WIP: Atomic layout updates ground work

1 files changed, 177 insertions, 144 deletions

diff --git a/sway/tree/arrange.c b/sway/tree/arrange.c
index 721b557e..d8b3aec1 100644
--- a/sway/tree/arrange.c
+++ b/sway/tree/arrange.c
@@ -5,7 +5,6 @@
 #include <string.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_output_layout.h>
-#include "sway/debug.h"
 #include "sway/tree/arrange.h"
 #include "sway/tree/container.h"
 #include "sway/tree/layout.h"
@@ -17,116 +16,56 @@
 
 struct sway_container root_container;
 
-void arrange_root() {
-	if (config->reloading) {
-		return;
-	}
-	struct wlr_output_layout *output_layout =
-		root_container.sway_root->output_layout;
-	const struct wlr_box *layout_box =
-		wlr_output_layout_get_box(output_layout, NULL);
-	root_container.x = layout_box->x;
-	root_container.y = layout_box->y;
-	root_container.width = layout_box->width;
-	root_container.height = layout_box->height;
-	for (int i = 0; i < root_container.children->length; ++i) {
-		struct sway_container *output = root_container.children->items[i];
-		arrange_output(output);
-	}
-}
-
-void arrange_output(struct sway_container *output) {
-	if (config->reloading) {
-		return;
-	}
-	if (!sway_assert(output->type == C_OUTPUT,
-			"called arrange_output() on non-output container")) {
-		return;
-	}
-	const struct wlr_box *output_box = wlr_output_layout_get_box(
-			root_container.sway_root->output_layout,
-			output->sway_output->wlr_output);
-	output->x = output_box->x;
-	output->y = output_box->y;
-	output->width = output_box->width;
-	output->height = output_box->height;
-	wlr_log(L_DEBUG, "Arranging output '%s' at %f,%f",
-			output->name, output->x, output->y);
-	for (int i = 0; i < output->children->length; ++i) {
-		struct sway_container *workspace = output->children->items[i];
-		arrange_workspace(workspace);
-	}
-	container_damage_whole(output);
-}
-
-void arrange_workspace(struct sway_container *workspace) {
-	if (config->reloading) {
-		return;
-	}
-	if (!sway_assert(workspace->type == C_WORKSPACE,
-			"called arrange_workspace() on non-workspace container")) {
-		return;
-	}
-	struct sway_container *output = workspace->parent;
-	struct wlr_box *area = &output->sway_output->usable_area;
-	wlr_log(L_DEBUG, "Usable area for ws: %dx%d@%d,%d",
-			area->width, area->height, area->x, area->y);
-	workspace->width = area->width;
-	workspace->height = area->height;
-	workspace->x = output->x + area->x;
-	workspace->y = output->y + area->y;
-	wlr_log(L_DEBUG, "Arranging workspace '%s' at %f, %f",
-			workspace->name, workspace->x, workspace->y);
-	arrange_children_of(workspace);
-	container_damage_whole(workspace);
-}
-
 static void apply_horiz_layout(struct sway_container *parent) {
 	size_t num_children = parent->children->length;
 	if (!num_children) {
 		return;
 	}
 	size_t parent_offset = 0;
-	if (parent->parent->layout == L_TABBED) {
+	if (parent->parent->pending.layout == L_TABBED) {
 		parent_offset = container_titlebar_height();
-	} else if (parent->parent->layout == L_STACKED) {
-		parent_offset =
-			container_titlebar_height() * parent->parent->children->length;
+	} else if (parent->parent->pending.layout == L_STACKED) {
+		parent_offset = container_titlebar_height() *
+			parent->parent->children->length;
 	}
-	size_t parent_height = parent->height - parent_offset;
+	size_t parent_height = parent->pending.swayc_height - parent_offset;
 
 	// Calculate total width of children
 	double total_width = 0;
 	for (size_t i = 0; i < num_children; ++i) {
 		struct sway_container *child = parent->children->items[i];
-		if (child->width <= 0) {
+		if (child->pending.swayc_width <= 0) {
 			if (num_children > 1) {
-				child->width = parent->width / (num_children - 1);
+				child->pending.swayc_width =
+					parent->pending.swayc_width / (num_children - 1);
 			} else {
-				child->width = parent->width;
+				child->pending.swayc_width = parent->pending.swayc_width;
 			}
 		}
-		total_width += child->width;
+		total_width += child->pending.swayc_width;
 	}
-	double scale = parent->width / total_width;
+	double scale = parent->pending.swayc_width / total_width;
 
 	// Resize windows
 	wlr_log(L_DEBUG, "Arranging %p horizontally", parent);
-	double child_x = parent->x;
-	struct sway_container *child;
+	double child_x = parent->pending.swayc_x;
 	for (size_t i = 0; i < num_children; ++i) {
-		child = parent->children->items[i];
+		struct sway_container *child = parent->children->items[i];
 		wlr_log(L_DEBUG,
 				"Calculating arrangement for %p:%d (will scale %f by %f)",
-				child, child->type, child->width, scale);
-		child->x = child_x;
-		child->y = parent->y + parent_offset;
-		child->width = floor(child->width * scale);
-		child->height = parent_height;
-		child_x += child->width;
+				child, child->type, child->pending.swayc_width, scale);
+		child->pending.swayc_x = child_x;
+		child->pending.swayc_y = parent->pending.swayc_y + parent_offset;
+		child->pending.swayc_width = floor(child->pending.swayc_width * scale);
+		child->pending.swayc_height = parent_height;
+		child_x += child->pending.swayc_width;
+
+		// Make last child use remaining width of parent
+		if (i == num_children - 1) {
+			child->pending.swayc_width = parent->pending.swayc_x +
+				parent->pending.swayc_width - child->pending.swayc_x;
+		}
 	}
-	// Make last child use remaining width of parent
-	child->width = parent->x + parent->width - child->x;
 }
 
 static void apply_vert_layout(struct sway_container *parent) {
@@ -135,46 +74,51 @@ static void apply_vert_layout(struct sway_container *parent) {
 		return;
 	}
 	size_t parent_offset = 0;
-	if (parent->parent->layout == L_TABBED) {
+	if (parent->parent->pending.layout == L_TABBED) {
 		parent_offset = container_titlebar_height();
-	} else if (parent->parent->layout == L_STACKED) {
+	} else if (parent->parent->pending.layout == L_STACKED) {
 		parent_offset =
 			container_titlebar_height() * parent->parent->children->length;
 	}
-	size_t parent_height = parent->height - parent_offset;
+	size_t parent_height = parent->pending.swayc_height - parent_offset;
 
 	// Calculate total height of children
 	double total_height = 0;
 	for (size_t i = 0; i < num_children; ++i) {
 		struct sway_container *child = parent->children->items[i];
-		if (child->height <= 0) {
+		if (child->pending.swayc_height <= 0) {
 			if (num_children > 1) {
-				child->height = parent_height / (num_children - 1);
+				child->pending.swayc_height =
+					parent_height / (num_children - 1);
 			} else {
-				child->height = parent_height;
+				child->pending.swayc_height = parent_height;
 			}
 		}
-		total_height += child->height;
+		total_height += child->pending.swayc_height;
 	}
 	double scale = parent_height / total_height;
 
 	// Resize
 	wlr_log(L_DEBUG, "Arranging %p vertically", parent);
-	double child_y = parent->y + parent_offset;
-	struct sway_container *child;
+	double child_y = parent->pending.swayc_y + parent_offset;
 	for (size_t i = 0; i < num_children; ++i) {
-		child = parent->children->items[i];
+		struct sway_container *child = parent->children->items[i];
 		wlr_log(L_DEBUG,
 				"Calculating arrangement for %p:%d (will scale %f by %f)",
-				child, child->type, child->height, scale);
-		child->x = parent->x;
-		child->y = child_y;
-		child->width = parent->width;
-		child->height = floor(child->height * scale);
-		child_y += child->height;
+				child, child->type, child->pending.swayc_height, scale);
+		child->pending.swayc_x = parent->pending.swayc_x;
+		child->pending.swayc_y = child_y;
+		child->pending.swayc_width = parent->pending.swayc_width;
+		child->pending.swayc_height =
+			floor(child->pending.swayc_height * scale);
+		child_y += child->pending.swayc_height;
+
+		// Make last child use remaining height of parent
+		if (i == num_children - 1) {
+			child->pending.swayc_height = parent->pending.swayc_y +
+				parent_offset + parent_height - child->pending.swayc_y;
+		}
 	}
-	// Make last child use remaining height of parent
-	child->height = parent->y + parent_offset + parent_height - child->y;
 }
 
 static void apply_tabbed_or_stacked_layout(struct sway_container *parent) {
@@ -182,46 +126,33 @@ static void apply_tabbed_or_stacked_layout(struct sway_container *parent) {
 		return;
 	}
 	size_t parent_offset = 0;
-	if (parent->parent->layout == L_TABBED) {
+	if (parent->parent->pending.layout == L_TABBED) {
 		parent_offset = container_titlebar_height();
-	} else if (parent->parent->layout == L_STACKED) {
+	} else if (parent->parent->pending.layout == L_STACKED) {
 		parent_offset =
 			container_titlebar_height() * parent->parent->children->length;
 	}
-	size_t parent_height = parent->height - parent_offset;
+	size_t parent_height = parent->pending.swayc_height - parent_offset;
 	for (int i = 0; i < parent->children->length; ++i) {
 		struct sway_container *child = parent->children->items[i];
-		child->x = parent->x;
-		child->y = parent->y + parent_offset;
-		child->width = parent->width;
-		child->height = parent_height;
+		child->pending.swayc_x = parent->pending.swayc_x;
+		child->pending.swayc_y = parent->pending.swayc_y + parent_offset;
+		child->pending.swayc_width = parent->pending.swayc_width;
+		child->pending.swayc_height = parent_height;
 	}
 }
 
-void arrange_children_of(struct sway_container *parent) {
+static void _arrange_children_of(struct sway_container *parent,
+		struct sway_transaction *transaction) {
 	if (config->reloading) {
 		return;
 	}
-	if (!sway_assert(parent->type == C_WORKSPACE || parent->type == C_CONTAINER,
-			"container is a %s", container_type_to_str(parent->type))) {
-		return;
-	}
-
-	struct sway_container *workspace = parent;
-	if (workspace->type != C_WORKSPACE) {
-		workspace = container_parent(workspace, C_WORKSPACE);
-	}
-	if (workspace->sway_workspace->fullscreen) {
-		// Just arrange the fullscreen view and jump out
-		view_autoconfigure(workspace->sway_workspace->fullscreen);
-		return;
-	}
-
 	wlr_log(L_DEBUG, "Arranging layout for %p %s %fx%f+%f,%f", parent,
-		parent->name, parent->width, parent->height, parent->x, parent->y);
+		parent->name, parent->pending.swayc_width, parent->pending.swayc_height,
+		parent->pending.swayc_x, parent->pending.swayc_y);
 
 	// Calculate x, y, width and height of children
-	switch (parent->layout) {
+	switch (parent->pending.layout) {
 	case L_HORIZ:
 		apply_horiz_layout(parent);
 		break;
@@ -232,33 +163,135 @@ void arrange_children_of(struct sway_container *parent) {
 	case L_STACKED:
 		apply_tabbed_or_stacked_layout(parent);
 		break;
-	default:
-		wlr_log(L_DEBUG, "TODO: arrange layout type %d", parent->layout);
+	case L_NONE:
 		apply_horiz_layout(parent);
 		break;
+	case L_FLOATING:
+		sway_assert(false, "Didn't expect to see floating here");
 	}
 
-	// Apply x, y, width and height to children and recurse if needed
+	// Recurse into child containers
 	for (int i = 0; i < parent->children->length; ++i) {
 		struct sway_container *child = parent->children->items[i];
 		if (child->type == C_VIEW) {
 			view_autoconfigure(child->sway_view);
 		} else {
-			arrange_children_of(child);
+			_arrange_children_of(child, transaction);
 		}
+		transaction_add_container(transaction, child);
 	}
+}
 
-	// If container is a workspace, process floating containers too
-	if (parent->type == C_WORKSPACE) {
-		struct sway_workspace *ws = workspace->sway_workspace;
-		for (int i = 0; i < ws->floating->children->length; ++i) {
-			struct sway_container *child = ws->floating->children->items[i];
-			if (child->type != C_VIEW) {
-				arrange_children_of(child);
-			}
-		}
+static void _arrange_workspace(struct sway_container *workspace,
+		struct sway_transaction *transaction) {
+	if (config->reloading) {
+		return;
+	}
+	struct sway_container *output = workspace->parent;
+	struct wlr_box *area = &output->sway_output->usable_area;
+	wlr_log(L_DEBUG, "Usable area for ws: %dx%d@%d,%d",
+			area->width, area->height, area->x, area->y);
+	workspace->pending.swayc_width = area->width;
+	workspace->pending.swayc_height = area->height;
+	workspace->pending.swayc_x = output->x + area->x;
+	workspace->pending.swayc_y = output->y + area->y;
+	transaction_add_container(transaction, workspace);
+	wlr_log(L_DEBUG, "Arranging workspace '%s' at %f, %f", workspace->name,
+			workspace->pending.swayc_x, workspace->pending.swayc_y);
+	_arrange_children_of(workspace, transaction);
+}
+
+static void _arrange_output(struct sway_container *output,
+		struct sway_transaction *transaction) {
+	if (config->reloading) {
+		return;
+	}
+	const struct wlr_box *output_box = wlr_output_layout_get_box(
+			root_container.sway_root->output_layout,
+			output->sway_output->wlr_output);
+	output->x = output_box->x;
+	output->y = output_box->y;
+	output->width = output_box->width;
+	output->height = output_box->height;
+	output->pending.swayc_x = output_box->x;
+	output->pending.swayc_y = output_box->y;
+	output->pending.swayc_width = output_box->width;
+	output->pending.swayc_height = output_box->height;
+	transaction_add_container(transaction, output);
+	wlr_log(L_DEBUG, "Arranging output '%s' at %f,%f",
+			output->name, output->pending.swayc_x, output->pending.swayc_y);
+	for (int i = 0; i < output->children->length; ++i) {
+		struct sway_container *workspace = output->children->items[i];
+		_arrange_workspace(workspace, transaction);
+	}
+}
+
+static void _arrange_root(struct sway_transaction *transaction) {
+	if (config->reloading) {
+		return;
 	}
+	struct wlr_output_layout *output_layout =
+		root_container.sway_root->output_layout;
+	const struct wlr_box *layout_box =
+		wlr_output_layout_get_box(output_layout, NULL);
+	root_container.x = layout_box->x;
+	root_container.y = layout_box->y;
+	root_container.width = layout_box->width;
+	root_container.height = layout_box->height;
+	root_container.pending.swayc_x = layout_box->x;
+	root_container.pending.swayc_y = layout_box->y;
+	root_container.pending.swayc_width = layout_box->width;
+	root_container.pending.swayc_height = layout_box->height;
+	transaction_add_container(transaction, &root_container);
+	for (int i = 0; i < root_container.children->length; ++i) {
+		struct sway_container *output = root_container.children->items[i];
+		_arrange_output(output, transaction);
+	}
+}
+
+void arrange_windows(struct sway_container *container,
+		struct sway_transaction *transaction) {
+	switch (container->type) {
+	case C_ROOT:
+		_arrange_root(transaction);
+		break;
+	case C_OUTPUT:
+		_arrange_output(container, transaction);
+		break;
+	case C_WORKSPACE:
+		_arrange_workspace(container, transaction);
+		break;
+	case C_CONTAINER:
+		_arrange_children_of(container, transaction);
+		transaction_add_container(transaction, container);
+		break;
+	case C_VIEW:
+		break;
+	case C_TYPES:
+		break;
+	}
+	transaction_add_damage(transaction, container_get_box(container));
+}
+
+void arrange_and_commit(struct sway_container *container) {
+	struct sway_transaction *transaction = transaction_create();
+	arrange_windows(container, transaction);
+	transaction_commit(transaction);
+}
+
+// These functions are only temporary
+void arrange_root() {
+	arrange_and_commit(&root_container);
+}
+
+void arrange_output(struct sway_container *container) {
+	arrange_and_commit(container);
+}
+
+void arrange_workspace(struct sway_container *container) {
+	arrange_and_commit(container);
+}
 
-	container_damage_whole(parent);
-	update_debug_tree();
+void arrange_children_of(struct sway_container *container) {
+	arrange_and_commit(container);
 }