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);
 }