diff --git a/river/Output.zig b/river/Output.zig index d97ebfb..73ddae1 100644 --- a/river/Output.zig +++ b/river/Output.zig @@ -1,6 +1,7 @@ // This file is part of river, a dynamic tiling wayland compositor. // // Copyright 2020 Isaac Freund +// Copyright 2020 Leon Henrik Plickat // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by @@ -29,6 +30,13 @@ const Root = @import("Root.zig"); const View = @import("View.zig"); const ViewStack = @import("view_stack.zig").ViewStack; const OutputStatus = @import("OutputStatus.zig"); +/// Minimum width/height for surfaces. +// This is needed, because external layouts and large padding and border sizes +// may cause surfaces so small, that bugs in client applications are encountered, +// or even surfaces of zero or negative size,which are a protocol error and would +// likely cause river to crash. The value is totally arbitrary and low enough, +// that it should never be encountered during normal usage. +const minimum_size = 50; root: *Root, wlr_output: *c.wlr_output, @@ -185,194 +193,41 @@ pub fn sendViewTags(self: Self) void { while (it) |node| : (it = node.next) node.data.sendViewTags(); } -const MasterPosition = enum { - Top, - Right, - Bottom, - Left, -}; - -/// Default layout of master-stack and slave-stack. -pub fn layoutMasterStack(self: *Self, visible_count: u32, output_tags: u32, position: MasterPosition) void { - const master_count = std.math.min(self.master_count, visible_count); - const slave_count = if (master_count >= visible_count) 0 else visible_count - master_count; - +/// 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 { 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; + const xy_offset = @intCast(i32, outer_padding + border_width + view_padding); - const layout_width = @intCast(u32, self.usable_box.width) - outer_padding * 2; - const layout_height = @intCast(u32, self.usable_box.height) - outer_padding * 2; + var full_box: Box = .{ + .x = self.usable_box.x + @intCast(i32, xy_offset), + .y = self.usable_box.y + @intCast(i32, xy_offset), + .width = self.usable_box.width - (2 * xy_offset), + .height = self.usable_box.height - (2 * xy_offset), + }; - // Depending on position of the master area, - // the *_stack_size is either width or height - var master_stack_size: u32 = undefined; - var slave_stack_size: u32 = undefined; - if (master_count > 0 and slave_count > 0) { - // If both master and slave views are present - if (position == MasterPosition.Right or position == MasterPosition.Left) { - master_stack_size = @floatToInt(u32, @round(@intToFloat(f64, layout_width) * self.master_factor)); - slave_stack_size = layout_width - master_stack_size; - } else { - master_stack_size = @floatToInt(u32, @round(@intToFloat(f64, layout_height) * self.master_factor)); - slave_stack_size = layout_height - master_stack_size; - } - } else if (master_count > 0) { - if (position == MasterPosition.Right or position == MasterPosition.Left) { - master_stack_size = layout_width; - } else { - master_stack_size = layout_height; - } - slave_stack_size = 0; - } else { - if (position == MasterPosition.Right or position == MasterPosition.Left) { - slave_stack_size = layout_width; - } else { - slave_stack_size = layout_height; - } - master_stack_size = 0; + // Apply minimum view size + if (full_box.width < minimum_size) { + full_box.width = minimum_size; + } + if (full_box.height < minimum_size) { + full_box.height = minimum_size; } - var i: u32 = 0; var it = ViewStack(View).pendingIterator(self.views.first, output_tags); while (it.next()) |node| { const view = &node.view; - - if (view.floating) { - continue; - } - - var new_box: Box = undefined; - - // Add the remainder to the first master/slave to ensure every - // pixel of height is used - if (i < master_count) { - if (position == MasterPosition.Top) { // Top master - const master_width = @divTrunc(layout_width, master_count); - const master_width_rem = layout_width % master_count; - new_box = .{ - .x = @intCast(i32, i * master_width + if (i > 0) master_width_rem else 0), - .y = 0, - .width = master_width + if (i == 0) master_width_rem else 0, - .height = master_stack_size, - }; - } else if (position == MasterPosition.Right) { // Right master - const master_height = @divTrunc(layout_height, master_count); - const master_height_rem = layout_height % master_count; - new_box = .{ - .x = @intCast(i32, slave_stack_size), - .y = @intCast(i32, i * master_height + if (i > 0) master_height_rem else 0), - .width = master_stack_size, - .height = master_height + if (i == 0) master_height_rem else 0, - }; - } else if (position == MasterPosition.Bottom) { // Bottom master - const master_width = @divTrunc(layout_width, master_count); - const master_width_rem = layout_width % master_count; - new_box = .{ - .x = @intCast(i32, i * master_width + if (i > 0) master_width_rem else 0), - .y = @intCast(i32, slave_stack_size), - .width = master_width + if (i == 0) master_width_rem else 0, - .height = master_stack_size, - }; - } else { // Left master - const master_height = @divTrunc(layout_height, master_count); - const master_height_rem = layout_height % master_count; - new_box = .{ - .x = 0, - .y = @intCast(i32, i * master_height + if (i > 0) master_height_rem else 0), - .width = master_stack_size, - .height = master_height + if (i == 0) master_height_rem else 0, - }; - } - } else { - if (position == MasterPosition.Top) { // Top master - const slave_width = @divTrunc(layout_width, slave_count); - const slave_width_rem = layout_width % slave_count; - new_box = .{ - .x = @intCast(i32, (i - master_count) * slave_width + if (i > master_count) slave_width_rem else 0), - .y = @intCast(i32, master_stack_size), - .width = slave_width + if (i == master_count) slave_width_rem else 0, - .height = slave_stack_size, - }; - } else if (position == MasterPosition.Right) { // Right master - const slave_height = @divTrunc(layout_height, slave_count); - const slave_height_rem = layout_height % slave_count; - new_box = .{ - .x = 0, - .y = @intCast(i32, (i - master_count) * slave_height + if (i > master_count) slave_height_rem else 0), - .width = slave_stack_size, - .height = slave_height + if (i == master_count) slave_height_rem else 0, - }; - } else if (position == MasterPosition.Bottom) { // Bottom master - const slave_width = @divTrunc(layout_width, slave_count); - const slave_width_rem = layout_width % slave_count; - new_box = .{ - .x = @intCast(i32, (i - master_count) * slave_width + if (i > master_count) slave_width_rem else 0), - .y = 0, - .width = slave_width + if (i == master_count) slave_width_rem else 0, - .height = slave_stack_size, - }; - } else { // Left master - const slave_height = @divTrunc(layout_height, slave_count); - const slave_height_rem = layout_height % slave_count; - new_box = .{ - .x = @intCast(i32, master_stack_size), - .y = @intCast(i32, (i - master_count) * slave_height + if (i > master_count) slave_height_rem else 0), - .width = slave_stack_size, - .height = slave_height + if (i == master_count) slave_height_rem else 0, - }; - } - } - - // Apply offsets from borders and padding - const xy_offset = @intCast(i32, border_width + outer_padding + view_padding); - new_box.x += self.usable_box.x + xy_offset; - new_box.y += self.usable_box.y + xy_offset; - - // Reduce size to allow space for borders/padding - const delta_size = (border_width + view_padding) * 2; - new_box.width -= delta_size; - new_box.height -= delta_size; - - // Set the view's pending box to the new dimensions - view.pending_box = new_box; - - i += 1; + if (view.floating) continue; + view.pending_box = full_box; } } -/// Wrapper for default layout with master area on the top -pub fn layoutTopMaster(self: *Self, visible_count: u32, output_tags: u32) void { - layoutMasterStack(self, visible_count, output_tags, MasterPosition.Top); -} - -/// Wrapper for default layout with master area on the right -pub fn layoutRightMaster(self: *Self, visible_count: u32, output_tags: u32) void { - layoutMasterStack(self, visible_count, output_tags, MasterPosition.Right); -} - -/// Wrapper for default layout with master area on the bottom -pub fn layoutBottomMaster(self: *Self, visible_count: u32, output_tags: u32) void { - layoutMasterStack(self, visible_count, output_tags, MasterPosition.Bottom); -} - -/// Wrapper for default layout with master area on the left -pub fn layoutLeftMaster(self: *Self, visible_count: u32, output_tags: u32) void { - layoutMasterStack(self, visible_count, output_tags, MasterPosition.Left); -} - -/// A layout in which every window uses the maximum available space. -pub fn layoutFull(self: *Self, visible_count: u32, output_tags: 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; - const layout_width = @intCast(u32, self.usable_box.width) - - (outer_padding * 2) - (border_width * 2) - (view_padding * 2); - const layout_height = @intCast(u32, self.usable_box.height) - - (outer_padding * 2) - (border_width * 2) - (view_padding * 2); - const x_offset = self.usable_box.x + @intCast(i32, outer_padding + border_width + view_padding); - const y_offset = self.usable_box.y + @intCast(i32, outer_padding + border_width + view_padding); var i: u32 = 0; var it = ViewStack(View).pendingIterator(self.views.first, output_tags);