but instead installs
// the properties "scale" and "space" on @layout directly.
//
// Make sure to call this methods before calling computeWindowSlots(),
// as it depends on the scale property installed in @layout here.
computeScaleAndSpace(_layout) {
throw new GObject.NotImplementedError(`computeScaleAndSpace in ${this.constructor.name}`);
}
// Returns an array with final position and size information for each
// window of the layout, given a bounding area that it will be inside of.
computeWindowSlots(_layout, _area) {
throw new GObject.NotImplementedError(`computeWindowSlots in ${this.constructor.name}`);
}
};
var UnalignedLayoutStrategy = class extends LayoutStrategy {
_newRow() {
// Row properties:
//
@ -150,37 +182,91 @@ var LayoutStrategy = class {
return _interpolate(1.5, 1, ratio);
}
// Compute the size of each row, by assigning to the properties
// row.width, row.height, row.fullWidth, row.fullHeight, and
// (optionally) for each row in @layout.rows. This method is
// intended to be called by subclasses.
_computeRowSizes(_layout) {
throw new GObject.NotImplementedError(`_computeRowSizes in ${this.constructor.name}`);
_computeRowSizes(layout) {
let { rows, scale } = layout;
for (let i = 0; i < rows.length; i++) {
let row = rows[i];
row.width = row.fullWidth * scale + (row.windows.length - 1) * this._columnSpacing;
row.height = row.fullHeight * scale;
}
}
// Compute strategy-specific window slots for each window in
// @windows, given the @layout. The strategy may also use @layout
// as strategy-specific storage.
//
// This must calculate:
// * maxColumns - The maximum number of columns used by the layout.
// * gridWidth - The total width used by the grid, unscaled, unspaced.
// * gridHeight - The totial height used by the grid, unscaled, unspaced.
// * rows - A list of rows, which should be instantiated by _newRow.
computeLayout(_windows, _layout) {
throw new GObject.NotImplementedError(`computeLayout in ${this.constructor.name}`);
_keepSameRow(row, window, width, idealRowWidth) {
if (row.fullWidth + width <= idealRowWidth)
return true;
let oldRatio = row.fullWidth / idealRowWidth;
let newRatio = (row.fullWidth + width) / idealRowWidth;
if (Math.abs(1 - newRatio) < Math.abs(1 - oldRatio))
return true;
return false;
}
// Given @layout, compute the overall scale and space of the layout.
// The scale is the individual, non-fancy scale of each window, and
// the space is the percentage of the available area eventually
// used by the layout.
_sortRow(row) {
// Sort windows horizontally to minimize travel distance.
// This affects in what order the windows end up in a row.
row.windows.sort((a, b) => a.windowCenter.x - b.windowCenter.x);
}
computeLayout(windows, layout) {
let numRows = layout.numRows;
let rows = [];
let totalWidth = 0;
for (let i = 0; i < windows.length; i++) {
let window = windows[i];
let s = this._computeWindowScale(window);
totalWidth += window.boundingBox.width * s;
}
let idealRowWidth = totalWidth / numRows;
// Sort windows vertically to minimize travel distance.
// This affects what rows the windows get placed in.
let sortedWindows = windows.slice();
sortedWindows.sort((a, b) => a.windowCenter.y - b.windowCenter.y);
let windowIdx = 0;
for (let i = 0; i < numRows; i++) {
let row = this._newRow();
rows.push(row);
for (; windowIdx < sortedWindows.length; windowIdx++) {
let window = sortedWindows[windowIdx];
let s = this._computeWindowScale(window);
let width = window.boundingBox.width * s;
let height = window.boundingBox.height * s;
row.fullHeight = Math.max(row.fullHeight, height);
// either new width is < idealWidth or new width is nearer from idealWidth then oldWidth
if (this._keepSameRow(row, window, width, idealRowWidth) || (i === numRows - 1)) {
row.windows.push(window);
row.fullWidth += width;
} else {
break;
}
}
}
let gridHeight = 0;
let maxRow;
for (let i = 0; i < numRows; i++) {
let row = rows[i];
this._sortRow(row);
if (!maxRow || row.fullWidth > maxRow.fullWidth)
maxRow = row;
gridHeight += row.fullHeight;
}
layout.rows = rows;
layout.maxColumns = maxRow.windows.length;
layout.gridWidth = maxRow.fullWidth;
layout.gridHeight = gridHeight;
}
// This method does not return anything, but instead installs
// the properties "scale" and "space" on @layout directly.
//
// Make sure to call this methods before calling computeWindowSlots(),
// as it depends on the scale property installed in @layout here.
computeScaleAndSpace(layout) {
let area = layout.area;
@ -282,93 +368,6 @@ var LayoutStrategy = class {
}
};
var UnalignedLayoutStrategy = class extends LayoutStrategy {
_computeRowSizes(layout) {
let { rows, scale } = layout;
for (let i = 0; i < rows.length; i++) {
let row = rows[i];
row.width = row.fullWidth * scale + (row.windows.length - 1) * this._columnSpacing;
row.height = row.fullHeight * scale;
}
}
_keepSameRow(row, window, width, idealRowWidth) {
if (row.fullWidth + width <= idealRowWidth)
return true;
let oldRatio = row.fullWidth / idealRowWidth;
let newRatio = (row.fullWidth + width) / idealRowWidth;
if (Math.abs(1 - newRatio) < Math.abs(1 - oldRatio))
return true;
return false;
}
_sortRow(row) {
// Sort windows horizontally to minimize travel distance.
// This affects in what order the windows end up in a row.
row.windows.sort((a, b) => a.windowCenter.x - b.windowCenter.x);
}
computeLayout(windows, layout) {
let numRows = layout.numRows;
let rows = [];
let totalWidth = 0;
for (let i = 0; i < windows.length; i++) {
let window = windows[i];
let s = this._computeWindowScale(window);
totalWidth += window.boundingBox.width * s;
}
let idealRowWidth = totalWidth / numRows;
// Sort windows vertically to minimize travel distance.
// This affects what rows the windows get placed in.
let sortedWindows = windows.slice();
sortedWindows.sort((a, b) => a.windowCenter.y - b.windowCenter.y);
let windowIdx = 0;
for (let i = 0; i < numRows; i++) {
let row = this._newRow();
rows.push(row);
for (; windowIdx < sortedWindows.length; windowIdx++) {
let window = sortedWindows[windowIdx];
let s = this._computeWindowScale(window);
let width = window.boundingBox.width * s;
let height = window.boundingBox.height * s;
row.fullHeight = Math.max(row.fullHeight, height);
// either new width is < idealWidth or new width is nearer from idealWidth then oldWidth
if (this._keepSameRow(row, window, width, idealRowWidth) || (i == numRows - 1)) {
row.windows.push(window);
row.fullWidth += width;
} else {
break;
}
}
}
let gridHeight = 0;
let maxRow;
for (let i = 0; i < numRows; i++) {
let row = rows[i];
this._sortRow(row);
if (!maxRow || row.fullWidth > maxRow.fullWidth)
maxRow = row;
gridHeight += row.fullHeight;
}
layout.rows = rows;
layout.maxColumns = maxRow.windows.length;
layout.gridWidth = maxRow.fullWidth;
layout.gridHeight = gridHeight;
}
};
function animateAllocation(actor, box) {
if (actor.allocation.equal(box) ||
actor.allocation.get_width() === 0 ||