// // fiv-browser.c: filesystem browsing widget // // Copyright (c) 2021 - 2023, Přemysl Eric Janouch // // 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 "config.h" #include #include #include #ifdef GDK_WINDOWING_X11 #include #endif // GDK_WINDOWING_X11 #ifdef GDK_WINDOWING_QUARTZ #include #endif // GDK_WINDOWING_QUARTZ #include "fiv-browser.h" #include "fiv-collection.h" #include "fiv-context-menu.h" #include "fiv-io.h" #include "fiv-io-model.h" #include "fiv-thumbnail.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 // │ l a b e l // │ s p a c i n g // │ ╭┄┄┄┄┄┄┄┄┄┄┄┄╮ ╭┄┄┄┄┄┄┄┄┄┄┄┄ // // The glow is actually a glowing margin, the border is rendered in two parts. // When labels are hidden, the surrounding spacing is collapsed. // typedef struct entry Entry; typedef struct item Item; typedef struct row Row; typedef struct { FivBrowser *self; ///< Parent browser Entry *target; ///< Currently processed Entry pointer GSubprocess *minion; ///< A slave for the current queue head GCancellable *cancel; ///< Cancellable handle } Thumbnailer; struct _FivBrowser { GtkWidget parent_instance; GtkAdjustment *hadjustment; ///< GtkScrollable boilerplate GtkAdjustment *vadjustment; ///< GtkScrollable boilerplate GtkScrollablePolicy hscroll_policy; ///< GtkScrollable boilerplate GtkScrollablePolicy vscroll_policy; ///< GtkScrollable boilerplate FivThumbnailSize item_size; ///< Thumbnail size int item_height; ///< Thumbnail height in pixels int item_spacing; ///< Space between items in pixels gboolean show_labels; ///< Show labels underneath items FivIoModel *model; ///< Filesystem model GPtrArray *entries; ///< []*Entry GArray *layouted_rows; ///< []Row const Entry *selected; ///< Selected entry or NULL guint tracked_button; ///< Pressed mouse button number or 0 double drag_begin_x; ///< Viewport start X coordinate or -1 double drag_begin_y; ///< Viewport start Y coordinate or -1 GHashTable *thumbnail_cache; ///< [URI]cairo_surface_t, for item_size Thumbnailer *thumbnailers; ///< Parallelized thumbnailers size_t thumbnailers_len; ///< Thumbnailers array size GQueue thumbnailers_queue; ///< Queued up Entry pointers GdkCursor *pointer; ///< Cached pointer cursor cairo_pattern_t *glow; ///< CAIRO_FORMAT_A8 mask for corners cairo_pattern_t *glow_padded; ///< CAIRO_FORMAT_A8 mask int glow_w; ///< Glow corner width int glow_h; ///< Glow corner height int item_border_x; ///< L/R .item margin + border int item_border_y; ///< T/B .item margin + border }; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// The "last modified" timestamp of source images for thumbnails. static cairo_user_data_key_t fiv_browser_key_mtime_msec; /// The original file size of source images for thumbnails. static cairo_user_data_key_t fiv_browser_key_filesize; struct entry { FivIoModelEntry *e; ///< Reference to model entry cairo_surface_t *thumbnail; ///< Prescaled thumbnail GIcon *icon; ///< If no thumbnail, use this icon gboolean removed; ///< Model announced removal }; static Entry * entry_new(FivIoModelEntry *e) { Entry *self = g_slice_alloc0(sizeof *self); self->e = e; return self; } static void entry_destroy(Entry *self) { fiv_io_model_entry_unref(self->e); g_clear_pointer(&self->thumbnail, cairo_surface_destroy); g_clear_object(&self->icon); g_slice_free1(sizeof *self, self); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - struct item { const Entry *entry; PangoLayout *label; ///< Label int x_offset; ///< X offset within the row }; struct row { Item *items; ///< Ends with a NULL entry gsize len; ///< Length of items int x_offset; ///< Start position outside borders int y_offset; ///< Start position inside borders }; static void row_free(Row *self) { for (gsize i = 0; i < self->len; i++) g_clear_object(&self->items[i].label); g_free(self->items); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static double row_subheight(const FivBrowser *self, const Row *row) { if (!self->show_labels) return 0; // If we didn't ellipsize labels, this should be made to account // for vertical centering as well. int tallest_label = 0; for (gsize i = 0; i < row->len; i++) { PangoRectangle ink = {}, logical = {}; pango_layout_get_extents(row->items[i].label, &ink, &logical); int height = (logical.y + logical.height) / PANGO_SCALE; if (tallest_label < height) tallest_label = height; } return self->item_spacing + tallest_label; } 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; Row row = {.x_offset = x, .y_offset = *y}; row.items = g_array_steal(items_array, &row.len), g_array_append_val(self->layouted_rows, row); // Not trying to pack them vertically, but this would be the place to do it. *y += self->item_height; *y += self->item_border_y; *y += row_subheight(self, &row); } 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, max_width = 0; g_array_set_size(self->layouted_rows, 0); // Whatever self->drag_begin_* used to point at might no longer be there, // but thumbnail reloading would disrupt mouse clicks if we cleared them. 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 = self->entries->pdata[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; } PangoLayout *label = NULL; if (self->show_labels) { label = gtk_widget_create_pango_layout( widget, entry->e->display_name); pango_layout_set_width( label, (width - 2 * self->glow_w) * PANGO_SCALE); pango_layout_set_alignment(label, PANGO_ALIGN_CENTER); pango_layout_set_wrap(label, PANGO_WRAP_WORD_CHAR); pango_layout_set_ellipsize(label, PANGO_ELLIPSIZE_END); PangoAttrList *attrs = pango_attr_list_new(); pango_attr_list_insert(attrs, pango_attr_insert_hyphens_new(FALSE)); pango_layout_set_attributes(label, attrs); pango_attr_list_unref (attrs); } g_array_append_val(items, ((Item) { .entry = entry, .label = label, .x_offset = x + self->item_border_x, })); x += width; if (max_width < width) max_width = width; } if (items->len) { append_row(self, &y, padding.left + MAX(0, available_width - x) / 2, items); } g_array_free(items, TRUE); int total_height = y + padding.bottom; if (self->hadjustment) { gtk_adjustment_set_lower(self->hadjustment, 0); gtk_adjustment_set_upper(self->hadjustment, width + MAX(0, max_width - available_width)); gtk_adjustment_set_step_increment(self->hadjustment, width * 0.1); gtk_adjustment_set_page_increment(self->hadjustment, width * 0.9); gtk_adjustment_set_page_size(self->hadjustment, width); } if (self->vadjustment) { gtk_adjustment_set_lower(self->vadjustment, 0); gtk_adjustment_set_upper(self->vadjustment, total_height); gtk_adjustment_set_step_increment(self->vadjustment, self->item_height + self->item_spacing + 2 * self->item_border_y); gtk_adjustment_set_page_increment( self->vadjustment, gtk_widget_get_allocated_height(widget) * 0.9); gtk_adjustment_set_page_size( self->vadjustment, gtk_widget_get_allocated_height(widget)); } return total_height; } static void draw_outer_border(FivBrowser *self, cairo_t *cr, int width, int height) { cairo_matrix_t matrix; cairo_save(cr); cairo_translate(cr, -self->glow_w, -self->glow_h); cairo_rectangle(cr, 0, 0, self->glow_w + width, self->glow_h + height); cairo_clip(cr); cairo_mask(cr, self->glow_padded); cairo_restore(cr); cairo_save(cr); cairo_translate(cr, width + self->glow_w, height + self->glow_h); cairo_rectangle(cr, 0, 0, -self->glow_w - width, -self->glow_h - height); cairo_clip(cr); cairo_scale(cr, -1, -1); cairo_mask(cr, self->glow_padded); cairo_restore(cr); cairo_matrix_init_scale(&matrix, -1, 1); cairo_matrix_translate(&matrix, -width - self->glow_w, self->glow_h); cairo_pattern_set_matrix(self->glow, &matrix); cairo_mask(cr, self->glow); cairo_matrix_init_scale(&matrix, 1, -1); cairo_matrix_translate(&matrix, self->glow_w, -height - self->glow_h); cairo_pattern_set_matrix(self->glow, &matrix); cairo_mask(cr, self->glow); } 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) / 2, .width = width, .height = height, }; } static const Entry * entry_at(FivBrowser *self, int x, int y) { if (self->hadjustment) x += round(gtk_adjustment_get_value(self->hadjustment)); if (self->vadjustment) y += round(gtk_adjustment_get_value(self->vadjustment)); 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 GdkRectangle entry_rect(FivBrowser *self, const Entry *entry) { GdkRectangle rect = {}; 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++) { if (item->entry == entry) { rect = item_extents(self, item, row); break; } } } if (self->hadjustment) rect.x -= round(gtk_adjustment_get_value(self->hadjustment)); if (self->vadjustment) rect.y -= round(gtk_adjustment_get_value(self->vadjustment)); return rect; } 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"); GtkBorder border; GtkStateFlags common_state = gtk_style_context_get_state(style); gtk_style_context_get_border(style, common_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); GtkStateFlags state = common_state; if (item->entry == self->selected) state |= GTK_STATE_FLAG_SELECTED; gtk_style_context_save(style); gtk_style_context_set_state(style, state); if (item->entry->icon) { gtk_style_context_add_class(style, "symbolic"); } else { GdkRGBA glow_color = {}; gtk_style_context_get_color(style, state, &glow_color); 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); } // Performance optimization--specifically targeting the checkerboard. if (cairo_image_surface_get_format(item->entry->thumbnail) != CAIRO_FORMAT_RGB24) { 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); // Here, we could consider multiplying // the whole rectangle with the selection color. } // TODO(p): Come up with a better rendition. if (item->entry->removed) { cairo_move_to(cr, 0, border.top + extents.height + border.bottom); cairo_line_to(cr, border.left + extents.width + border.right, 0); cairo_set_source_rgb(cr, 0.5, 0.5, 0.5); cairo_set_line_width(cr, 5); cairo_stroke(cr); } if (self->show_labels) { gtk_style_context_save(style); gtk_style_context_add_class(style, "label"); gtk_render_layout(style, cr, -border.left, border.top + extents.height + self->item_border_y + self->item_spacing, item->label); gtk_style_context_restore(style); } 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 > FIV_THUMBNAIL_WIDE_COEFFICIENT * height) { scale_x = FIV_THUMBNAIL_WIDE_COEFFICIENT * 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_format_t cairo_format = cairo_image_surface_get_format(thumbnail); cairo_surface_t *scaled = cairo_image_surface_create( cairo_format, 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 = cairo_format == CAIRO_FORMAT_RGB24 ? PIXMAN_x8r8g8b8 : 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_set_user_data( scaled, &fiv_thumbnail_key_lq, (void *) (intptr_t) 1, NULL); cairo_surface_destroy(thumbnail); cairo_surface_mark_dirty(scaled); return scaled; } static const char * entry_system_wide_uri(const Entry *self) { // "recent" and "trash", e.g., also have "standard::target-uri" set, // but we'd like to avoid saving their thumbnails. if (self->e->target_uri && fiv_collection_uri_matches(self->e->uri)) return self->e->target_uri; return self->e->uri; } static void entry_set_surface_user_data(const Entry *self) { // This choice of mtime favours unnecessary thumbnail reloading // over retaining stale data (consider both calling functions). cairo_surface_set_user_data(self->thumbnail, &fiv_browser_key_mtime_msec, (void *) (intptr_t) self->e->mtime_msec, NULL); cairo_surface_set_user_data(self->thumbnail, &fiv_browser_key_filesize, (void *) (uintptr_t) self->e->filesize, NULL); } static cairo_surface_t * entry_lookup_thumbnail(Entry *self, FivBrowser *browser) { cairo_surface_t *cached = g_hash_table_lookup(browser->thumbnail_cache, self->e->uri); if (cached && (intptr_t) cairo_surface_get_user_data(cached, &fiv_browser_key_mtime_msec) == (intptr_t) self->e->mtime_msec && (uintptr_t) cairo_surface_get_user_data(cached, &fiv_browser_key_filesize) == (uintptr_t) self->e->filesize) { // TODO(p): If this hit is low-quality, see if a high-quality thumbnail // hasn't been produced without our knowledge (avoid launching a minion // unnecessarily; we might also shift the concern there). return cairo_surface_reference(cached); } cairo_surface_t *found = fiv_thumbnail_lookup( entry_system_wide_uri(self), self->e->mtime_msec, self->e->filesize, browser->item_size); return rescale_thumbnail(found, browser->item_height); } static void entry_add_thumbnail(gpointer data, gpointer user_data) { Entry *self = data; FivBrowser *browser = FIV_BROWSER(user_data); if (self->removed) { // Keep whatever size of thumbnail we had at the time up until reload. // g_file_query_info() fails for removed files, so keep the icon, too. if (self->icon) { g_clear_pointer(&self->thumbnail, cairo_surface_destroy); } else { self->thumbnail = rescale_thumbnail(self->thumbnail, browser->item_height); } return; } g_clear_object(&self->icon); g_clear_pointer(&self->thumbnail, cairo_surface_destroy); if ((self->thumbnail = entry_lookup_thumbnail(self, browser))) { // Yes, this is a pointless action in case it's been found in the cache. entry_set_surface_user_data(self); return; } // Fall back to symbolic icons, though there's only so much we can do // in parallel--GTK+ isn't thread-safe. GFile *file = g_file_new_for_uri(self->e->uri); 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); g_object_unref(file); if (info) { GIcon *icon = g_file_info_get_symbolic_icon(info); if (icon) self->icon = g_object_ref(icon); g_object_unref(info); } // The GVfs backend may not be friendly. if (!self->icon) self->icon = g_icon_new_for_string("text-x-generic-symbolic", NULL); } 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, self->entries->pdata[i], NULL); g_thread_pool_free(pool, FALSE, TRUE); // Once a URI disappears from the model, its thumbnail is forgotten. g_hash_table_remove_all(self->thumbnail_cache); for (guint i = 0; i < self->entries->len; i++) { Entry *entry = self->entries->pdata[i]; if (!entry->removed && entry->thumbnail) { g_hash_table_insert(self->thumbnail_cache, g_strdup(entry->e->uri), cairo_surface_reference(entry->thumbnail)); } materialize_icon(self, entry); } gtk_widget_queue_resize(GTK_WIDGET(self)); } // --- Minion management ------------------------------------------------------- #if !GLIB_CHECK_VERSION(2, 70, 0) #define g_spawn_check_wait_status g_spawn_check_exit_status #endif static gboolean thumbnailer_next(Thumbnailer *t); static void thumbnailer_reprocess_entry(FivBrowser *self, GBytes *output, Entry *entry) { g_clear_object(&entry->icon); g_clear_pointer(&entry->thumbnail, cairo_surface_destroy); gtk_widget_queue_resize(GTK_WIDGET(self)); guint64 flags = 0; if (!output || !(entry->thumbnail = rescale_thumbnail( fiv_io_deserialize(output, &flags), self->item_height))) { entry_add_thumbnail(entry, self); materialize_icon(self, entry); return; } if ((flags & FIV_IO_SERIALIZE_LOW_QUALITY)) { cairo_surface_set_user_data(entry->thumbnail, &fiv_thumbnail_key_lq, (void *) (intptr_t) 1, NULL); g_queue_push_tail(&self->thumbnailers_queue, entry); } entry_set_surface_user_data(entry); g_hash_table_insert(self->thumbnail_cache, g_strdup(entry->e->uri), cairo_surface_reference(entry->thumbnail)); } static void on_thumbnailer_ready(GObject *object, GAsyncResult *res, gpointer user_data) { GSubprocess *subprocess = G_SUBPROCESS(object); Thumbnailer *t = user_data; // Reading out pixel data directly from a thumbnailer serves two purposes: // 1. it avoids pointless delays with large thumbnail sizes, // 2. it enables thumbnailing things that cannot be placed in the cache. GError *error = NULL; GBytes *out = NULL; gboolean succeeded = FALSE; if (!g_subprocess_communicate_finish(subprocess, res, &out, NULL, &error)) { if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) { g_error_free(error); return; } } else if (!g_subprocess_get_if_exited(subprocess)) { // If it exited, it probably printed its own message. g_spawn_check_wait_status(g_subprocess_get_status(subprocess), &error); } else { succeeded = g_subprocess_get_exit_status(subprocess) == EXIT_SUCCESS; } if (error) { g_warning("%s", error->message); g_error_free(error); } g_return_if_fail(subprocess == t->minion); g_clear_object(&t->minion); if (!t->target) { g_warning("finished thumbnailing an unknown image"); g_clear_pointer(&out, g_bytes_unref); return; } if (succeeded) thumbnailer_reprocess_entry(t->self, out, t->target); else g_clear_pointer(&out, g_bytes_unref); t->target = NULL; thumbnailer_next(t); } static gboolean thumbnailer_next(Thumbnailer *t) { // TODO(p): Try to keep the minions alive (stdout will be a problem). FivBrowser *self = t->self; if (!(t->target = g_queue_pop_head(&self->thumbnailers_queue))) return FALSE; // Case analysis: // - We haven't found any thumbnail for the entry at all // (and it has a symbolic icon as a result): // we want to fill the void ASAP, so go for embedded thumbnails first. // - We've found one, but we're not quite happy with it: // always run the full process for a high-quality wide thumbnail. // - We can't end up here in any other cases. const char *uri = entry_system_wide_uri(t->target); const char *argv_faster[] = {PROJECT_NAME, "--extract-thumbnail", "--thumbnail", fiv_thumbnail_sizes[self->item_size].thumbnail_spec_name, "--", uri, NULL}; const char *argv_slower[] = {PROJECT_NAME, "--thumbnail", fiv_thumbnail_sizes[self->item_size].thumbnail_spec_name, "--", uri, NULL}; GError *error = NULL; t->minion = g_subprocess_newv(t->target->icon ? argv_faster : argv_slower, G_SUBPROCESS_FLAGS_STDOUT_PIPE, &error); if (error) { g_warning("%s", error->message); g_error_free(error); return FALSE; } t->cancel = g_cancellable_new(); g_subprocess_communicate_async( t->minion, NULL, t->cancel, on_thumbnailer_ready, t); return TRUE; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static void thumbnailers_abort(FivBrowser *self) { g_queue_clear(&self->thumbnailers_queue); for (size_t i = 0; i < self->thumbnailers_len; i++) { Thumbnailer *t = self->thumbnailers + i; if (t->cancel) { g_cancellable_cancel(t->cancel); g_clear_object(&t->cancel); } // Just let them exit on their own. g_clear_object(&t->minion); t->target = NULL; } } static void thumbnailers_start(FivBrowser *self) { thumbnailers_abort(self); if (!self->model) return; GQueue lq = G_QUEUE_INIT; for (guint i = 0; i < self->entries->len; i++) { Entry *entry = self->entries->pdata[i]; if (entry->removed) continue; if (entry->icon) g_queue_push_tail(&self->thumbnailers_queue, entry); else if (cairo_surface_get_user_data( entry->thumbnail, &fiv_thumbnail_key_lq)) g_queue_push_tail(&lq, entry); } while (!g_queue_is_empty(&lq)) { g_queue_push_tail_link( &self->thumbnailers_queue, g_queue_pop_head_link(&lq)); } for (size_t i = 0; i < self->thumbnailers_len; i++) { if (!thumbnailer_next(self->thumbnailers + i)) break; } } // --- Boilerplate ------------------------------------------------------------- G_DEFINE_TYPE_EXTENDED(FivBrowser, fiv_browser, GTK_TYPE_WIDGET, 0, G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE, NULL)) enum { PROP_THUMBNAIL_SIZE = 1, PROP_SHOW_LABELS, N_PROPERTIES, // These are overriden, we do not register them. PROP_HADJUSTMENT, PROP_VADJUSTMENT, PROP_HSCROLL_POLICY, PROP_VSCROLL_POLICY, }; 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 on_adjustment_value_changed( G_GNUC_UNUSED GtkAdjustment *adjustment, gpointer user_data) { gtk_widget_queue_draw(GTK_WIDGET(user_data)); } static gboolean replace_adjustment( FivBrowser *self, GtkAdjustment **adjustment, GtkAdjustment *replacement) { if (*adjustment == replacement) return FALSE; if (*adjustment) { g_signal_handlers_disconnect_by_func( *adjustment, on_adjustment_value_changed, self); g_clear_object(adjustment); } if (replacement) { *adjustment = g_object_ref(replacement); g_signal_connect(*adjustment, "value-changed", G_CALLBACK(on_adjustment_value_changed), self); // TODO(p): We should set it up, as it is done in relayout(). } return TRUE; } static void fiv_browser_finalize(GObject *gobject) { FivBrowser *self = FIV_BROWSER(gobject); thumbnailers_abort(self); g_ptr_array_free(self->entries, TRUE); g_array_free(self->layouted_rows, TRUE); if (self->model) { g_signal_handlers_disconnect_by_data(self->model, self); g_clear_object(&self->model); } g_hash_table_destroy(self->thumbnail_cache); cairo_pattern_destroy(self->glow_padded); cairo_pattern_destroy(self->glow); g_clear_object(&self->pointer); replace_adjustment(self, &self->hadjustment, NULL); replace_adjustment(self, &self->vadjustment, NULL); 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; case PROP_SHOW_LABELS: g_value_set_boolean(value, self->show_labels); break; case PROP_HADJUSTMENT: g_value_set_object(value, self->hadjustment); break; case PROP_VADJUSTMENT: g_value_set_object(value, self->vadjustment); break; case PROP_HSCROLL_POLICY: g_value_set_enum(value, self->hscroll_policy); break; case PROP_VSCROLL_POLICY: g_value_set_enum(value, self->vscroll_policy); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec); } } static void set_item_size(FivBrowser *self, FivThumbnailSize size) { if (size < FIV_THUMBNAIL_SIZE_MIN || size > FIV_THUMBNAIL_SIZE_MAX) return; if (size != self->item_size) { self->item_size = size; self->item_height = fiv_thumbnail_sizes[self->item_size].size; g_hash_table_remove_all(self->thumbnail_cache); reload_thumbnails(self); thumbnailers_start(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; case PROP_SHOW_LABELS: if (self->show_labels != g_value_get_boolean(value)) { self->show_labels = g_value_get_boolean(value); gtk_widget_queue_resize(GTK_WIDGET(self)); g_object_notify_by_pspec(object, pspec); } break; case PROP_HADJUSTMENT: if (replace_adjustment( self, &self->hadjustment, g_value_get_object(value))) g_object_notify_by_pspec(object, pspec); break; case PROP_VADJUSTMENT: if (replace_adjustment( self, &self->vadjustment, g_value_get_object(value))) g_object_notify_by_pspec(object, pspec); break; case PROP_HSCROLL_POLICY: if ((gint) self->hscroll_policy != g_value_get_enum(value)) { self->hscroll_policy = g_value_get_enum(value); gtk_widget_queue_resize(GTK_WIDGET(self)); g_object_notify_by_pspec(object, pspec); } break; case PROP_VSCROLL_POLICY: if ((gint) self->vscroll_policy != g_value_get_enum(value)) { self->vscroll_policy = g_value_get_enum(value); gtk_widget_queue_resize(GTK_WIDGET(self)); g_object_notify_by_pspec(object, pspec); } 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); // This should ideally reflect thumbnails, but we're in a GtkScrolledWindow, // making this rather inconsequential. int fluff = padding.left + 2 * self->item_border_x + padding.right; *minimum = fluff + self->item_height /* Icons are rectangular. */; *natural = fluff + FIV_THUMBNAIL_WIDE_COEFFICIENT * self->item_height; } 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_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_SCROLL_MASK | GDK_KEY_PRESS_MASK, }; // On Wayland, touchpad scrolling doesn't emulate the scroll wheel, // making GDK_SMOOTH_SCROLL_MASK necessary for our GtkScrolledWindow. // On X11 and Windows, this merely makes touchpad scrolling smoother. // // Note that Apple Magic Mouse's touchpad also sends out smooth scrolling // events, and is indistinguishable from a mouse wheel (GDK_SOURCE_MOUSE, // sends LIBINPUT_EVENT_POINTER_SCROLL_WHEEL). Yet, curiously, // something in the stack on Wayland makes scrolling events discrete. #ifdef GDK_WINDOWING_X11 // XXX: On X11 (at least, not on Wayland or Windows), the first scroll wheel // event only produces a smooth stop event. Not our bug, yet annoying. // We might make smooth scrolling support optional. if (!GDK_IS_X11_WINDOW(gtk_widget_get_parent_window(widget))) #endif // GDK_WINDOWING_X11 attributes.event_mask |= GDK_SMOOTH_SCROLL_MASK; // We need this window to receive input events at all. 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) { FivBrowser *self = FIV_BROWSER(widget); GTK_WIDGET_CLASS(fiv_browser_parent_class) ->size_allocate(widget, allocation); relayout(FIV_BROWSER(widget), allocation->width); // Avoid fresh blank space. if (self->hadjustment) { gtk_adjustment_set_value( self->hadjustment, gtk_adjustment_get_value(self->hadjustment)); } if (self->vadjustment) { gtk_adjustment_set_value( self->vadjustment, gtk_adjustment_get_value(self->vadjustment)); } } 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); if (self->hadjustment) cairo_translate( cr, -round(gtk_adjustment_get_value(self->hadjustment)), 0); if (self->vadjustment) cairo_translate( cr, 0, -round(gtk_adjustment_get_value(self->vadjustment))); 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->e->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 void show_context_menu(GtkWidget *widget, GFile *file) { GtkMenu *menu = fiv_context_menu_new(widget, file); if (menu) gtk_menu_popup_at_pointer(menu, NULL); } static void abort_button_tracking(FivBrowser *self) { self->tracked_button = 0; self->drag_begin_x = self->drag_begin_y = -1; } static gboolean fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event) { FivBrowser *self = FIV_BROWSER(widget); if (GTK_WIDGET_CLASS(fiv_browser_parent_class) ->button_press_event(widget, event)) return GDK_EVENT_STOP; // Make pressing multiple mouse buttons at once cancel a click. if (self->tracked_button) { abort_button_tracking(self); return GDK_EVENT_STOP; } if (event->type != GDK_BUTTON_PRESS) return GDK_EVENT_PROPAGATE; 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); // In accordance with Nautilus, Thunar, and the mildly confusing // Apple Human Interface Guidelines, but not with the ugly Windows User // Experience Interaction Guidelines, open the context menu on button press. // (Originally our own behaviour, but the GDK3 function also does this.) gboolean triggers_menu = gdk_event_triggers_context_menu((const GdkEvent *) event); const Entry *entry = entry_at(self, event->x, event->y); if (!entry) { if (triggers_menu) show_context_menu(widget, fiv_io_model_get_location(self->model)); else if (state || event->button != GDK_BUTTON_PRIMARY) return GDK_EVENT_PROPAGATE; if (self->selected) { self->selected = NULL; gtk_widget_queue_draw(widget); } return GDK_EVENT_STOP; } if (entry && triggers_menu) { self->selected = entry; gtk_widget_queue_draw(widget); // 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); GFile *file = g_file_new_for_uri(entry->e->uri); show_context_menu(widget, file); g_object_unref(file); return GDK_EVENT_STOP; } // gtk_drag_source_set() would span the whole widget area, we'd have to // un/set it as needed, in particular to handle empty space. // It might be a good idea to use GtkGestureDrag instead. if (event->button == GDK_BUTTON_PRIMARY || event->button == GDK_BUTTON_MIDDLE) { self->tracked_button = event->button; self->drag_begin_x = event->x; self->drag_begin_y = event->y; return GDK_EVENT_STOP; } return GDK_EVENT_PROPAGATE; } static gboolean fiv_browser_button_release_event(GtkWidget *widget, GdkEventButton *event) { FivBrowser *self = FIV_BROWSER(widget); if (GTK_WIDGET_CLASS(fiv_browser_parent_class) ->button_release_event(widget, event)) return GDK_EVENT_STOP; if (event->button != self->tracked_button) return GDK_EVENT_PROPAGATE; // Middle clicks should only work on the starting entry. const Entry *entry = entry_at(self, self->drag_begin_x, self->drag_begin_y); abort_button_tracking(self); if (!entry || entry != entry_at(self, event->x, event->y)) return GDK_EVENT_PROPAGATE; guint state = event->state & gtk_accelerator_get_default_mod_mask(); if ((event->button == GDK_BUTTON_PRIMARY && state == 0)) return open_entry(widget, entry, FALSE); if ((event->button == GDK_BUTTON_PRIMARY && state == GDK_CONTROL_MASK) || (event->button == GDK_BUTTON_MIDDLE && state == 0)) return open_entry(widget, entry, TRUE); return GDK_EVENT_PROPAGATE; } static gboolean fiv_browser_motion_notify_event(GtkWidget *widget, GdkEventMotion *event) { FivBrowser *self = FIV_BROWSER(widget); if (GTK_WIDGET_CLASS(fiv_browser_parent_class) ->motion_notify_event(widget, event)) return GDK_EVENT_STOP; // Touch screen dragging is how you scroll the parent GtkScrolledWindow, // don't steal that gesture. // // While we could allow dragging items that have been selected, // it's currently impossible to select on touch screens without opening, // and this behaviour/distinction seems unintuitive/surprising. guint state = event->state & gtk_accelerator_get_default_mod_mask(); if (state != 0 || self->tracked_button != GDK_BUTTON_PRIMARY || !gtk_drag_check_threshold(widget, self->drag_begin_x, self->drag_begin_y, event->x, event->y) || gdk_device_get_source(gdk_event_get_source_device( (GdkEvent *) event)) == GDK_SOURCE_TOUCHSCREEN) { 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 GDK_EVENT_PROPAGATE; } // The "correct" behaviour is to set the selection on a left mouse button // press immediately, but that is regarded as visual noise. const Entry *entry = entry_at(self, self->drag_begin_x, self->drag_begin_y); abort_button_tracking(self); if (!entry) return GDK_EVENT_STOP; self->selected = entry; gtk_widget_queue_draw(widget); GtkTargetList *target_list = gtk_target_list_new(NULL, 0); gtk_target_list_add_uri_targets(target_list, 0); GdkDragAction actions = GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK | GDK_ACTION_ASK; gtk_drag_begin_with_coordinates(widget, target_list, actions, self->tracked_button, (GdkEvent *) event, event->x, event->y); gtk_target_list_unref(target_list); return GDK_EVENT_STOP; } static gboolean fiv_browser_scroll_event(GtkWidget *widget, GdkEventScroll *event) { FivBrowser *self = FIV_BROWSER(widget); abort_button_tracking(self); if ((event->state & gtk_accelerator_get_default_mod_mask()) != GDK_CONTROL_MASK) return GDK_EVENT_PROPAGATE; static double delta = 0; switch (event->direction) { case GDK_SCROLL_UP: set_item_size(self, self->item_size + 1); return GDK_EVENT_STOP; case GDK_SCROLL_DOWN: set_item_size(self, self->item_size - 1); return GDK_EVENT_STOP; case GDK_SCROLL_SMOOTH: // On GDK/Wayland, the mouse wheel will typically create 1.5 deltas, // after dividing a 15 degree click angle from libinput by 10. // (Noticed on Arch + Sway, cannot reproduce on Ubuntu 22.04.) // On X11, as libinput(4) indicates, the delta will always be 1.0. if ((delta += event->delta_y) <= -1) set_item_size(self, self->item_size + 1); else if (delta >= +1) set_item_size(self, self->item_size - 1); else if (!event->is_stop) return GDK_EVENT_STOP; delta = 0; return GDK_EVENT_STOP; default: // Left/right are good to steal from GtkScrolledWindow for consistency. return GDK_EVENT_STOP; } } static void fiv_browser_drag_begin(GtkWidget *widget, GdkDragContext *context) { FivBrowser *self = FIV_BROWSER(widget); if (self->selected) { // There doesn't seem to be a size limit. gtk_drag_set_icon_surface(context, self->selected->thumbnail); } } static void fiv_browser_drag_data_get(GtkWidget *widget, G_GNUC_UNUSED GdkDragContext *context, GtkSelectionData *data, G_GNUC_UNUSED guint info, G_GNUC_UNUSED guint time) { FivBrowser *self = FIV_BROWSER(widget); if (self->selected) { (void) gtk_selection_data_set_uris(data, (gchar *[]) {(gchar *) entry_system_wide_uri(self->selected), NULL}); } } static void select_closest(FivBrowser *self, const Row *row, int target) { int closest = G_MAXINT; for (guint i = 0; i < row->len; i++) { GdkRectangle extents = item_extents(self, row->items + i, row); int distance = ABS(extents.x + extents.width / 2 - target); if (distance > closest) break; self->selected = row->items[i].entry; closest = distance; } } static void scroll_to_row(FivBrowser *self, const Row *row) { if (!self->vadjustment) return; double y1 = gtk_adjustment_get_value(self->vadjustment); double ph = gtk_adjustment_get_page_size(self->vadjustment); double sh = self->item_border_y + row_subheight(self, row); if (row->y_offset < y1) { gtk_adjustment_set_value( self->vadjustment, row->y_offset - self->item_border_y); } else if (row->y_offset + self->item_height + sh > y1 + ph) { gtk_adjustment_set_value( self->vadjustment, row->y_offset - ph + self->item_height + sh); } } static void move_selection(FivBrowser *self, GtkDirectionType dir) { GtkWidget *widget = GTK_WIDGET(self); if (!self->layouted_rows->len) return; const Row *selected_row = NULL; if (!self->selected) { switch (dir) { case GTK_DIR_RIGHT: case GTK_DIR_DOWN: selected_row = &g_array_index(self->layouted_rows, Row, 0); self->selected = selected_row->items->entry; goto adjust; case GTK_DIR_LEFT: case GTK_DIR_UP: selected_row = &g_array_index( self->layouted_rows, Row, self->layouted_rows->len - 1); self->selected = selected_row->items[selected_row->len - 1].entry; goto adjust; default: g_assert_not_reached(); } } gsize x = 0, y = 0; int target_offset = 0; for (y = 0; y < self->layouted_rows->len; y++) { const Row *row = &g_array_index(self->layouted_rows, Row, y); for (x = 0; x < row->len; x++) { const Item *item = row->items + x; if (item->entry == self->selected) { GdkRectangle extents = item_extents(self, item, row); target_offset = extents.x + extents.width / 2; goto found; } } } found: g_return_if_fail(y < self->layouted_rows->len); selected_row = &g_array_index(self->layouted_rows, Row, y); switch (dir) { case GTK_DIR_LEFT: if (x > 0) { self->selected = selected_row->items[--x].entry; } else if (y-- > 0) { selected_row = &g_array_index(self->layouted_rows, Row, y); self->selected = selected_row->items[selected_row->len - 1].entry; } break; case GTK_DIR_RIGHT: if (++x < selected_row->len) { self->selected = selected_row->items[x].entry; } else if (++y < self->layouted_rows->len) { selected_row = &g_array_index(self->layouted_rows, Row, y); self->selected = selected_row->items[0].entry; } break; case GTK_DIR_UP: if (y-- > 0) { selected_row = &g_array_index(self->layouted_rows, Row, y); select_closest(self, selected_row, target_offset); } break; case GTK_DIR_DOWN: if (++y < self->layouted_rows->len) { selected_row = &g_array_index(self->layouted_rows, Row, y); select_closest(self, selected_row, target_offset); } break; default: g_assert_not_reached(); } adjust: // TODO(p): We should also do it horizontally, although we don't use it. scroll_to_row(self, selected_row); gtk_widget_queue_draw(widget); } static void move_selection_home(FivBrowser *self) { if (self->layouted_rows->len) { const Row *row = &g_array_index(self->layouted_rows, Row, 0); self->selected = row->items[0].entry; scroll_to_row(self, row); gtk_widget_queue_draw(GTK_WIDGET(self)); } } static void move_selection_end(FivBrowser *self) { if (self->layouted_rows->len) { const Row *row = &g_array_index( self->layouted_rows, Row, self->layouted_rows->len - 1); self->selected = row->items[row->len - 1].entry; scroll_to_row(self, row); gtk_widget_queue_draw(GTK_WIDGET(self)); } } static gboolean fiv_browser_key_press_event(GtkWidget *widget, GdkEventKey *event) { FivBrowser *self = FIV_BROWSER(widget); switch ((event->state & gtk_accelerator_get_default_mod_mask())) { case 0: switch (event->keyval) { case GDK_KEY_Return: if (self->selected) return open_entry(widget, self->selected, FALSE); return GDK_EVENT_STOP; case GDK_KEY_Left: move_selection(self, GTK_DIR_LEFT); return GDK_EVENT_STOP; case GDK_KEY_Right: move_selection(self, GTK_DIR_RIGHT); return GDK_EVENT_STOP; case GDK_KEY_Up: move_selection(self, GTK_DIR_UP); return GDK_EVENT_STOP; case GDK_KEY_Down: move_selection(self, GTK_DIR_DOWN); return GDK_EVENT_STOP; case GDK_KEY_Home: move_selection_home(self); return GDK_EVENT_STOP; case GDK_KEY_End: move_selection_end(self); return GDK_EVENT_STOP; } break; case GDK_MOD1_MASK: switch (event->keyval) { case GDK_KEY_Return: if (self->selected) { GtkWindow *window = GTK_WINDOW(gtk_widget_get_toplevel(widget)); fiv_context_menu_information(window, self->selected->e->uri); } return GDK_EVENT_STOP; } break; case GDK_CONTROL_MASK: case GDK_CONTROL_MASK | GDK_SHIFT_MASK: switch (event->keyval) { case GDK_KEY_plus: set_item_size(self, self->item_size + 1); return GDK_EVENT_STOP; case GDK_KEY_minus: set_item_size(self, self->item_size - 1); return GDK_EVENT_STOP; } } return GTK_WIDGET_CLASS(fiv_browser_parent_class) ->key_press_event(widget, event); } 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); // TODO(p): Consider getting rid of tooltips altogether. if (self->show_labels) return FALSE; const Entry *entry = entry_at(self, x, y); if (!entry) return FALSE; gtk_tooltip_set_text(tooltip, entry->e->display_name); return TRUE; } static gboolean fiv_browser_popup_menu(GtkWidget *widget) { FivBrowser *self = FIV_BROWSER(widget); // This is what Windows Explorer does, and what you want to be done. // Although invoking the menu outside the widget is questionable. GFile *file = NULL; GdkRectangle rect = {}; if (self->selected) { file = g_file_new_for_uri(self->selected->e->uri); rect = entry_rect(self, self->selected); rect.x += rect.width / 2; rect.y += rect.height / 2; } else { file = g_object_ref(fiv_io_model_get_location(self->model)); } gtk_menu_popup_at_rect(fiv_context_menu_new(widget, file), gtk_widget_get_window(widget), &rect, GDK_GRAVITY_NORTH_WEST, GDK_GRAVITY_NORTH_WEST, NULL); g_object_unref(file); return TRUE; } static void on_long_press(GtkGestureLongPress *lp, gdouble x, gdouble y, gpointer user_data) { FivBrowser *self = FIV_BROWSER(user_data); const Entry *entry = entry_at(self, x, y); abort_button_tracking(self); if (!entry) return; GtkGesture *gesture = GTK_GESTURE(lp); GdkEventSequence *sequence = gtk_gesture_get_last_updated_sequence(gesture); const GdkEvent *event = gtk_gesture_get_last_event(gesture, sequence); GtkWidget *widget = GTK_WIDGET(self); GdkWindow *window = gtk_widget_get_window(widget); #ifdef GDK_WINDOWING_X11 // FIXME: Once the finger is lifted, this menu is immediately closed. if (GDK_IS_X11_WINDOW(window)) return; #endif // GDK_WINDOWING_X11 // It might also be possible to have long-press just select items, // and show some kind of toolbar with available actions. GFile *file = g_file_new_for_uri(entry->e->uri); gtk_menu_popup_at_rect(fiv_context_menu_new(widget, file), window, &(GdkRectangle) {.x = x, .y = y}, GDK_GRAVITY_NORTH_WEST, GDK_GRAVITY_NORTH_WEST, event); g_object_unref(file); self->selected = entry; gtk_widget_queue_draw(widget); } 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); // XXX: Right now, specifying custom fonts within our CSS pseudo-regions // has no effect, so it might be appropriate to also add .label/.symbolic // classes here, remember the resulting GTK_STYLE_PROPERTY_FONT, // and apply them in relayout() with pango_layout_set_font_description(). // There is virtually nothing to be gained from this flexibility, though. // XXX: We should also invoke relayout() here, because different states // might theoretically use different fonts. gtk_style_context_restore(style); self->glow_w = (margin.left + margin.right) / 2; self->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 = self->glow_w + (border.left + border.right) / 2; int item_border_y = self->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_padded) cairo_pattern_destroy(self->glow_padded); if (self->glow) cairo_pattern_destroy(self->glow); cairo_surface_t *corner = cairo_image_surface_create( CAIRO_FORMAT_A8, MAX(0, self->glow_w), MAX(0, self->glow_h)); unsigned char *data = cairo_image_surface_get_data(corner); int stride = cairo_image_surface_get_stride(corner); // 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 = self->glow_w - 1; const int y_max = self->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(corner); self->glow = cairo_pattern_create_for_surface(corner); self->glow_padded = cairo_pattern_create_for_surface(corner); cairo_pattern_set_extend(self->glow_padded, CAIRO_EXTEND_PAD); #ifdef GDK_WINDOWING_QUARTZ // Cairo's Quartz backend doesn't support CAIRO_EXTEND_PAD, work around it. if (GDK_IS_QUARTZ_DISPLAY(gtk_widget_get_display(widget))) { int max_size = fiv_thumbnail_sizes[FIV_THUMBNAIL_SIZE_MAX].size; cairo_surface_t *padded = cairo_image_surface_create(CAIRO_FORMAT_A8, cairo_image_surface_get_width(corner) + max_size * FIV_THUMBNAIL_WIDE_COEFFICIENT, cairo_image_surface_get_height(corner) + max_size); cairo_t *cr = cairo_create(padded); cairo_set_source(cr, self->glow_padded); cairo_paint(cr); cairo_destroy(cr); cairo_pattern_destroy(self->glow_padded); self->glow_padded = cairo_pattern_create_for_surface(padded); cairo_surface_destroy(padded); } #endif // GDK_WINDOWING_QUARTZ cairo_surface_destroy(corner); } 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_THUMBNAIL_SIZE, FIV_THUMBNAIL_SIZE_NORMAL, G_PARAM_READWRITE); browser_properties[PROP_SHOW_LABELS] = g_param_spec_boolean( "show-labels", "Show labels", "Whether to show filename labels", FALSE, G_PARAM_READWRITE); g_object_class_install_properties( object_class, N_PROPERTIES, browser_properties); g_object_class_override_property( object_class, PROP_HADJUSTMENT, "hadjustment"); g_object_class_override_property( object_class, PROP_VADJUSTMENT, "vadjustment"); g_object_class_override_property( object_class, PROP_HSCROLL_POLICY, "hscroll-policy"); g_object_class_override_property( object_class, PROP_VSCROLL_POLICY, "vscroll-policy"); 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->button_release_event = fiv_browser_button_release_event; widget_class->motion_notify_event = fiv_browser_motion_notify_event; widget_class->drag_begin = fiv_browser_drag_begin; widget_class->drag_data_get = fiv_browser_drag_data_get; widget_class->scroll_event = fiv_browser_scroll_event; widget_class->key_press_event = fiv_browser_key_press_event; widget_class->query_tooltip = fiv_browser_query_tooltip; widget_class->popup_menu = fiv_browser_popup_menu; 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_ptr_array_new_with_free_func((GDestroyNotify) entry_destroy); self->layouted_rows = g_array_new(FALSE, TRUE, sizeof(Row)); g_array_set_clear_func(self->layouted_rows, (GDestroyNotify) row_free); abort_button_tracking(self); self->thumbnail_cache = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, (GDestroyNotify) cairo_surface_destroy); self->thumbnailers_len = g_get_num_processors(); self->thumbnailers = g_malloc0_n(self->thumbnailers_len, sizeof *self->thumbnailers); for (size_t i = 0; i < self->thumbnailers_len; i++) self->thumbnailers[i].self = self; g_queue_init(&self->thumbnailers_queue); set_item_size(self, FIV_THUMBNAIL_SIZE_NORMAL); self->show_labels = FALSE; self->glow_padded = cairo_pattern_create_rgba(0, 0, 0, 0); self->glow = cairo_pattern_create_rgba(0, 0, 0, 0); g_signal_connect_swapped(gtk_settings_get_default(), "notify::gtk-icon-theme-name", G_CALLBACK(reload_thumbnails), self); GtkGesture *lp = gtk_gesture_long_press_new(GTK_WIDGET(self)); gtk_gesture_single_set_touch_only(GTK_GESTURE_SINGLE(lp), TRUE); gtk_event_controller_set_propagation_phase( GTK_EVENT_CONTROLLER(lp), GTK_PHASE_BUBBLE); g_object_set_data_full( G_OBJECT(self), "fiv-browser-long-press-gesture", lp, g_object_unref); g_signal_connect(lp, "pressed", G_CALLBACK(on_long_press), self); } // --- Public interface -------------------------------------------------------- static void on_model_reloaded(FivIoModel *model, FivBrowser *self) { g_return_if_fail(model == self->model); gchar *selected_uri = NULL; if (self->selected) selected_uri = g_strdup(self->selected->e->uri); thumbnailers_abort(self); g_array_set_size(self->layouted_rows, 0); g_ptr_array_set_size(self->entries, 0); gsize len = 0; FivIoModelEntry *const *files = fiv_io_model_get_files(self->model, &len); for (gsize i = 0; i < len; i++) { g_ptr_array_add( self->entries, entry_new(fiv_io_model_entry_ref(files[i]))); } fiv_browser_select(self, selected_uri); g_free(selected_uri); reload_thumbnails(self); thumbnailers_start(self); } static void on_model_changed(FivIoModel *model, FivIoModelEntry *old, FivIoModelEntry *new, FivBrowser *self) { g_return_if_fail(model == self->model); // Add new entries to the end, so as to not disturb the layout. if (!old) { g_ptr_array_add( self->entries, entry_new(fiv_io_model_entry_ref(new))); // TODO(p): Only process this one item, not everything at once. // (This mainly has an effect on thumbnail-less entries.) reload_thumbnails(self); thumbnailers_start(self); return; } Entry *found = NULL; for (guint i = 0; i < self->entries->len; i++) { Entry *entry = self->entries->pdata[i]; if (entry->e == old) { found = entry; break; } } if (!found) return; // Rename entries in place, so as to not disturb the layout. // XXX: This behaves differently from FivIoModel, and by extension fiv.c. if (new) { fiv_io_model_entry_unref(found->e); found->e = fiv_io_model_entry_ref(new); found->removed = FALSE; // TODO(p): If there is a URI mismatch, don't reload thumbnails, // so that there's no jumping around. Or, a bit more properly, // move the thumbnail cache entry to the new URI. // TODO(p): Only process this one item, not everything at once. // (This mainly has an effect on thumbnail-less entries.) reload_thumbnails(self); thumbnailers_start(self); } else { found->removed = TRUE; gtk_widget_queue_draw(GTK_WIDGET(self)); } } GtkWidget * fiv_browser_new(FivIoModel *model) { g_return_val_if_fail(FIV_IS_IO_MODEL(model), NULL); FivBrowser *self = g_object_new(FIV_TYPE_BROWSER, NULL); self->model = g_object_ref(model); g_signal_connect(self->model, "reloaded", G_CALLBACK(on_model_reloaded), self); g_signal_connect(self->model, "files-changed", G_CALLBACK(on_model_changed), self); on_model_reloaded(self->model, self); return GTK_WIDGET(self); } static void scroll_to_selection(FivBrowser *self) { for (gsize y = 0; y < self->layouted_rows->len; y++) { const Row *row = &g_array_index(self->layouted_rows, Row, y); for (gsize x = 0; x < row->len; x++) { if (row->items[x].entry == self->selected) { scroll_to_row(self, row); return; } } } } void fiv_browser_select(FivBrowser *self, const char *uri) { g_return_if_fail(FIV_IS_BROWSER(self)); self->selected = NULL; gtk_widget_queue_draw(GTK_WIDGET(self)); if (!uri) return; for (guint i = 0; i < self->entries->len; i++) { const Entry *entry = self->entries->pdata[i]; if (!g_strcmp0(entry->e->uri, uri)) { self->selected = entry; scroll_to_selection(self); break; } } }