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path: root/src/layout.c
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/*
 * Copyright © 2019 Collabora, Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "ivi-compositor.h"
#include "policy.h"

#include <assert.h>
#include <string.h>

#include <libweston/libweston.h>
#include <libweston-desktop/libweston-desktop.h>

#include "agl-shell-desktop-server-protocol.h"

#define AGL_COMP_DEBUG

static void
ivi_background_init(struct ivi_compositor *ivi, struct ivi_output *output)
{
	struct weston_output *woutput = output->output;
	struct ivi_surface *bg = output->background;
	struct weston_view *view;

	if (!bg) {
		weston_log("WARNING: Output does not have a background\n");
		return;
	}

	assert(bg->role == IVI_SURFACE_ROLE_BACKGROUND);

	view = bg->view;

	weston_view_set_output(view, woutput);
	weston_view_set_position(view, woutput->x, woutput->y);

#ifdef AGL_COMP_DEBUG
	weston_log("(background) position view %p, x %d, y %d\n", view,
			woutput->x, woutput->y);
#endif

	view->is_mapped = true;
	view->surface->is_mapped = true;

	weston_layer_entry_insert(&ivi->background.view_list, &view->layer_link);
}

static void
ivi_panel_init(struct ivi_compositor *ivi, struct ivi_output *output,
	       struct ivi_surface *panel)
{
	struct weston_output *woutput = output->output;
	struct weston_desktop_surface *dsurface;
	struct weston_view *view;
	struct weston_geometry geom;
	int x = woutput->x;
	int y = woutput->y;

	if (!panel)
		return;

	assert(panel->role == IVI_SURFACE_ROLE_PANEL);
	dsurface = panel->dsurface;
	view = panel->view;
	geom = weston_desktop_surface_get_geometry(dsurface);
#ifdef AGL_COMP_DEBUG
	weston_log("geom.width %d, geom.height %d, geom.x %d, geom.y %d\n",
			geom.width, geom.height, geom.x, geom.y);
#endif
	switch (panel->panel.edge) {
	case AGL_SHELL_EDGE_TOP:
		output->area.y += geom.height;
		output->area.height -= geom.height;
		break;
	case AGL_SHELL_EDGE_BOTTOM:
		y += woutput->height - geom.height;
		output->area.height -= geom.height;
		break;
	case AGL_SHELL_EDGE_LEFT:
		output->area.x += geom.width;
		output->area.width -= geom.width;
		break;
	case AGL_SHELL_EDGE_RIGHT:
		x += woutput->width - geom.width;
		output->area.width -= geom.width;
		break;
	}

	x -= geom.x;
	y -= geom.y;

	weston_view_set_output(view, woutput);
	weston_view_set_position(view, x, y);
#ifdef AGL_COMP_DEBUG
	weston_log("(panel) edge %d position view %p, x %d, y %d\n",
			panel->panel.edge, view, x, y);
#endif

	/* this is necessary for cases we already mapped it desktop_committed()
	 * but we not running the older qtwayland, so we still have a chance
	 * for this to run at the next test */
	if (view->surface->is_mapped) {
		weston_layer_entry_remove(&view->layer_link);

		view->is_mapped = false;
		view->surface->is_mapped = false;
	}

	/* give ivi_layout_panel_committed() a chance to map the view/surface
	 * instead */
	if ((geom.width == geom.height && geom.width == 0) &&
	    (geom.x == geom.y && geom.x == 0) &&
	    panel->panel.edge != AGL_SHELL_EDGE_TOP)
		return;

	view->is_mapped = true;
	view->surface->is_mapped = true;
#ifdef AGL_COMP_DEBUG
	weston_log("panel type %d inited\n", panel->panel.edge);
#endif
	weston_layer_entry_insert(&ivi->panel.view_list, &view->layer_link);
}

/*
 * Initializes all static parts of the layout, i.e. the background and panels.
 */
void
ivi_layout_init(struct ivi_compositor *ivi, struct ivi_output *output)
{
	ivi_background_init(ivi, output);

	output->area.x = 0;
	output->area.y = 0;
	output->area.width = output->output->width;
	output->area.height = output->output->height;

	ivi_panel_init(ivi, output, output->top);
	ivi_panel_init(ivi, output, output->bottom);
	ivi_panel_init(ivi, output, output->left);
	ivi_panel_init(ivi, output, output->right);

	weston_compositor_schedule_repaint(ivi->compositor);

	weston_log("Usable area: %dx%d+%d,%d\n",
		   output->area.width, output->area.height,
		   output->area.x, output->area.y);
}

struct ivi_surface *
ivi_find_app(struct ivi_compositor *ivi, const char *app_id)
{
	struct ivi_surface *surf;
	const char *id;

	wl_list_for_each(surf, &ivi->surfaces, link) {
		id = weston_desktop_surface_get_app_id(surf->dsurface);
		if (id && strcmp(app_id, id) == 0)
			return surf;
	}

	return NULL;
}

static void
ivi_layout_activate_complete(struct ivi_output *output,
			     struct ivi_surface *surf)
{
	struct ivi_compositor *ivi = output->ivi;
	struct weston_output *woutput = output->output;
	struct weston_view *view = surf->view;

	if (weston_view_is_mapped(view)) {
		weston_layer_entry_remove(&view->layer_link);
	}

	weston_view_set_output(view, woutput);
	weston_view_set_position(view,
				 woutput->x + output->area.x,
				 woutput->y + output->area.y);

	view->is_mapped = true;
	view->surface->is_mapped = true;

	if (output->active) {
		output->active->view->is_mapped = false;
		output->active->view->surface->is_mapped = false;

		weston_layer_entry_remove(&output->active->view->layer_link);
	}
	output->previous_active = output->active;
	output->active = surf;

	weston_layer_entry_insert(&ivi->normal.view_list, &view->layer_link);
	weston_view_update_transform(view);

	/* force repaint of the entire output */
	weston_output_damage(output->output);
	surf->desktop.last_output = surf->desktop.pending_output;
	surf->desktop.pending_output = NULL;
}

static struct ivi_output *
ivi_layout_find_bg_output(struct ivi_compositor *ivi)
{
	struct ivi_output *out;

	wl_list_for_each(out, &ivi->outputs, link) {
		if (out->background &&
		    out->background->role == IVI_SURFACE_ROLE_BACKGROUND)
			return out;
	}

	return NULL;
}

void
ivi_layout_desktop_committed(struct ivi_surface *surf)
{
	struct weston_desktop_surface *dsurf = surf->dsurface;
	struct weston_geometry geom = weston_desktop_surface_get_geometry(dsurf);
	struct ivi_output *output;

	assert(surf->role == IVI_SURFACE_ROLE_DESKTOP);

	output = surf->desktop.pending_output;
	if (!output) {
		struct ivi_output *ivi_bg_output;
		struct ivi_policy *policy = surf->ivi->policy;

		if (policy && policy->api.surface_activate_by_default)
			if (policy->api.surface_activate_by_default(surf, surf->ivi))
				goto skip_config_check;

		if (!surf->ivi->quirks.activate_apps_by_default)
			return;

skip_config_check:
		/* we can only activate it again by using the protocol */
		if (surf->activated_by_default)
			return;

		ivi_bg_output = ivi_layout_find_bg_output(surf->ivi);

		/* use the output of the bg to activate the app on start-up by
		 * default */
		if (surf->view && ivi_bg_output) {
			const char *app_id =
				weston_desktop_surface_get_app_id(dsurf);
			if (app_id && ivi_bg_output) {
				ivi_layout_activate(ivi_bg_output, app_id);
				surf->activated_by_default = true;
			}
		}

		return;
	}

	if (!weston_desktop_surface_get_maximized(dsurf) ||
	    geom.width != output->area.width ||
	    geom.height != output->area.height)
		return;

	ivi_layout_activate_complete(output, surf);
}

void
ivi_layout_fullscreen_committed(struct ivi_surface *surface)
{
	struct ivi_compositor *ivi = surface->ivi;

	struct weston_desktop_surface *dsurface = surface->dsurface;
	struct weston_surface *wsurface =
		weston_desktop_surface_get_surface(dsurface);

	struct ivi_output *output = surface->split.output;
	struct weston_output *woutput = output->output;

	struct weston_view *view = surface->view;
	struct weston_geometry geom;

	if (surface->view->is_mapped)
		return;

	geom = weston_desktop_surface_get_geometry(dsurface);
	weston_log("(fs) geom x %d, y %d, width %d, height %d\n", geom.x, geom.y,
			geom.width, geom.height);

	assert(surface->role == IVI_SURFACE_ROLE_FULLSCREEN);

	weston_desktop_surface_set_fullscreen(dsurface, true);

	weston_view_set_output(view, woutput);
	weston_view_set_position(view, woutput->x, woutput->y);
	weston_layer_entry_insert(&ivi->fullscreen.view_list, &view->layer_link);

	weston_view_update_transform(view);
	weston_view_damage_below(view);

	wsurface->is_mapped = true;
	surface->view->is_mapped = true;
}

void
ivi_layout_desktop_resize(struct ivi_surface *surface,
			  struct weston_geometry area)
{
	struct weston_desktop_surface *dsurf = surface->dsurface;
	struct weston_view *view = surface->view;

	int x = area.x;
	int y = area.y;
	int width = area.width;
	int height = area.height;

	weston_desktop_surface_set_size(dsurf,
					width, height);

	weston_view_set_position(view, x, y);
	weston_view_update_transform(view);
	weston_view_damage_below(view);
}

void
ivi_layout_split_committed(struct ivi_surface *surface)
{
	struct ivi_compositor *ivi = surface->ivi;

	struct weston_desktop_surface *dsurface = surface->dsurface;
	struct weston_surface *wsurface =
		weston_desktop_surface_get_surface(dsurface);

	struct ivi_output *output = surface->split.output;
	struct weston_output *woutput = output->output;

	struct weston_view *view = surface->view;
	struct weston_geometry geom;

	int x, y;
	int width, height;

	x = woutput->x;
	y = woutput->y;

	if (surface->view->is_mapped)
		return;

	geom = weston_desktop_surface_get_geometry(dsurface);

	assert(surface->role == IVI_SURFACE_ROLE_SPLIT_H ||
	       surface->role == IVI_SURFACE_ROLE_SPLIT_V);

	/* save the previous area in order to recover it back when if this kind
	 * of surface is being destroyed/removed */
	output->area_saved = output->area;

	switch (surface->role) {
	case IVI_SURFACE_ROLE_SPLIT_V:
		if (geom.width == woutput->width &&
		    geom.height == woutput->height)
			geom.width = (output->area.width / 2);

		x += woutput->width - geom.width;
		output->area.width -= geom.width;

		width = woutput->width - x;
		height = output->area.height;
		y = output->area.y;

		break;
	case IVI_SURFACE_ROLE_SPLIT_H:
		if (geom.width == woutput->width &&
		    geom.height == woutput->height)
			geom.height = (output->area.height / 2);

		y = output->area.y;
		output->area.y += geom.height;
		output->area.height -= geom.height;

		width = output->area.width;
		height = output->area.height;

		x = output->area.x;

		break;
	default:
		assert(!"Invalid split orientation\n");
	}

	weston_desktop_surface_set_size(dsurface,
					width, height);

	/* resize the active surface first, output->area already contains
	 * correct area to resize to */
	if (output->active)
		ivi_layout_desktop_resize(output->active, output->area);

	weston_view_set_output(view, woutput);
	weston_view_set_position(view, x, y);
	weston_layer_entry_insert(&ivi->normal.view_list, &view->layer_link);

	weston_view_update_transform(view);
	weston_view_damage_below(view);

	wsurface->is_mapped = true;
	surface->view->is_mapped = true;
}

void
ivi_layout_popup_committed(struct ivi_surface *surface)
{
	struct ivi_compositor *ivi = surface->ivi;

	struct weston_desktop_surface *dsurface = surface->dsurface;
	struct weston_surface *wsurface =
		weston_desktop_surface_get_surface(dsurface);

	struct ivi_output *output = surface->popup.output;
	struct weston_output *woutput = output->output;

	struct weston_view *view = surface->view;
	struct weston_geometry geom;

	if (surface->view->is_mapped)
		return;

	geom = weston_desktop_surface_get_geometry(dsurface);
	weston_log("geom x %d, y %d, width %d, height %d\n", geom.x, geom.y,
			geom.width, geom.height);

	assert(surface->role == IVI_SURFACE_ROLE_POPUP);

	weston_view_set_output(view, woutput);
	if (surface->popup.x || surface->popup.y)
		weston_view_set_position(view, surface->popup.x, surface->popup.y);
	else
		weston_view_set_position(view, geom.x, geom.y);
	weston_layer_entry_insert(&ivi->popup.view_list, &view->layer_link);

	weston_view_update_transform(view);
	weston_view_damage_below(view);

	wsurface->is_mapped = true;
	surface->view->is_mapped = true;
}

static void
ivi_layout_popup_re_add(struct ivi_surface *surface)
{
	assert(surface->role == IVI_SURFACE_ROLE_POPUP);
	struct weston_view *view = surface->view;

	if (weston_view_is_mapped(view)) {
		struct weston_desktop_surface *dsurface = surface->dsurface;
		struct weston_surface *wsurface =
			weston_desktop_surface_get_surface(dsurface);

		weston_layer_entry_remove(&view->layer_link);

		wsurface->is_mapped = false;
		view->is_mapped = false;
	}

	ivi_layout_popup_committed(surface);
}

void
ivi_layout_panel_committed(struct ivi_surface *surface)
{
	struct ivi_compositor *ivi = surface->ivi;
	struct ivi_output *output = surface->bg.output;
	struct weston_output *woutput = output->output;
	struct weston_desktop_surface *dsurface = surface->dsurface;
	struct weston_surface *wsurface =
		weston_desktop_surface_get_surface(dsurface);
	struct weston_geometry geom;
	int x = woutput->x;
	int y = woutput->y;

	assert(surface->role == IVI_SURFACE_ROLE_PANEL);

	/*
	 * If the desktop_surface geometry is not set and the panel is not a
	 * top one, we'll give this a chance to run, as some qtwayland version
	 * seem to have a 'problem', where the panel initilization part will
	 * have a desktop surface with 0 as geometry for *all* its members
	 * (width/height). Doing that will result in the panel not being
	 * displayed at all.
	 *
	 * Later versions of qtwayland do have the correct window geometry for
	 * the desktop surface so the weston_surface is already mapped in
	 * ivi_panel_init().
	 */
	if (wsurface->is_mapped)
		return;

	geom = weston_desktop_surface_get_geometry(dsurface);

#ifdef AGL_COMP_DEBUG
	weston_log("geom.width %d, geom.height %d, geom.x %d, geom.y %d\n",
			geom.width, geom.height, geom.x, geom.y);
#endif

	switch (surface->panel.edge) {
	case AGL_SHELL_EDGE_TOP:
		/* Do nothing */
		break;
	case AGL_SHELL_EDGE_BOTTOM:
		y += woutput->height - geom.height;
		break;
	case AGL_SHELL_EDGE_LEFT:
		/* Do nothing */
		break;
	case AGL_SHELL_EDGE_RIGHT:
		x += woutput->width - geom.width;
		break;
	}
#ifndef AGL_COMP_DEBUG
	weston_log("panel type %d commited\n", surface->panel.edge);
#endif

	weston_view_set_output(surface->view, woutput);
	weston_view_set_position(surface->view, x, y);
	weston_layer_entry_insert(&ivi->panel.view_list,
				  &surface->view->layer_link);

	weston_view_update_transform(surface->view);
	weston_view_schedule_repaint(surface->view);

	wsurface->is_mapped = true;
	surface->view->is_mapped = true;
}

static bool
ivi_layout_surface_is_split_or_fullscreen(struct ivi_surface *surf)
{
	struct ivi_compositor *ivi = surf->ivi;
	struct ivi_surface *is;

	if (surf->role != IVI_SURFACE_ROLE_SPLIT_H &&
	    surf->role != IVI_SURFACE_ROLE_SPLIT_V &&
	    surf->role != IVI_SURFACE_ROLE_FULLSCREEN)
		return false;

	wl_list_for_each(is, &ivi->surfaces, link)
		if (is == surf)
			return true;

	return false;
}

void
ivi_layout_activate(struct ivi_output *output, const char *app_id)
{
	struct ivi_compositor *ivi = output->ivi;
	struct ivi_surface *surf;
	struct weston_desktop_surface *dsurf;
	struct weston_view *view;
	struct weston_geometry geom;
	struct ivi_policy *policy = output->ivi->policy;

	surf = ivi_find_app(ivi, app_id);
	if (!surf)
		return;

	if (policy && policy->api.surface_activate &&
	    !policy->api.surface_activate(surf, surf->ivi)) {
		return;
	}

#ifdef AGL_COMP_DEBUG
	weston_log("Found app_id %s\n", app_id);
#endif

	if (surf->role == IVI_SURFACE_ROLE_POPUP) {
		ivi_layout_popup_re_add(surf);
		return;
	}

	/* do not 're'-activate surfaces that are split or active */
	if (surf == output->active ||
	    ivi_layout_surface_is_split_or_fullscreen(surf))
		return;


	dsurf = surf->dsurface;
	view = surf->view;
	geom = weston_desktop_surface_get_geometry(dsurf);

	surf->desktop.pending_output = output;
	if (weston_desktop_surface_get_maximized(dsurf) &&
	    geom.width == output->area.width &&
	    geom.height == output->area.height) {
		ivi_layout_activate_complete(output, surf);
		return;
	}

	weston_desktop_surface_set_maximized(dsurf, true);
	weston_desktop_surface_set_size(dsurf,
					output->area.width,
					output->area.height);

	/*
	 * If the view isn't mapped, we put it onto the hidden layer so it will
	 * start receiving frame events, and will be able to act on our
	 * configure event.
	 */
	if (!weston_view_is_mapped(view)) {
		view->is_mapped = true;
		view->surface->is_mapped = true;

		weston_view_set_output(view, output->output);
		weston_layer_entry_insert(&ivi->hidden.view_list, &view->layer_link);
		/* force repaint of the entire output */
		weston_output_damage(output->output);
	}
}

static struct ivi_output *
ivi_layout_get_output_from_surface(struct ivi_surface *surf)
{
	struct ivi_output *ivi_output = NULL;

	switch (surf->role) {
	case IVI_SURFACE_ROLE_DESKTOP:
		if (surf->desktop.pending_output)
			ivi_output = surf->desktop.pending_output;
		else
			ivi_output = surf->desktop.last_output;
		break;
	case IVI_SURFACE_ROLE_POPUP:
		ivi_output = surf->popup.output;
		break;
	default:
	case IVI_SURFACE_ROLE_BACKGROUND:
	case IVI_SURFACE_ROLE_PANEL:
	case IVI_SURFACE_ROLE_NONE:
		break;
	}

	return ivi_output;
}

void
ivi_layout_deactivate(struct ivi_compositor *ivi, const char *app_id)
{
	struct ivi_surface *surf;
	struct ivi_output *ivi_output;
	struct ivi_policy *policy = ivi->policy;

	surf = ivi_find_app(ivi, app_id);
	if (!surf)
		return;

	if (policy && policy->api.surface_deactivate &&
	    !policy->api.surface_deactivate(surf, surf->ivi)) {
		return;
	}

	ivi_output = ivi_layout_get_output_from_surface(surf);
	weston_log("deactiving %s\n", app_id);

	if (surf->role == IVI_SURFACE_ROLE_DESKTOP) {
		struct ivi_surface *previous_active;

		previous_active = ivi_output->previous_active;
		if (!previous_active) {
			/* we don't have a previous active it means we should
			 * display the bg */
			if (ivi_output->active) {
				struct weston_view *view;

				view = ivi_output->active->view;
				view->is_mapped = false;
				view->surface->is_mapped = false;

				weston_layer_entry_remove(&view->layer_link);
				weston_output_damage(ivi_output->output);
			}
		} else {
			struct weston_desktop_surface *dsurface;
			const char *previous_active_app_id;

			dsurface = previous_active->dsurface;
			previous_active_app_id =
				weston_desktop_surface_get_app_id(dsurface);
			ivi_layout_activate(ivi_output, previous_active_app_id);
		}
	} else if (surf->role == IVI_SURFACE_ROLE_POPUP) {
		struct weston_view *view  = surf->view;

		weston_layer_entry_remove(&view->layer_link);
		weston_view_damage_below(view);
	}
}