contrib: update layouts for river-layout and river-options
- Remove old layouts which no longer work. - Add new C layout.
This commit is contained in:
Leon Henrik Plickat
Isaac Freund
parent
d08032d685
commit
924a4707b7
476
contrib/layout.c
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476
contrib/layout.c
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@ -0,0 +1,476 @@
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/*
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* Tiled layout for river, implemented in understandable, simple, commented code.
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* Reading this code should help you get a basic understanding of how to use
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* river-layout to create a basic layout generator and how your layouts can
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* depend on values of river-options.
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*
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* Q: Wow, this is a lot of code just for a layout!
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* A: No, it really is not. Most of the code here is just generic Wayland client
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* boilerplate. The actual layout part is pretty small.
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*
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* Q: Can I use this to port dwm layouts to river?
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* A: Yes you can! You just need to replace the logic in layout_handle_layout_demand().
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* You don't even need to fully understand the protocol if all you want to
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* do is just port some simple layouts.
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*
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* Q: I have no idea how any of this works.
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* A: If all you want to do is create simple layouts, you do not need to
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* understand the Wayland parts of the code. If you still want to understand
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* it and are already familiar with how Wayland clients work, read the
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* protocol. If you are new to writing Wayland client code, you can read
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* https://wayland-book.com, then read the protocol.
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*
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* Q: How do I build this?
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* A: To build, you need to generate the header and code of the layout protocol
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* extension and link against them. This is achieved with the following
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* commands (You may want to setup a build system).
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*
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* wayland-scanner private-code < river-layout-v1.xml > river-layout-v1.c
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* wayland-scanner client-header < river-layout-v1.xml > river-layout-v1.h
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* wayland-scanner private-code < river-options-v2.xml > river-options-v2.c
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* wayland-scanner client-header < river-options-v2.xml > river-options-v2.h
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* gcc -Wall -Wextra -Wpedantic -Wno-unused-parameter -c -o layout.o layout.c
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* gcc -Wall -Wextra -Wpedantic -Wno-unused-parameter -c -o river-layout-v1.o river-layout-v1.c
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* gcc -Wall -Wextra -Wpedantic -Wno-unused-parameter -c -o river-options-v2.o river-options-v2.c
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* gcc -o layout layout.o river-layout-v1.o river-options-v2.o -lwayland-client
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*/
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#include<assert.h>
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#include<stdbool.h>
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#include<stdio.h>
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#include<stdlib.h>
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#include<string.h>
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#include<wayland-client.h>
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#include<wayland-client-protocol.h>
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#include"river-layout-v1.h"
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#include"river-options-v2.h"
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/* A few macros to indulge the inner glibc user. */
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#define MIN(a, b) ( a < b ? a : b )
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#define MAX(a, b) ( a > b ? a : b )
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#define CLAMP(a, b, c) ( MIN(MAX(b, c), MAX(MIN(b, c), a)) )
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enum Option_type
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{
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UINT_OPTION,
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DOUBLE_OPTION
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};
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struct Option
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{
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struct Output *output;
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struct river_option_handle_v2 *handle;
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enum Option_type type;
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union
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{
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uint32_t u;
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double d;
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} value;
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};
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struct Output
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{
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struct wl_list link;
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struct wl_output *output;
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struct river_layout_v1 *layout;
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struct Option main_count;
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struct Option main_factor;
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struct Option view_padding;
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struct Option outer_padding;
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bool configured;
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};
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/* In Wayland it's a good idea to have your main data global, since you'll need
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* it everywhere anyway.
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*/
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struct wl_display *wl_display;
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struct wl_registry *wl_registry;
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struct wl_callback *sync_callback;
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struct river_layout_manager_v1 *layout_manager;
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struct river_options_manager_v2 *options_manager;
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struct wl_list outputs;
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bool loop = true;
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int ret = EXIT_FAILURE;
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static void layout_handle_layout_demand (void *data, struct river_layout_v1 *river_layout_v1,
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uint32_t view_count, uint32_t width, uint32_t height, uint32_t tags, uint32_t serial)
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{
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struct Output *output = (struct Output *)data;
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/* Simple tiled layout with no frills.
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*
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* If you want to create your own simple layout, just rip the following
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* code out and replace it with your own logic. All content un-aware
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* dynamic tiling layouts you know, for example from dwm, can be easily
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* ported to river this way. If you want to create layouts that are
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* content aware, meaning they react to the currently visible windows,
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* you have to create handlers for the advertise_view and advertise_done
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* events. Happy hacking!
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*/
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width -= 2 * output->outer_padding.value.u, height -= 2 * output->outer_padding.value.u;
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const double main_factor = CLAMP(output->main_factor.value.d, 0.1, 0.9);
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unsigned int main_size, stack_size, view_x, view_y, view_width, view_height;
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if ( output->main_count.value.u == 0 )
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{
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main_size = 0;
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stack_size = width;
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}
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else if ( view_count <= output->main_count.value.u )
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{
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main_size = width;
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stack_size = 0;
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}
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else
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{
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main_size = width * main_factor;
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stack_size = width - main_size;
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}
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for (unsigned int i = 0; i < view_count; i++)
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{
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if ( i < output->main_count.value.u ) /* main area. */
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{
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view_x = 0;
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view_width = main_size;
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view_height = height / MIN(output->main_count.value.u, view_count);
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view_y = i * view_height;
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}
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else /* Stack area. */
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{
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view_x = main_size;
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view_width = stack_size;
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view_height = height / ( view_count - output->main_count.value.u);
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view_y = (i - output->main_count.value.u) * view_height;
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}
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river_layout_v1_push_view_dimensions(output->layout, serial,
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view_x + output->view_padding.value.u + output->outer_padding.value.u,
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view_y + output->view_padding.value.u + output->outer_padding.value.u,
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view_width - (2 * output->view_padding.value.u),
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view_height - (2 * output->view_padding.value.u));
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}
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river_layout_v1_commit(output->layout, serial);
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}
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static void layout_handle_namespace_in_use (void *data, struct river_layout_v1 *river_layout_v1)
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{
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/* Oh no, the namespace we choose is already used by another client!
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* All we can do now is destroy the river_layout object. Because we are
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* lazy, we just abort and let our cleanup mechanism destroy it. A more
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* sophisticated client could instead destroy only the one single
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* affected river_layout object and recover from this mishap. Writing
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* such a client is left as an exercise for the reader.
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*/
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fputs("Namespace already in use.\n", stderr);
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loop = false;
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}
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/* A no-op function we plug into listeners when we don't want to handle an event. */
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static void noop () {}
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static const struct river_layout_v1_listener layout_listener = {
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.namespace_in_use = layout_handle_namespace_in_use,
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.layout_demand = layout_handle_layout_demand,
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.advertise_view = noop,
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.advertise_done = noop,
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};
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static void option_handle_uint (void *data, struct river_option_handle_v2 *handle,
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uint32_t value)
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{
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struct Option *option = (struct Option *)data;
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/* We have received an event with the value of this option. But we
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* can only use it if it matches the type we want.
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*/
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if ( option->type == UINT_OPTION )
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{
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option->value.u = value;
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/* Our layout depends on the value of this option. We need to
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* signal the compositor that one of the parameters we use to
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* generate the layout has changed. It may then decide to start
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* a new layout demand process.
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*/
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river_layout_v1_parameters_changed(option->output->layout);
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}
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}
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static void option_handle_fixed (void *data, struct river_option_handle_v2 *handle,
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wl_fixed_t value)
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{
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struct Option *option = (struct Option *)data;
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if ( option->type == DOUBLE_OPTION )
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{
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option->value.d = wl_fixed_to_double(value);
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river_layout_v1_parameters_changed(option->output->layout);
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}
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}
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static const struct river_option_handle_v2_listener option_listener = {
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.int_value = noop,
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.uint_value = option_handle_uint,
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.fixed_value = option_handle_fixed,
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.string_value = noop,
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/* This event will be sent by the compositor when the requested option does
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* not exist. Since we declared all options we plan on using at startup, we
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* can safely ignore this event.
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*/
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.undeclared = noop,
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};
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static void configure_output (struct Output *output)
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{
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output->configured = true;
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/* The namespace of the layout is how the compositor chooses what layout
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* to use. It can be any arbitrary string. It should describe roughly
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* what kind of layout your client will create, so here we use "tile".
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*/
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output->layout = river_layout_manager_v1_get_layout(layout_manager,
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output->output, "tile");
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river_layout_v1_add_listener(output->layout, &layout_listener, output);
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/* The amount of main views and other such values are communicated using
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* river-options. You can have an arbitrary amount of options which hold
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* arbitrary values. Here we are boring and just use the ones you'd
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* typically expect for typical tiled layouts.
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*
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* Careful: Options can have a wrong type (set by other clients) which
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* is a special case we have to handle. In case of this example layout
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* generator it is handled by simply ignoring the wrong events and falling
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* back to defaults.
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*/
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output->main_count.handle = river_options_manager_v2_get_option_handle(
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options_manager, "main_count", output->output);
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river_option_handle_v2_add_listener(output->main_count.handle,
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&option_listener, &output->main_count);
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output->main_factor.handle = river_options_manager_v2_get_option_handle(
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options_manager, "main_factor", output->output);
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river_option_handle_v2_add_listener(output->main_factor.handle,
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&option_listener, &output->main_factor);
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output->view_padding.handle = river_options_manager_v2_get_option_handle(
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options_manager, "view_padding", output->output);
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river_option_handle_v2_add_listener(output->view_padding.handle,
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&option_listener, &output->view_padding);
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output->outer_padding.handle = river_options_manager_v2_get_option_handle(
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options_manager, "outer_padding", output->output);
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river_option_handle_v2_add_listener(output->outer_padding.handle,
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&option_listener, &output->outer_padding);
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}
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static bool create_output (struct wl_output *wl_output)
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{
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struct Output *output = calloc(1, sizeof(struct Output));
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if ( output == NULL )
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{
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fputs("Failed to allocate.\n", stderr);
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return false;
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}
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output->output = wl_output;
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output->layout = NULL;
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output->configured = false;
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output->main_count.value.u = 1;
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output->main_count.handle = NULL;
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output->main_count.type = UINT_OPTION;
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output->main_count.output = output;
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output->main_factor.value.d = 0.6;
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output->main_factor.handle = NULL;
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output->main_factor.type = DOUBLE_OPTION;
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output->main_factor.output = output;
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output->view_padding.value.u = 5;
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output->view_padding.handle = NULL;
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output->view_padding.type = UINT_OPTION;
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output->view_padding.output = output;
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output->outer_padding.value.u = 5;
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output->outer_padding.handle = NULL;
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output->outer_padding.type = UINT_OPTION;
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output->outer_padding.output = output;
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/* If we already have the river_layout_manager and the river_options_manager,
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* we can get a river_layout for this output.
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*/
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if ( layout_manager != NULL && options_manager != NULL )
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configure_output(output);
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wl_list_insert(&outputs, &output->link);
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return true;
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}
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static void destroy_output (struct Output *output)
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{
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if ( output->layout != NULL )
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river_layout_v1_destroy(output->layout);
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if ( output->main_count.handle != NULL )
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river_option_handle_v2_destroy(output->main_count.handle);
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if ( output->main_factor.handle != NULL )
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river_option_handle_v2_destroy(output->main_factor.handle);
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if ( output->view_padding.handle != NULL )
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river_option_handle_v2_destroy(output->view_padding.handle);
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if ( output->outer_padding.handle != NULL )
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river_option_handle_v2_destroy(output->outer_padding.handle);
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wl_output_destroy(output->output);
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wl_list_remove(&output->link);
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free(output);
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}
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static void destroy_all_outputs ()
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{
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struct Output *output, *tmp;
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wl_list_for_each_safe(output, tmp, &outputs, link)
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destroy_output(output);
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}
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static void registry_handle_global (void *data, struct wl_registry *registry,
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uint32_t name, const char *interface, uint32_t version)
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{
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if (! strcmp(interface, river_layout_manager_v1_interface.name))
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layout_manager = wl_registry_bind(registry, name,
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&river_layout_manager_v1_interface, 1);
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else if (! strcmp(interface, river_options_manager_v2_interface.name))
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options_manager = wl_registry_bind(registry, name,
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&river_options_manager_v2_interface, 1);
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else if (! strcmp(interface, wl_output_interface.name))
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{
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struct wl_output *wl_output = wl_registry_bind(registry, name,
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&wl_output_interface, version);
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if (! create_output(wl_output))
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{
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loop = false;
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ret = EXIT_FAILURE;
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}
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}
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}
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static const struct wl_registry_listener registry_listener = {
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.global = registry_handle_global,
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.global_remove = noop
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};
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static void sync_handle_done (void *data, struct wl_callback *wl_callback,
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uint32_t irrelevant)
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{
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wl_callback_destroy(wl_callback);
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sync_callback = NULL;
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/* When this function is called, the registry finished advertising all
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* available globals. Let's check if we have everything we need.
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*/
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if ( layout_manager == NULL )
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{
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fputs("Wayland compositor does not support river-layout-v1.\n", stderr);
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ret = EXIT_FAILURE;
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loop = false;
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return;
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}
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if ( options_manager == NULL )
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{
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fputs("Wayland compositor does not support river-options-v2.\n", stderr);
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ret = EXIT_FAILURE;
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loop = false;
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return;
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}
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/* The options we want to use may not exist yet, so let's declare them with
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* some sensible defaults. If they do already exists, river will ignore this.
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* How these options are named and what you end up doing with them is totally
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* up to your creativity.
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*/
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river_options_manager_v2_declare_uint_option(options_manager, "main_count", 1);
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river_options_manager_v2_declare_fixed_option(options_manager, "main_factor", wl_fixed_from_double(0.6));
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river_options_manager_v2_declare_uint_option(options_manager, "view_padding", 5);
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river_options_manager_v2_declare_uint_option(options_manager, "outer_padding", 5);
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/* If outputs were registered before both river_layout_manager and
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* river_options_manager where available, they won't have a river_layout
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* nor the option handles, so we need to create those here.
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*/
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struct Output *output;
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wl_list_for_each(output, &outputs, link)
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if (! output->configured)
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configure_output(output);
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}
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static const struct wl_callback_listener sync_callback_listener = {
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.done = sync_handle_done,
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};
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static bool init_wayland (void)
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{
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/* We query the display name here instead of letting wl_display_connect()
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* figure it out itself, because libwayland (for legacy reasons) falls
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* back to using "wayland-0" when $WAYLAND_DISPLAY is not set, which is
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* generally not desirable.
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*/
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const char *display_name = getenv("WAYLAND_DISPLAY");
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if ( display_name == NULL )
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{
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fputs("WAYLAND_DISPLAY is not set.\n", stderr);
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return false;
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}
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wl_display = wl_display_connect(display_name);
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if ( wl_display == NULL )
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{
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fputs("Can not connect to Wayland server.\n", stderr);
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return false;
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}
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wl_list_init(&outputs);
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wl_registry = wl_display_get_registry(wl_display);
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wl_registry_add_listener(wl_registry, ®istry_listener, NULL);
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/* The sync callback we attach here will be called when all previous
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* requests have been handled by the server.
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*/
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sync_callback = wl_display_sync(wl_display);
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wl_callback_add_listener(sync_callback, &sync_callback_listener, NULL);
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return true;
|
||||
}
|
||||
|
||||
static void finish_wayland (void)
|
||||
{
|
||||
if ( wl_display == NULL )
|
||||
return;
|
||||
|
||||
destroy_all_outputs();
|
||||
|
||||
if ( sync_callback != NULL )
|
||||
wl_callback_destroy(sync_callback);
|
||||
if ( layout_manager != NULL )
|
||||
river_layout_manager_v1_destroy(layout_manager);
|
||||
if ( options_manager != NULL )
|
||||
river_options_manager_v2_destroy(options_manager);
|
||||
|
||||
wl_registry_destroy(wl_registry);
|
||||
wl_display_disconnect(wl_display);
|
||||
}
|
||||
|
||||
int main (int argc, char *argv[])
|
||||
{
|
||||
if (init_wayland())
|
||||
{
|
||||
ret = EXIT_SUCCESS;
|
||||
while ( loop && wl_display_dispatch(wl_display) != -1 );
|
||||
}
|
||||
finish_wayland();
|
||||
return ret;
|
||||
}
|
||||
@ -1,16 +0,0 @@
|
||||
#!/bin/bash
|
||||
# Randomized Layout for debug purposes.
|
||||
|
||||
CLIENTS="$1"
|
||||
OUTPUT_WIDTH="$4"
|
||||
OUTPUT_HEIGHT="$5"
|
||||
|
||||
for _ in $(seq 1 "$CLIENTS")
|
||||
do
|
||||
WIDTH="$(( ( OUTPUT_WIDTH / 5 ) ))"
|
||||
HEIGHT="$(( ( OUTPUT_HEIGHT / 5 ) ))"
|
||||
X="$(( ( RANDOM % ( OUTPUT_WIDTH - WIDTH ) ) + 1 ))"
|
||||
Y="$(( ( RANDOM % ( OUTPUT_HEIGHT - HEIGHT ) ) + 1 ))"
|
||||
echo "$X $Y $WIDTH $HEIGHT"
|
||||
done
|
||||
|
||||
@ -1,44 +0,0 @@
|
||||
#!/bin/bash
|
||||
# Randomized Layout for debug purposes. This version randomly makes some errors
|
||||
# see how river handles incorrect output of layout executables.
|
||||
|
||||
CLIENTS="$1"
|
||||
OUTPUT_WIDTH="$4"
|
||||
OUTPUT_HEIGHT="$5"
|
||||
|
||||
for _ in $(seq 1 "$CLIENTS")
|
||||
do
|
||||
WIDTH="$(( ( OUTPUT_WIDTH / 5 ) ))"
|
||||
HEIGHT="$(( ( OUTPUT_HEIGHT / 5 ) ))"
|
||||
X="$(( ( RANDOM % ( OUTPUT_WIDTH - WIDTH ) ) + 1 ))"
|
||||
Y="$(( ( RANDOM % ( OUTPUT_HEIGHT - HEIGHT ) ) + 1 ))"
|
||||
|
||||
# Mix in some errors
|
||||
case "$(( ( RANDOM % 10 ) ))" in
|
||||
0) # Too few layout rows
|
||||
;;
|
||||
|
||||
1) # Too many layout rows
|
||||
echo "$X $Y $WIDTH $HEIGHT"
|
||||
echo "$X $Y $WIDTH $HEIGHT"
|
||||
;;
|
||||
|
||||
2) # Too few layout columns
|
||||
echo "$X $Y $WIDTH"
|
||||
;;
|
||||
|
||||
3) # Too many layout columns
|
||||
echo "$X $Y $WIDTH $HEIGHT $X"
|
||||
;;
|
||||
|
||||
|
||||
4) # Negative view size
|
||||
echo "$X $Y -$WIDTH $HEIGHT $X"
|
||||
;;
|
||||
|
||||
*) # Expected behaviour
|
||||
echo "$X $Y $WIDTH $HEIGHT"
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
@ -1,68 +0,0 @@
|
||||
#!/bin/env python
|
||||
|
||||
from sys import argv
|
||||
|
||||
# This is an implementation of the default "tiled" layout of dwm
|
||||
#
|
||||
# With 4 views and one main view, the layout looks something like this:
|
||||
#
|
||||
# +-----------------------+------------+
|
||||
# | | |
|
||||
# | | |
|
||||
# | | |
|
||||
# | +------------+
|
||||
# | | |
|
||||
# | | |
|
||||
# | | |
|
||||
# | +------------+
|
||||
# | | |
|
||||
# | | |
|
||||
# | | |
|
||||
# +-----------------------+------------+
|
||||
|
||||
# Assign the arguments to variables. The order and meaning of the arguments
|
||||
# is explained in the river-layouts(7) man page
|
||||
num_views = int(argv[1])
|
||||
main_count = int(argv[2])
|
||||
main_factor = float(argv[3])
|
||||
output_width = int(argv[4])
|
||||
output_height = int(argv[5])
|
||||
|
||||
secondary_count = num_views - main_count
|
||||
|
||||
# handle the cases where there are no main or no secondary views
|
||||
main_width = 0
|
||||
secondary_width = 0
|
||||
if main_count > 0 and secondary_count > 0:
|
||||
main_width = int(main_factor * output_width)
|
||||
secondary_width = output_width - main_width
|
||||
elif main_count > 0:
|
||||
main_width = output_width
|
||||
elif secondary_count > 0:
|
||||
secondary_width = output_width
|
||||
|
||||
|
||||
# for each view, output the location/dimensions separated by spaces on a new line
|
||||
for i in range(num_views):
|
||||
if i < main_count:
|
||||
# to make things pixel-perfect, we make the first main and first secondary
|
||||
# view slightly larger if the height is not evenly divisible
|
||||
main_height = output_height // main_count
|
||||
main_height_rem = output_height % main_count
|
||||
|
||||
x = 0
|
||||
y = i * main_height + (main_height_rem if i > 0 else 0)
|
||||
width = main_width
|
||||
height = main_height + (main_height_rem if i == 0 else 0)
|
||||
|
||||
print(x, y, width, height)
|
||||
else:
|
||||
secondary_height = output_height // secondary_count
|
||||
secondary_height_rem = output_height % secondary_count
|
||||
|
||||
x = main_width
|
||||
y = (i - main_count) * secondary_height + (secondary_height_rem if i > main_count else 0)
|
||||
width = secondary_width
|
||||
height = secondary_height + (secondary_height_rem if i == main_count else 0)
|
||||
|
||||
print(x, y, width, height)
|
||||
Loading…
Reference in New Issue
Block a user