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output: simplify layout code

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Isaac Freund 2020-07-06 23:56:54 +02:00
parent 56df9176b3
commit 05557086e6
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GPG Key ID: 86DED400DDFD7A11
1 changed files with 25 additions and 29 deletions
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54
river/Output.zig
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@ -166,7 +166,7 @@ pub fn sendViewTags(self: Self) void {
/// The single build in layout, which makes all views use the maximum available
/// space.
fn layoutFull(self: *Self, visible_count: u32, output_tags: u32) void {
fn layoutFull(self: *Self, visible_count: u32) void {
const border_width = self.root.server.config.border_width;
const view_padding = self.root.server.config.view_padding;
const outer_padding = self.root.server.config.outer_padding;
@ -179,7 +179,7 @@ fn layoutFull(self: *Self, visible_count: u32, output_tags: u32) void {
.height = self.usable_box.height - (2 * xy_offset),
};
var it = ViewStack(View).pendingIterator(self.views.first, output_tags);
var it = ViewStack(View).pendingIterator(self.views.first, self.pending.tags);
while (it.next()) |node| {
const view = &node.view;
if (!view.pending.float and !view.pending.fullscreen) {
@ -191,31 +191,28 @@ fn layoutFull(self: *Self, visible_count: u32, output_tags: u32) void {
const LayoutError = error{
BadExitCode,
BadWindowConfiguration,
ConfigurationMismatch,
WrongViewCount,
};
/// Parse a window configuration string and write values to the box
fn parseWindowConfig(buffer: []const u8) LayoutError!Box {
var i: u32 = 0;
var box: Box = undefined;
/// Parse 4 integers separated by spaces into a Box
fn parseBox(buffer: []const u8) !Box {
var it = std.mem.split(buffer, " ");
while (it.next()) |token| : (i += 1) {
switch (i) {
0 => box.x = std.fmt.parseInt(i32, token, 10) catch return LayoutError.BadWindowConfiguration,
1 => box.y = std.fmt.parseInt(i32, token, 10) catch return LayoutError.BadWindowConfiguration,
2 => box.width = std.fmt.parseInt(u32, token, 10) catch return LayoutError.BadWindowConfiguration,
3 => box.height = std.fmt.parseInt(u32, token, 10) catch return LayoutError.BadWindowConfiguration,
else => {},
}
}
if (i != 4) return LayoutError.BadWindowConfiguration;
const box = Box{
.x = try std.fmt.parseInt(i32, it.next() orelse return error.NotEnoughArguments, 10),
.y = try std.fmt.parseInt(i32, it.next() orelse return error.NotEnoughArguments, 10),
.width = try std.fmt.parseInt(u32, it.next() orelse return error.NotEnoughArguments, 10),
.height = try std.fmt.parseInt(u32, it.next() orelse return error.NotEnoughArguments, 10),
};
if (it.next() != null) return error.TooManyArguments;
return box;
}
test "parse window configuration" {
const testing = @import("std").testing;
var box = try parseWindowConfig("5 10 100 200");
const box = try parseBox("5 10 100 200");
testing.expect(box.x == 5);
testing.expect(box.y == 10);
testing.expect(box.width == 100);
@ -224,7 +221,7 @@ test "parse window configuration" {
/// Execute an external layout function, parse its output and apply the layout
/// to the output.
fn layoutExternal(self: *Self, visible_count: u32, output_tags: u32) !void {
fn layoutExternal(self: *Self, visible_count: u32) !void {
const config = self.root.server.config;
const xy_offset = @intCast(i32, config.border_width + config.outer_padding + config.view_padding);
const delta_size = (config.border_width + config.view_padding) * 2;
@ -267,7 +264,7 @@ fn layoutExternal(self: *Self, visible_count: u32, output_tags: u32) !void {
var parse_it = std.mem.split(buffer, "\n");
while (parse_it.next()) |token| {
if (std.mem.eql(u8, token, "")) break;
var box = try parseWindowConfig(token);
var box = try parseBox(token);
box.x += self.usable_box.x + xy_offset;
box.y += self.usable_box.y + xy_offset;
box.width -= delta_size;
@ -275,11 +272,11 @@ fn layoutExternal(self: *Self, visible_count: u32, output_tags: u32) !void {
try view_boxen.append(box);
}
if (view_boxen.items.len != visible_count) return LayoutError.ConfigurationMismatch;
if (view_boxen.items.len != visible_count) return LayoutError.WrongViewCount;
// Apply window configuration to views
var i: u32 = 0;
var view_it = ViewStack(View).pendingIterator(self.views.first, output_tags);
var view_it = ViewStack(View).pendingIterator(self.views.first, self.pending.tags);
while (view_it.next()) |node| {
const view = &node.view;
if (!view.pending.float and !view.pending.fullscreen) {
@ -308,17 +305,16 @@ pub fn arrangeViews(self: *Self) void {
// would cause an underflow and is pointless anyway.
if (layout_count == 0 or self.usable_box.width == 0 or self.usable_box.height == 0) return;
if (std.mem.eql(u8, self.layout, "full")) return layoutFull(self, layout_count, self.pending.tags);
if (std.mem.eql(u8, self.layout, "full")) return layoutFull(self, layout_count);
layoutExternal(self, layout_count, self.pending.tags) catch |err| {
self.layoutExternal(layout_count) catch |err| {
switch (err) {
LayoutError.BadExitCode => log.err(.layout, "layout command exited with non-zero return code", .{}),
LayoutError.BadWindowConfiguration => log.err(.layout, "invalid window configuration", .{}),
LayoutError.ConfigurationMismatch => log.err(.layout, "mismatch between window configuration and visible window counts", .{}),
else => log.err(.layout, "'{}' error while trying to use external layout", .{err}),
LayoutError.WrongViewCount => log.err(.layout, "mismatch between window configuration and visible window counts", .{}),
else => log.err(.layout, "failed to use external layout: {}", .{err}),
}
log.err(.layout, "falling back to internal layout", .{});
layoutFull(self, layout_count, self.pending.tags);
self.layoutFull(layout_count);
};
}