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fiv/fiv-browser.c

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//
// fiv-browser.c: filesystem browsing widget
//
// Copyright (c) 2021 - 2023, 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 "config.h"
#include <math.h>
#include <pixman.h>
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif // GDK_WINDOWING_X11
#ifdef GDK_WINDOWING_QUARTZ
#include <gdk/gdkquartz.h>
#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 || item->entry->removed) {
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 {
// Distinguish removed items by rendering them only faintly.
if (item->entry->removed)
cairo_push_group(cr);
cairo_set_source_surface(
cr, item->entry->thumbnail, border.left, border.top);
cairo_paint(cr);
// Here, we could also consider multiplying
// the whole rectangle with the selection color.
if (item->entry->removed) {
cairo_pop_group_to_source(cr);
cairo_paint_with_alpha(cr, 0.25);
}
}
// This rendition is about the best I could come up with.
// It might be possible to use more such emblems with entries,
// though they would deserve some kind of a blur-glow.
if (item->entry->removed) {
int size = 32;
cairo_surface_t *cross = gtk_icon_theme_load_surface(
gtk_icon_theme_get_default(), "cross-large-symbolic",
size, gtk_widget_get_scale_factor(GTK_WIDGET(self)),
gtk_widget_get_window(GTK_WIDGET(self)),
GTK_ICON_LOOKUP_FORCE_SYMBOLIC, NULL);
if (cross) {
cairo_set_source_rgb(cr, 1, 0, 0);
cairo_mask_surface(cr, cross,
border.left + extents.width - size - size / 4,
border.top + extents.height - size - size / 4);
cairo_surface_destroy(cross);
}
}
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_one_thumbnail_finish(FivBrowser *self, Entry *entry)
{
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);
}
static void
reload_one_thumbnail(FivBrowser *self, Entry *entry)
{
entry_add_thumbnail(entry, self);
reload_one_thumbnail_finish(self, entry);
gtk_widget_queue_resize(GTK_WIDGET(self));
}
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++)
reload_one_thumbnail_finish(self, self->entries->pdata[i]);
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) {
Entry *entry = entry_new(fiv_io_model_entry_ref(new));
g_ptr_array_add(self->entries, entry);
reload_one_thumbnail(self, entry);
// TODO(p): Try to add to thumbnailer queue if already started.
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.
reload_one_thumbnail(self, found);
// TODO(p): Try to add to thumbnailer queue if already started.
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;
}
}
}
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