Adopt shorter identifiers

Also, slightly reformat the source code according to clang-format.

1 files changed, 0 insertions, 1069 deletions

diff --git a/fastiv-browser.c b/fastiv-browser.c
deleted file mode 100644
index 78607ed..0000000
--- a/fastiv-browser.c
+++ /dev/null
@@ -1,1069 +0,0 @@
-//
-// fastiv-browser.c: fast image viewer - filesystem browser widget
-//
-// Copyright (c) 2021, Přemysl Eric Janouch <p@janouch.name>
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
-// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
-// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-
-#include <math.h>
-#include <pixman.h>
-
-#include "fastiv-browser.h"
-#include "fastiv-io.h"
-#include "fastiv-view.h"
-
-// --- Widget ------------------------------------------------------------------
-//                     _________________________________
-//                    │    p   a   d   d   i   n   g
-//                    │ p ╭───────────────────╮ s ╭┄┄┄┄┄
-//                    │ a │ glow border   ┊   │ p ┊
-//                    │ d │ ┄ ╔═══════════╗ ┄ │ a ┊
-//                    │ d │   ║ thumbnail ║   │ c ┊ ...
-//                    │ i │ ┄ ╚═══════════╝ ┄ │ i ┊
-//                    │ n │   ┊   glow border │ n ┊
-//                    │ g ╰───────────────────╯ g ╰┄┄┄┄┄
-//                    │    s  p  a  c  i  n  g
-//                    │   ╭┄┄┄┄┄┄┄┄┄┄┄┄╮   ╭┄┄┄┄┄┄┄┄┄┄┄┄
-//
-// The glow is actually a glowing margin, the border is rendered in two parts.
-//
-
-struct _FastivBrowser {
-	GtkWidget parent_instance;
-
-	FastivIoThumbnailSize item_size;    ///< Thumbnail size
-	int item_height;                    ///< Thumbnail height in pixels
-	int item_spacing;                   ///< Space between items in pixels
-
-	GArray *entries;                    ///< [Entry]
-	GArray *layouted_rows;              ///< [Row]
-	int selected;
-
-	GdkCursor *pointer;                 ///< Cached pointer cursor
-	cairo_surface_t *glow;              ///< CAIRO_FORMAT_A8 mask
-	int item_border_x;                  ///< L/R .item margin + border
-	int item_border_y;                  ///< T/B .item margin + border
-};
-
-typedef struct entry Entry;
-typedef struct item Item;
-typedef struct row Row;
-
-static const double g_permitted_width_multiplier = 2;
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-struct entry {
-	char *uri;                          ///< GIO URI
-	cairo_surface_t *thumbnail;         ///< Prescaled thumbnail
-	GIcon *icon;                        ///< If no thumbnail, use this icon
-};
-
-static void
-entry_free(Entry *self)
-{
-	g_free(self->uri);
-	g_clear_pointer(&self->thumbnail, cairo_surface_destroy);
-	g_clear_object(&self->icon);
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-struct item {
-	const Entry *entry;
-	int x_offset;                       ///< Offset within the row
-};
-
-struct row {
-	Item *items;                        ///< Ends with a NULL entry
-	int x_offset;                       ///< Start position outside borders
-	int y_offset;                       ///< Start position inside borders
-};
-
-static void
-row_free(Row *self)
-{
-	g_free(self->items);
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-static void
-append_row(FastivBrowser *self, int *y, int x, GArray *items_array)
-{
-	if (self->layouted_rows->len)
-		*y += self->item_spacing;
-
-	*y += self->item_border_y;
-	g_array_append_val(self->layouted_rows, ((Row) {
-		.items = g_array_steal(items_array, NULL),
-		.x_offset = x,
-		.y_offset = *y,
-	}));
-
-	// Not trying to pack them vertically, but this would be the place to do it.
-	*y += self->item_height;
-	*y += self->item_border_y;
-}
-
-static int
-relayout(FastivBrowser *self, int width)
-{
-	GtkWidget *widget = GTK_WIDGET(self);
-	GtkStyleContext *style = gtk_widget_get_style_context(widget);
-
-	GtkBorder padding = {};
-	gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
-	int available_width = width - padding.left - padding.right;
-
-	g_array_set_size(self->layouted_rows, 0);
-
-	GArray *items = g_array_new(TRUE, TRUE, sizeof(Item));
-	int x = 0, y = padding.top;
-	for (guint i = 0; i < self->entries->len; i++) {
-		const Entry *entry = &g_array_index(self->entries, Entry, i);
-		if (!entry->thumbnail)
-			continue;
-
-		int width = cairo_image_surface_get_width(entry->thumbnail) +
-			2 * self->item_border_x;
-		if (!items->len) {
-			// Just insert it, whether or not there's any space.
-		} else if (x + self->item_spacing + width <= available_width) {
-			x += self->item_spacing;
-		} else {
-			append_row(self, &y,
-				padding.left + MAX(0, available_width - x) / 2, items);
-			x = 0;
-		}
-
-		g_array_append_val(items,
-			((Item) {.entry = entry, .x_offset = x + self->item_border_x}));
-		x += width;
-	}
-	if (items->len) {
-		append_row(self, &y,
-			padding.left + MAX(0, available_width - x) / 2, items);
-	}
-
-	g_array_free(items, TRUE);
-	return y + padding.bottom;
-}
-
-static void
-draw_outer_border(FastivBrowser *self, cairo_t *cr, int width, int height)
-{
-	int offset_x = cairo_image_surface_get_width(self->glow);
-	int offset_y = cairo_image_surface_get_height(self->glow);
-	cairo_pattern_t *mask = cairo_pattern_create_for_surface(self->glow);
-	cairo_matrix_t matrix;
-
-	cairo_pattern_set_extend(mask, CAIRO_EXTEND_PAD);
-	cairo_save(cr);
-	cairo_translate(cr, -offset_x, -offset_y);
-	cairo_rectangle(cr, 0, 0, offset_x + width, offset_y + height);
-	cairo_clip(cr);
-	cairo_mask(cr, mask);
-	cairo_restore(cr);
-	cairo_save(cr);
-	cairo_translate(cr, width + offset_x, height + offset_y);
-	cairo_rectangle(cr, 0, 0, -offset_x - width, -offset_y - height);
-	cairo_clip(cr);
-	cairo_scale(cr, -1, -1);
-	cairo_mask(cr, mask);
-	cairo_restore(cr);
-
-	cairo_pattern_set_extend(mask, CAIRO_EXTEND_NONE);
-	cairo_matrix_init_scale(&matrix, -1, 1);
-	cairo_matrix_translate(&matrix, -width - offset_x, offset_y);
-	cairo_pattern_set_matrix(mask, &matrix);
-	cairo_mask(cr, mask);
-	cairo_matrix_init_scale(&matrix, 1, -1);
-	cairo_matrix_translate(&matrix, offset_x, -height - offset_y);
-	cairo_pattern_set_matrix(mask, &matrix);
-	cairo_mask(cr, mask);
-
-	cairo_pattern_destroy(mask);
-}
-
-static GdkRectangle
-item_extents(FastivBrowser *self, const Item *item, const Row *row)
-{
-	int width = cairo_image_surface_get_width(item->entry->thumbnail);
-	int height = cairo_image_surface_get_height(item->entry->thumbnail);
-	return (GdkRectangle) {
-		.x = row->x_offset + item->x_offset,
-		.y = row->y_offset + self->item_height - height,
-		.width = width,
-		.height = height,
-	};
-}
-
-static const Entry *
-entry_at(FastivBrowser *self, int x, int y)
-{
-	for (guint i = 0; i < self->layouted_rows->len; i++) {
-		const Row *row = &g_array_index(self->layouted_rows, Row, i);
-		for (Item *item = row->items; item->entry; item++) {
-			GdkRectangle extents = item_extents(self, item, row);
-			if (x >= extents.x &&
-				y >= extents.y &&
-				x <= extents.x + extents.width &&
-				y <= extents.y + extents.height)
-				return item->entry;
-		}
-	}
-	return NULL;
-}
-
-static void
-draw_row(FastivBrowser *self, cairo_t *cr, const Row *row)
-{
-	GtkStyleContext *style = gtk_widget_get_style_context(GTK_WIDGET(self));
-	gtk_style_context_save(style);
-	gtk_style_context_add_class(style, "item");
-
-	GdkRGBA glow_color = {};
-	GtkStateFlags state = gtk_style_context_get_state (style);
-	gtk_style_context_get_color(style, state, &glow_color);
-
-	GtkBorder border;
-	gtk_style_context_get_border(style, state, &border);
-	for (Item *item = row->items; item->entry; item++) {
-		cairo_save(cr);
-		GdkRectangle extents = item_extents(self, item, row);
-		cairo_translate(cr, extents.x - border.left, extents.y - border.top);
-
-		gtk_style_context_save(style);
-		if (item->entry->icon) {
-			gtk_style_context_add_class(style, "symbolic");
-		} else {
-			gdk_cairo_set_source_rgba(cr, &glow_color);
-			draw_outer_border(self, cr,
-				border.left + extents.width + border.right,
-				border.top + extents.height + border.bottom);
-		}
-
-		gtk_render_background(
-			style, cr, border.left, border.top, extents.width, extents.height);
-
-		gtk_render_frame(style, cr, 0, 0,
-			border.left + extents.width + border.right,
-			border.top + extents.height + border.bottom);
-
-		if (item->entry->icon) {
-			GdkRGBA color = {};
-			gtk_style_context_get_color(style, state, &color);
-			gdk_cairo_set_source_rgba(cr, &color);
-			cairo_mask_surface(
-				cr, item->entry->thumbnail, border.left, border.top);
-		} else {
-			cairo_set_source_surface(
-				cr, item->entry->thumbnail, border.left, border.top);
-			cairo_paint(cr);
-		}
-
-		cairo_restore(cr);
-		gtk_style_context_restore(style);
-	}
-	gtk_style_context_restore(style);
-}
-
-// --- Thumbnails --------------------------------------------------------------
-
-// NOTE: "It is important to note that when an image with an alpha channel is
-// scaled, linear encoded, pre-multiplied component values must be used!"
-static cairo_surface_t *
-rescale_thumbnail(cairo_surface_t *thumbnail, double row_height)
-{
-	if (!thumbnail)
-		return thumbnail;
-
-	int width = cairo_image_surface_get_width(thumbnail);
-	int height = cairo_image_surface_get_height(thumbnail);
-
-	double scale_x = 1;
-	double scale_y = 1;
-	if (width > g_permitted_width_multiplier * height) {
-		scale_x = g_permitted_width_multiplier * row_height / width;
-		scale_y = round(scale_x * height) / height;
-	} else {
-		scale_y = row_height / height;
-		scale_x = round(scale_y * width) / width;
-	}
-	if (scale_x == 1 && scale_y == 1)
-		return thumbnail;
-
-	int projected_width = round(scale_x * width);
-	int projected_height = round(scale_y * height);
-	cairo_surface_t *scaled = cairo_image_surface_create(
-		CAIRO_FORMAT_ARGB32, projected_width, projected_height);
-
-	// pixman can take gamma into account when scaling, unlike Cairo.
-	struct pixman_f_transform xform_floating;
-	struct pixman_transform xform;
-
-	// PIXMAN_a8r8g8b8_sRGB can be used for gamma-correct results,
-	// but it's an incredibly slow transformation
-	pixman_format_code_t format = PIXMAN_a8r8g8b8;
-
-	pixman_image_t *src = pixman_image_create_bits(format, width, height,
-		(uint32_t *) cairo_image_surface_get_data(thumbnail),
-		cairo_image_surface_get_stride(thumbnail));
-	pixman_image_t *dest = pixman_image_create_bits(format,
-		cairo_image_surface_get_width(scaled),
-		cairo_image_surface_get_height(scaled),
-		(uint32_t *) cairo_image_surface_get_data(scaled),
-		cairo_image_surface_get_stride(scaled));
-
-	pixman_f_transform_init_scale(&xform_floating, scale_x, scale_y);
-	pixman_f_transform_invert(&xform_floating, &xform_floating);
-	pixman_transform_from_pixman_f_transform(&xform, &xform_floating);
-	pixman_image_set_transform(src, &xform);
-	pixman_image_set_filter(src, PIXMAN_FILTER_BILINEAR, NULL, 0);
-	pixman_image_set_repeat(src, PIXMAN_REPEAT_PAD);
-
-	pixman_image_composite(PIXMAN_OP_SRC, src, NULL, dest, 0, 0, 0, 0, 0, 0,
-		projected_width, projected_height);
-	pixman_image_unref(src);
-	pixman_image_unref(dest);
-
-	cairo_surface_destroy(thumbnail);
-	cairo_surface_mark_dirty(scaled);
-	return scaled;
-}
-
-static void
-entry_add_thumbnail(gpointer data, gpointer user_data)
-{
-	Entry *self = data;
-	g_clear_object(&self->icon);
-	g_clear_pointer(&self->thumbnail, cairo_surface_destroy);
-
-	FastivBrowser *browser = FASTIV_BROWSER(user_data);
-	GFile *file = g_file_new_for_uri(self->uri);
-	self->thumbnail = rescale_thumbnail(
-		fastiv_io_lookup_thumbnail(file, browser->item_size),
-		browser->item_height);
-	if (self->thumbnail)
-		goto out;
-
-	// Fall back to symbolic icons, though there's only so much we can do
-	// in parallel--GTK+ isn't thread-safe.
-	GFileInfo *info = g_file_query_info(file,
-		G_FILE_ATTRIBUTE_STANDARD_NAME
-		"," G_FILE_ATTRIBUTE_STANDARD_SYMBOLIC_ICON,
-		G_FILE_QUERY_INFO_NONE, NULL, NULL);
-	if (info) {
-		GIcon *icon = g_file_info_get_symbolic_icon(info);
-		if (icon)
-			self->icon = g_object_ref(icon);
-		g_object_unref(info);
-	}
-out:
-	g_object_unref(file);
-}
-
-static void
-materialize_icon(FastivBrowser *self, Entry *entry)
-{
-	if (!entry->icon)
-		return;
-
-	// Fucker will still give us non-symbolic icons, no more playing nice.
-	// TODO(p): Investigate a bit closer. We may want to abandon the idea
-	// of using GLib to look up icons for us, derive a list from a guessed
-	// MIME type, with "-symbolic" prefixes and fallbacks,
-	// and use gtk_icon_theme_choose_icon() instead.
-	// TODO(p): Make sure we have /some/ icon for every entry.
-	// TODO(p): We might want to populate these on an as-needed basis.
-	GtkIconInfo *icon_info = gtk_icon_theme_lookup_by_gicon(
-		gtk_icon_theme_get_default(), entry->icon, self->item_height / 2,
-		GTK_ICON_LOOKUP_FORCE_SYMBOLIC);
-	if (!icon_info)
-		return;
-
-	// Bílá, bílá, bílá, bílá... komu by se nelíbí-lá...
-	// We do not want any highlights, nor do we want to remember the style.
-	const GdkRGBA white = {1, 1, 1, 1};
-	GdkPixbuf *pixbuf = gtk_icon_info_load_symbolic(
-		icon_info, &white, &white, &white, &white, NULL, NULL);
-	if (pixbuf) {
-		int outer_size = self->item_height;
-		entry->thumbnail =
-			cairo_image_surface_create(CAIRO_FORMAT_A8, outer_size, outer_size);
-
-		// "Note that the resulting pixbuf may not be exactly this size;"
-		// though GTK_ICON_LOOKUP_FORCE_SIZE is also an option.
-		int x = (outer_size - gdk_pixbuf_get_width(pixbuf)) / 2;
-		int y = (outer_size - gdk_pixbuf_get_height(pixbuf)) / 2;
-
-		cairo_t *cr = cairo_create(entry->thumbnail);
-		gdk_cairo_set_source_pixbuf(cr, pixbuf, x, y);
-		cairo_paint(cr);
-		cairo_destroy(cr);
-
-		g_object_unref(pixbuf);
-	}
-	g_object_unref(icon_info);
-}
-
-static void
-reload_thumbnails(FastivBrowser *self)
-{
-	GThreadPool *pool = g_thread_pool_new(
-		entry_add_thumbnail, self, g_get_num_processors(), FALSE, NULL);
-	for (guint i = 0; i < self->entries->len; i++)
-		g_thread_pool_push(pool, &g_array_index(self->entries, Entry, i), NULL);
-	g_thread_pool_free(pool, FALSE, TRUE);
-
-	for (guint i = 0; i < self->entries->len; i++)
-		materialize_icon(self, &g_array_index(self->entries, Entry, i));
-
-	gtk_widget_queue_resize(GTK_WIDGET(self));
-}
-
-// --- Context menu-------------------------------------------------------------
-
-typedef struct _OpenContext {
-	GWeakRef widget;
-	GFile *file;
-	char *content_type;
-	GAppInfo *app_info;
-} OpenContext;
-
-static void
-open_context_notify(gpointer data, G_GNUC_UNUSED GClosure *closure)
-{
-	OpenContext *self = data;
-	g_weak_ref_clear(&self->widget);
-	g_clear_object(&self->app_info);
-	g_clear_object(&self->file);
-	g_free(self->content_type);
-	g_free(self);
-}
-
-static void
-open_context_launch(GtkWidget *widget, OpenContext *self)
-{
-	GdkAppLaunchContext *context =
-		gdk_display_get_app_launch_context(gtk_widget_get_display(widget));
-	gdk_app_launch_context_set_screen(context, gtk_widget_get_screen(widget));
-	gdk_app_launch_context_set_timestamp(context, gtk_get_current_event_time());
-
-	// TODO(p): Display errors.
-	GList *files = g_list_append(NULL, self->file);
-	if (g_app_info_launch(
-			self->app_info, files, G_APP_LAUNCH_CONTEXT(context), NULL)) {
-		g_app_info_set_as_last_used_for_type(
-			self->app_info, self->content_type, NULL);
-	}
-	g_list_free(files);
-	g_object_unref(context);
-}
-
-static void
-append_opener(GtkWidget *menu, GAppInfo *opener, const OpenContext *template)
-{
-	OpenContext *ctx = g_malloc0(sizeof *ctx);
-	g_weak_ref_init(&ctx->widget, NULL);
-	ctx->file = g_object_ref(template->file);
-	ctx->content_type = g_strdup(template->content_type);
-	ctx->app_info = opener;
-
-	// It's documented that we can touch the child, if we want formatting:
-	// https://docs.gtk.org/gtk3/class.MenuItem.html
-	// XXX: Would g_app_info_get_display_name() be any better?
-	gchar *name = g_strdup_printf("Open With %s", g_app_info_get_name(opener));
-	GtkWidget *item = gtk_menu_item_new_with_label(name);
-	g_free(name);
-	g_signal_connect_data(item, "activate", G_CALLBACK(open_context_launch),
-		ctx, open_context_notify, 0);
-	gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
-}
-
-static void
-on_chooser_activate(GtkMenuItem *item, gpointer user_data)
-{
-	OpenContext *ctx = user_data;
-	GtkWindow *window = NULL;
-	GtkWidget *widget = g_weak_ref_get(&ctx->widget);
-	if (widget) {
-		if (GTK_IS_WINDOW((widget = gtk_widget_get_toplevel(widget))))
-			window = GTK_WINDOW(widget);
-	}
-
-	GtkWidget *dialog = gtk_app_chooser_dialog_new_for_content_type(window,
-		GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_MODAL, ctx->content_type);
-	if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK) {
-		ctx->app_info = gtk_app_chooser_get_app_info(GTK_APP_CHOOSER(dialog));
-		open_context_launch(GTK_WIDGET(item), ctx);
-	}
-	gtk_widget_destroy(dialog);
-}
-
-static gboolean
-destroy_widget_idle_source_func(GtkWidget *widget)
-{
-	// The whole menu is deactivated /before/ any item is activated,
-	// and a destroyed child item will not activate.
-	gtk_widget_destroy(widget);
-	return FALSE;
-}
-
-static void
-show_context_menu(GtkWidget *widget, const char *uri)
-{
-	GFile *file = g_file_new_for_uri(uri);
-	GFileInfo *info = g_file_query_info(file,
-		G_FILE_ATTRIBUTE_STANDARD_NAME
-		"," G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
-		G_FILE_QUERY_INFO_NONE, NULL, NULL);
-	if (!info) {
-		g_object_unref(file);
-		return;
-	}
-
-	// This will have no application pre-assigned, for use with GTK+'s dialog.
-	OpenContext *ctx = g_malloc0(sizeof *ctx);
-	g_weak_ref_init(&ctx->widget, widget);
-	ctx->file = file;
-	ctx->content_type = g_strdup(g_file_info_get_content_type(info));
-	g_object_unref(info);
-
-	GAppInfo *default_ =
-		g_app_info_get_default_for_type(ctx->content_type, FALSE);
-	GList *recommended = g_app_info_get_recommended_for_type(ctx->content_type);
-	GList *fallback = g_app_info_get_fallback_for_type(ctx->content_type);
-
-	GtkWidget *menu = gtk_menu_new();
-	if (default_) {
-		append_opener(menu, default_, ctx);
-		gtk_menu_shell_append(
-			GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
-	}
-
-	for (GList *iter = recommended; iter; iter = iter->next) {
-		if (g_app_info_should_show(iter->data) &&
-			(!default_ || !g_app_info_equal(iter->data, default_)))
-			append_opener(menu, iter->data, ctx);
-		else
-			g_object_unref(iter->data);
-	}
-	if (recommended) {
-		g_list_free(recommended);
-		gtk_menu_shell_append(
-			GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
-	}
-
-	for (GList *iter = fallback; iter; iter = iter->next) {
-		if (g_app_info_should_show(iter->data) &&
-			(!default_ || !g_app_info_equal(iter->data, default_)))
-			append_opener(menu, iter->data, ctx);
-		else
-			g_object_unref(iter->data);
-	}
-	if (fallback) {
-		g_list_free(fallback);
-		gtk_menu_shell_append(
-			GTK_MENU_SHELL(menu), gtk_separator_menu_item_new());
-	}
-
-	GtkWidget *item = gtk_menu_item_new_with_label("Open With...");
-	g_signal_connect_data(item, "activate", G_CALLBACK(on_chooser_activate),
-		ctx, open_context_notify, 0);
-	gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
-
-	// As per GTK+ 3 Common Questions, 1.5.
-	g_object_ref_sink(menu);
-	g_signal_connect_swapped(menu, "deactivate",
-		G_CALLBACK(g_idle_add), destroy_widget_idle_source_func);
-	g_signal_connect(menu, "destroy", G_CALLBACK(g_object_unref), NULL);
-
-	gtk_widget_show_all(menu);
-	gtk_menu_popup_at_pointer(GTK_MENU(menu), NULL);
-}
-
-// --- Boilerplate -------------------------------------------------------------
-
-// TODO(p): For proper navigation, we need to implement GtkScrollable.
-G_DEFINE_TYPE_EXTENDED(FastivBrowser, fastiv_browser, GTK_TYPE_WIDGET, 0,
-	/* G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE,
-		fastiv_browser_scrollable_init) */)
-
-enum {
-	PROP_THUMBNAIL_SIZE = 1,
-	N_PROPERTIES
-};
-
-static GParamSpec *browser_properties[N_PROPERTIES];
-
-enum {
-	ITEM_ACTIVATED,
-	LAST_SIGNAL,
-};
-
-// Globals are, sadly, the canonical way of storing signal numbers.
-static guint browser_signals[LAST_SIGNAL];
-
-static void
-fastiv_browser_finalize(GObject *gobject)
-{
-	FastivBrowser *self = FASTIV_BROWSER(gobject);
-	g_array_free(self->entries, TRUE);
-	g_array_free(self->layouted_rows, TRUE);
-	cairo_surface_destroy(self->glow);
-	g_clear_object(&self->pointer);
-
-	G_OBJECT_CLASS(fastiv_browser_parent_class)->finalize(gobject);
-}
-
-static void
-fastiv_browser_get_property(
-	GObject *object, guint property_id, GValue *value, GParamSpec *pspec)
-{
-	FastivBrowser *self = FASTIV_BROWSER(object);
-	switch (property_id) {
-	case PROP_THUMBNAIL_SIZE:
-		g_value_set_enum(value, self->item_size);
-		break;
-	default:
-		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
-	}
-}
-
-static void
-set_item_size(FastivBrowser *self, FastivIoThumbnailSize size)
-{
-	if (size < FASTIV_IO_THUMBNAIL_SIZE_MIN ||
-		size > FASTIV_IO_THUMBNAIL_SIZE_MAX)
-		return;
-
-	if (size != self->item_size) {
-		self->item_size = size;
-		self->item_height = fastiv_io_thumbnail_sizes[self->item_size].size;
-		reload_thumbnails(self);
-
-		g_object_notify_by_pspec(
-			G_OBJECT(self), browser_properties[PROP_THUMBNAIL_SIZE]);
-	}
-}
-
-static void
-fastiv_browser_set_property(
-	GObject *object, guint property_id, const GValue *value, GParamSpec *pspec)
-{
-	FastivBrowser *self = FASTIV_BROWSER(object);
-	switch (property_id) {
-	case PROP_THUMBNAIL_SIZE:
-		set_item_size(self, g_value_get_enum(value));
-		break;
-	default:
-		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
-	}
-}
-
-static GtkSizeRequestMode
-fastiv_browser_get_request_mode(G_GNUC_UNUSED GtkWidget *widget)
-{
-	return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
-}
-
-static void
-fastiv_browser_get_preferred_width(
-	GtkWidget *widget, gint *minimum, gint *natural)
-{
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	GtkStyleContext *style = gtk_widget_get_style_context(widget);
-
-	GtkBorder padding = {};
-	gtk_style_context_get_padding(style, GTK_STATE_FLAG_NORMAL, &padding);
-	*minimum = *natural =
-		g_permitted_width_multiplier * self->item_height +
-		padding.left + 2 * self->item_border_x + padding.right;
-}
-
-static void
-fastiv_browser_get_preferred_height_for_width(
-	GtkWidget *widget, gint width, gint *minimum, gint *natural)
-{
-	// XXX: This is rather ugly, the caller is only asking.
-	*minimum = *natural = relayout(FASTIV_BROWSER(widget), width);
-}
-
-static void
-fastiv_browser_realize(GtkWidget *widget)
-{
-	GtkAllocation allocation;
-	gtk_widget_get_allocation(widget, &allocation);
-
-	GdkWindowAttr attributes = {
-		.window_type = GDK_WINDOW_CHILD,
-		.x = allocation.x,
-		.y = allocation.y,
-		.width = allocation.width,
-		.height = allocation.height,
-
-		// Input-only would presumably also work (as in GtkPathBar, e.g.),
-		// but it merely seems to involve more work.
-		.wclass = GDK_INPUT_OUTPUT,
-
-		.visual = gtk_widget_get_visual(widget),
-		.event_mask = gtk_widget_get_events(widget) | GDK_KEY_PRESS_MASK |
-			GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
-			GDK_SCROLL_MASK,
-	};
-
-	// We need this window to receive input events at all.
-	// TODO(p): See if input events bubble up to parents.
-	GdkWindow *window = gdk_window_new(gtk_widget_get_parent_window(widget),
-		&attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL);
-	gtk_widget_register_window(widget, window);
-	gtk_widget_set_window(widget, window);
-	gtk_widget_set_realized(widget, TRUE);
-
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	g_clear_object(&self->pointer);
-	self->pointer =
-		gdk_cursor_new_from_name(gdk_window_get_display(window), "pointer");
-}
-
-static void
-fastiv_browser_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
-{
-	GTK_WIDGET_CLASS(fastiv_browser_parent_class)
-		->size_allocate(widget, allocation);
-
-	relayout(FASTIV_BROWSER(widget), allocation->width);
-}
-
-static gboolean
-fastiv_browser_draw(GtkWidget *widget, cairo_t *cr)
-{
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	if (!gtk_cairo_should_draw_window(cr, gtk_widget_get_window(widget)))
-		return TRUE;
-
-	GtkAllocation allocation;
-	gtk_widget_get_allocation(widget, &allocation);
-	gtk_render_background(gtk_widget_get_style_context(widget), cr, 0, 0,
-		allocation.width, allocation.height);
-
-	GdkRectangle clip = {};
-	gboolean have_clip = gdk_cairo_get_clip_rectangle(cr, &clip);
-
-	for (guint i = 0; i < self->layouted_rows->len; i++) {
-		const Row *row = &g_array_index(self->layouted_rows, Row, i);
-		GdkRectangle extents = {
-			.x = 0,
-			.y = row->y_offset - self->item_border_y,
-			.width = allocation.width,
-			.height = self->item_height + 2 * self->item_border_y,
-		};
-		if (!have_clip || gdk_rectangle_intersect(&clip, &extents, NULL))
-			draw_row(self, cr, row);
-	}
-	return TRUE;
-}
-
-static gboolean
-open_entry(GtkWidget *self, const Entry *entry, gboolean new_window)
-{
-	GFile *location = g_file_new_for_uri(entry->uri);
-	g_signal_emit(self, browser_signals[ITEM_ACTIVATED], 0, location,
-		new_window ? GTK_PLACES_OPEN_NEW_WINDOW : GTK_PLACES_OPEN_NORMAL);
-	g_object_unref(location);
-	return TRUE;
-}
-
-static gboolean
-fastiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event)
-{
-	GTK_WIDGET_CLASS(fastiv_browser_parent_class)
-		->button_press_event(widget, event);
-
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	if (event->type != GDK_BUTTON_PRESS)
-		return FALSE;
-
-	guint state = event->state & gtk_accelerator_get_default_mod_mask();
-	if (event->button == GDK_BUTTON_PRIMARY && state == 0 &&
-		gtk_widget_get_focus_on_click(widget))
-		gtk_widget_grab_focus(widget);
-
-	const Entry *entry = entry_at(self, event->x, event->y);
-	if (!entry)
-		return FALSE;
-
-	switch (event->button) {
-	case GDK_BUTTON_PRIMARY:
-		if (state == 0)
-			return open_entry(widget, entry, FALSE);
-		if (state == GDK_CONTROL_MASK)
-			return open_entry(widget, entry, TRUE);
-		return FALSE;
-	case GDK_BUTTON_MIDDLE:
-		if (state == 0)
-			return open_entry(widget, entry, TRUE);
-		return FALSE;
-	case GDK_BUTTON_SECONDARY:
-		// On X11, after closing the menu, the pointer otherwise remains,
-		// no matter what its new location is.
-		gdk_window_set_cursor(gtk_widget_get_window(widget), NULL);
-		show_context_menu(widget, entry->uri);
-		return TRUE;
-	default:
-		return FALSE;
-	}
-}
-
-gboolean
-fastiv_browser_motion_notify_event(GtkWidget *widget, GdkEventMotion *event)
-{
-	GTK_WIDGET_CLASS(fastiv_browser_parent_class)
-		->motion_notify_event(widget, event);
-
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	if (event->state != 0)
-		return FALSE;
-
-	const Entry *entry = entry_at(self, event->x, event->y);
-	GdkWindow *window = gtk_widget_get_window(widget);
-	gdk_window_set_cursor(window, entry ? self->pointer : NULL);
-	return TRUE;
-}
-
-static gboolean
-fastiv_browser_scroll_event(GtkWidget *widget, GdkEventScroll *event)
-{
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	if ((event->state & gtk_accelerator_get_default_mod_mask()) !=
-		GDK_CONTROL_MASK)
-		return FALSE;
-
-	switch (event->direction) {
-	case GDK_SCROLL_UP:
-		set_item_size(self, self->item_size + 1);
-		return TRUE;
-	case GDK_SCROLL_DOWN:
-		set_item_size(self, self->item_size - 1);
-		return TRUE;
-	default:
-		// For some reason, we can also get GDK_SCROLL_SMOOTH.
-		// Left/right are good to steal from GtkScrolledWindow for consistency.
-		return TRUE;
-	}
-}
-
-static gboolean
-fastiv_browser_query_tooltip(GtkWidget *widget, gint x, gint y,
-	G_GNUC_UNUSED gboolean keyboard_tooltip, GtkTooltip *tooltip)
-{
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	const Entry *entry = entry_at(self, x, y);
-	if (!entry)
-		return FALSE;
-
-	GFile *file = g_file_new_for_uri(entry->uri);
-	GFileInfo *info = g_file_query_info(file,
-		G_FILE_ATTRIBUTE_STANDARD_NAME
-		"," G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME,
-		G_FILE_QUERY_INFO_NONE, NULL, NULL);
-	g_object_unref(file);
-	if (!info)
-		return FALSE;
-
-	gtk_tooltip_set_text(tooltip, g_file_info_get_display_name(info));
-	g_object_unref(info);
-	return TRUE;
-}
-
-static void
-fastiv_browser_style_updated(GtkWidget *widget)
-{
-	GTK_WIDGET_CLASS(fastiv_browser_parent_class)->style_updated(widget);
-
-	FastivBrowser *self = FASTIV_BROWSER(widget);
-	GtkStyleContext *style = gtk_widget_get_style_context(widget);
-	GtkBorder border = {}, margin = {};
-
-	int item_spacing = self->item_spacing;
-	gtk_widget_style_get(widget, "spacing", &self->item_spacing, NULL);
-	if (item_spacing != self->item_spacing)
-		gtk_widget_queue_resize(widget);
-
-	// Using a pseudo-class, because GTK+ regions are deprecated.
-	gtk_style_context_save(style);
-	gtk_style_context_add_class(style, "item");
-	gtk_style_context_get_margin(style, GTK_STATE_FLAG_NORMAL, &margin);
-	gtk_style_context_get_border(style, GTK_STATE_FLAG_NORMAL, &border);
-	gtk_style_context_restore(style);
-
-	const int glow_w = (margin.left + margin.right) / 2;
-	const int glow_h = (margin.top + margin.bottom) / 2;
-
-	// Don't set different opposing sides, it will misrender, your problem.
-	// When the style of the class changes, this virtual method isn't invoked,
-	// so the update check is mildly pointless.
-	int item_border_x = glow_w + (border.left + border.right) / 2;
-	int item_border_y = glow_h + (border.top + border.bottom) / 2;
-	if (item_border_x != self->item_border_x ||
-		item_border_y != self->item_border_y) {
-		self->item_border_x = item_border_x;
-		self->item_border_y = item_border_y;
-		gtk_widget_queue_resize(widget);
-	}
-
-	if (self->glow)
-		cairo_surface_destroy(self->glow);
-	if (glow_w <= 0 || glow_h <= 0) {
-		self->glow = cairo_image_surface_create(CAIRO_FORMAT_A1, 0, 0);
-		return;
-	}
-
-	self->glow =
-		cairo_image_surface_create(CAIRO_FORMAT_A8, glow_w, glow_h);
-	unsigned char *data = cairo_image_surface_get_data(self->glow);
-	int stride = cairo_image_surface_get_stride(self->glow);
-
-	// Smooth out the curve, so that the edge of the glow isn't too jarring.
-	const double fade_factor = 1.5;
-
-	const int x_max = glow_w - 1;
-	const int y_max = glow_h - 1;
-	const double x_scale = 1. / MAX(1, x_max);
-	const double y_scale = 1. / MAX(1, y_max);
-	for (int y = 0; y <= y_max; y++)
-		for (int x = 0; x <= x_max; x++) {
-			const double xn = x_scale * (x_max - x);
-			const double yn = y_scale * (y_max - y);
-			double v = MIN(sqrt(xn * xn + yn * yn), 1);
-			data[y * stride + x] = round(pow(1 - v, fade_factor) * 255);
-		}
-	cairo_surface_mark_dirty(self->glow);
-}
-
-static void
-fastiv_browser_class_init(FastivBrowserClass *klass)
-{
-	GObjectClass *object_class = G_OBJECT_CLASS(klass);
-	object_class->finalize = fastiv_browser_finalize;
-	object_class->get_property = fastiv_browser_get_property;
-	object_class->set_property = fastiv_browser_set_property;
-
-	browser_properties[PROP_THUMBNAIL_SIZE] = g_param_spec_enum(
-		"thumbnail-size", "Thumbnail size", "The thumbnail height to use",
-		FASTIV_TYPE_IO_THUMBNAIL_SIZE, FASTIV_IO_THUMBNAIL_SIZE_NORMAL,
-		G_PARAM_READWRITE);
-	g_object_class_install_properties(
-		object_class, N_PROPERTIES, browser_properties);
-
-	browser_signals[ITEM_ACTIVATED] = g_signal_new("item-activated",
-		G_TYPE_FROM_CLASS(klass), 0, 0, NULL, NULL, NULL,
-		G_TYPE_NONE, 2, G_TYPE_FILE, GTK_TYPE_PLACES_OPEN_FLAGS);
-
-	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
-	widget_class->get_request_mode = fastiv_browser_get_request_mode;
-	widget_class->get_preferred_width = fastiv_browser_get_preferred_width;
-	widget_class->get_preferred_height_for_width =
-		fastiv_browser_get_preferred_height_for_width;
-	widget_class->realize = fastiv_browser_realize;
-	widget_class->draw = fastiv_browser_draw;
-	widget_class->size_allocate = fastiv_browser_size_allocate;
-	widget_class->button_press_event = fastiv_browser_button_press_event;
-	widget_class->motion_notify_event = fastiv_browser_motion_notify_event;
-	widget_class->scroll_event = fastiv_browser_scroll_event;
-	widget_class->query_tooltip = fastiv_browser_query_tooltip;
-	widget_class->style_updated = fastiv_browser_style_updated;
-
-	// Could be split to also-idiomatic row-spacing/column-spacing properties.
-	// The GParamSpec is sinked by this call.
-	gtk_widget_class_install_style_property(widget_class,
-		g_param_spec_int("spacing", "Spacing", "Space between items",
-			0, G_MAXINT, 1, G_PARAM_READWRITE));
-
-	// TODO(p): Later override "screen_changed", recreate Pango layouts there,
-	// if we get to have any, or otherwise reflect DPI changes.
-	gtk_widget_class_set_css_name(widget_class, "fastiv-browser");
-}
-
-static void
-fastiv_browser_init(FastivBrowser *self)
-{
-	gtk_widget_set_can_focus(GTK_WIDGET(self), TRUE);
-	gtk_widget_set_has_tooltip(GTK_WIDGET(self), TRUE);
-
-	self->entries = g_array_new(FALSE, TRUE, sizeof(Entry));
-	g_array_set_clear_func(self->entries, (GDestroyNotify) entry_free);
-	self->layouted_rows = g_array_new(FALSE, TRUE, sizeof(Row));
-	g_array_set_clear_func(self->layouted_rows, (GDestroyNotify) row_free);
-
-	set_item_size(self, FASTIV_IO_THUMBNAIL_SIZE_NORMAL);
-	self->selected = -1;
-	self->glow = cairo_image_surface_create(CAIRO_FORMAT_A1, 0, 0);
-
-	g_signal_connect_swapped(gtk_settings_get_default(),
-		"notify::gtk-icon-theme-name", G_CALLBACK(reload_thumbnails), self);
-}
-
-// --- Public interface --------------------------------------------------------
-
-static gint
-entry_compare(gconstpointer a, gconstpointer b)
-{
-	const Entry *entry1 = a;
-	const Entry *entry2 = b;
-	GFile *location1 = g_file_new_for_uri(entry1->uri);
-	GFile *location2 = g_file_new_for_uri(entry2->uri);
-	gint result = fastiv_io_filecmp(location1, location2);
-	g_object_unref(location1);
-	g_object_unref(location2);
-	return result;
-}
-
-void
-fastiv_browser_load(
-	FastivBrowser *self, FastivBrowserFilterCallback cb, const char *path)
-{
-	g_array_set_size(self->entries, 0);
-	g_array_set_size(self->layouted_rows, 0);
-
-	GFile *file = g_file_new_for_path(path);
-	GFileEnumerator *enumerator = g_file_enumerate_children(file,
-		G_FILE_ATTRIBUTE_STANDARD_NAME "," G_FILE_ATTRIBUTE_STANDARD_TYPE,
-		G_FILE_QUERY_INFO_NONE, NULL, NULL);
-	g_object_unref(file);
-	if (!enumerator)
-		return;
-
-	while (TRUE) {
-		GFileInfo *info = NULL;
-		GFile *child = NULL;
-		if (!g_file_enumerator_iterate(enumerator, &info, &child, NULL, NULL) ||
-			!info)
-			break;
-		if (g_file_info_get_file_type(info) == G_FILE_TYPE_DIRECTORY)
-			continue;
-		if (cb && !cb(g_file_info_get_name(info)))
-			continue;
-
-		g_array_append_val(self->entries,
-			((Entry) {.thumbnail = NULL, .uri = g_file_get_uri(child)}));
-	}
-	g_object_unref(enumerator);
-
-	// TODO(p): Support being passed a sort function.
-	g_array_sort(self->entries, entry_compare);
-
-	reload_thumbnails(self);
-}