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Diffstat (limited to 'fiv-browser.c')
| -rw-r--r-- | fiv-browser.c | 1064 |
1 files changed, 1064 insertions, 0 deletions
diff --git a/fiv-browser.c b/fiv-browser.c new file mode 100644 index 0000000..7759c3a --- /dev/null +++ b/fiv-browser.c @@ -0,0 +1,1064 @@ +// +// fiv-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 "fiv-browser.h" +#include "fiv-io.h" +#include "fiv-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 _FivBrowser { + GtkWidget parent_instance; + + FivIoThumbnailSize 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(FivBrowser *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(FivBrowser *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(FivBrowser *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(FivBrowser *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(FivBrowser *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(FivBrowser *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); + + FivBrowser *browser = FIV_BROWSER(user_data); + GFile *file = g_file_new_for_uri(self->uri); + self->thumbnail = rescale_thumbnail( + fiv_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(FivBrowser *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(FivBrowser *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(FivBrowser, fiv_browser, GTK_TYPE_WIDGET, 0, + /* G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE, + fiv_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 +fiv_browser_finalize(GObject *gobject) +{ + FivBrowser *self = FIV_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(fiv_browser_parent_class)->finalize(gobject); +} + +static void +fiv_browser_get_property( + GObject *object, guint property_id, GValue *value, GParamSpec *pspec) +{ + FivBrowser *self = FIV_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(FivBrowser *self, FivIoThumbnailSize size) +{ + if (size < FIV_IO_THUMBNAIL_SIZE_MIN || size > FIV_IO_THUMBNAIL_SIZE_MAX) + return; + + if (size != self->item_size) { + self->item_size = size; + self->item_height = fiv_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 +fiv_browser_set_property( + GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) +{ + FivBrowser *self = FIV_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 +fiv_browser_get_request_mode(G_GNUC_UNUSED GtkWidget *widget) +{ + return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH; +} + +static void +fiv_browser_get_preferred_width(GtkWidget *widget, gint *minimum, gint *natural) +{ + FivBrowser *self = FIV_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 +fiv_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(FIV_BROWSER(widget), width); +} + +static void +fiv_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); + + FivBrowser *self = FIV_BROWSER(widget); + g_clear_object(&self->pointer); + self->pointer = + gdk_cursor_new_from_name(gdk_window_get_display(window), "pointer"); +} + +static void +fiv_browser_size_allocate(GtkWidget *widget, GtkAllocation *allocation) +{ + GTK_WIDGET_CLASS(fiv_browser_parent_class) + ->size_allocate(widget, allocation); + + relayout(FIV_BROWSER(widget), allocation->width); +} + +static gboolean +fiv_browser_draw(GtkWidget *widget, cairo_t *cr) +{ + FivBrowser *self = FIV_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 +fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event) +{ + GTK_WIDGET_CLASS(fiv_browser_parent_class) + ->button_press_event(widget, event); + + FivBrowser *self = FIV_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 +fiv_browser_motion_notify_event(GtkWidget *widget, GdkEventMotion *event) +{ + GTK_WIDGET_CLASS(fiv_browser_parent_class) + ->motion_notify_event(widget, event); + + FivBrowser *self = FIV_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 +fiv_browser_scroll_event(GtkWidget *widget, GdkEventScroll *event) +{ + FivBrowser *self = FIV_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 +fiv_browser_query_tooltip(GtkWidget *widget, gint x, gint y, + G_GNUC_UNUSED gboolean keyboard_tooltip, GtkTooltip *tooltip) +{ + FivBrowser *self = FIV_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 +fiv_browser_style_updated(GtkWidget *widget) +{ + GTK_WIDGET_CLASS(fiv_browser_parent_class)->style_updated(widget); + + FivBrowser *self = FIV_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 +fiv_browser_class_init(FivBrowserClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS(klass); + object_class->finalize = fiv_browser_finalize; + object_class->get_property = fiv_browser_get_property; + object_class->set_property = fiv_browser_set_property; + + browser_properties[PROP_THUMBNAIL_SIZE] = g_param_spec_enum( + "thumbnail-size", "Thumbnail size", "The thumbnail height to use", + FIV_TYPE_IO_THUMBNAIL_SIZE, FIV_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 = fiv_browser_get_request_mode; + widget_class->get_preferred_width = fiv_browser_get_preferred_width; + widget_class->get_preferred_height_for_width = + fiv_browser_get_preferred_height_for_width; + widget_class->realize = fiv_browser_realize; + widget_class->draw = fiv_browser_draw; + widget_class->size_allocate = fiv_browser_size_allocate; + widget_class->button_press_event = fiv_browser_button_press_event; + widget_class->motion_notify_event = fiv_browser_motion_notify_event; + widget_class->scroll_event = fiv_browser_scroll_event; + widget_class->query_tooltip = fiv_browser_query_tooltip; + widget_class->style_updated = fiv_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, "fiv-browser"); +} + +static void +fiv_browser_init(FivBrowser *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, FIV_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 = fiv_io_filecmp(location1, location2); + g_object_unref(location1); + g_object_unref(location2); + return result; +} + +void +fiv_browser_load( + FivBrowser *self, FivBrowserFilterCallback 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); +} |