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Add a prototype of a directory view widget

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This commit is contained in:
Přemysl Eric Janouch 2021-10-17 15:38:27 +02:00
parent dff4e316bb
commit de9e91e9a5
Signed by: p
GPG Key ID: A0420B94F92B9493
6 changed files with 298 additions and 11 deletions
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233
fastiv-browser.c Normal file
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@ -0,0 +1,233 @@
//
// fastiv-browser.c: fast image viewer - filesystem browser widget
//
// Copyright (c) 2021, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include <math.h>
#include "fastiv-browser.h"
#include "fastiv-view.h"
typedef struct entry Entry;
struct entry {
char *filename;
cairo_surface_t *thumbnail;
};
static void
entry_free(Entry *self)
{
g_free(self->filename);
if (self->thumbnail)
cairo_surface_destroy(self->thumbnail);
}
// --- Boilerplate -------------------------------------------------------------
struct _FastivBrowser {
GtkWidget parent_instance;
// TODO(p): We probably want to pre-arrange everything into rows.
// - All rows are the same height.
GArray *entries;
int selected;
};
// TODO(p): For proper navigation, we need to implement GtkScrollable.
G_DEFINE_TYPE_EXTENDED(FastivBrowser, fastiv_browser, GTK_TYPE_WIDGET, 0,
/* G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE,
fastiv_browser_scrollable_init) */)
enum {
ITEM_ACTIVATED,
LAST_SIGNAL,
};
// Globals are, sadly, the canonical way of storing signal numbers.
static guint browser_signals[LAST_SIGNAL];
static void
fastiv_browser_finalize(GObject *gobject)
{
G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(gobject);
G_OBJECT_CLASS(fastiv_browser_parent_class)->finalize(gobject);
}
static GtkSizeRequestMode
fastiv_browser_get_request_mode(G_GNUC_UNUSED GtkWidget *widget)
{
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
static void
fastiv_browser_get_preferred_width(GtkWidget *widget,
gint *minimum, gint *natural)
{
G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(widget);
// TODO(p): Set it to the width of the widget with one wide item within.
*minimum = *natural = 0;
}
static void
fastiv_browser_get_preferred_height_for_width(GtkWidget *widget,
G_GNUC_UNUSED gint width, gint *minimum, gint *natural)
{
G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(widget);
// TODO(p): Re-layout, figure it out.
*minimum = *natural = 0;
}
static void
fastiv_browser_realize(GtkWidget *widget)
{
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
GdkWindowAttr attributes = {
.window_type = GDK_WINDOW_CHILD,
.x = allocation.x,
.y = allocation.y,
.width = allocation.width,
.height = allocation.height,
// Input-only would presumably also work (as in GtkPathBar, e.g.),
// but it merely seems to involve more work.
.wclass = GDK_INPUT_OUTPUT,
.visual = gtk_widget_get_visual(widget),
.event_mask = gtk_widget_get_events(widget)
| GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK,
};
// We need this window to receive input events at all.
// TODO(p): See if input events bubble up to parents.
GdkWindow *window = gdk_window_new(gtk_widget_get_parent_window(widget),
&attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL);
gtk_widget_register_window(widget, window);
gtk_widget_set_window(widget, window);
gtk_widget_set_realized(widget, TRUE);
}
static gboolean
fastiv_browser_draw(GtkWidget *widget, cairo_t *cr)
{
G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(widget);
if (!gtk_cairo_should_draw_window(cr, gtk_widget_get_window(widget)))
return TRUE;
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
gtk_render_background(gtk_widget_get_style_context(widget), cr,
0, 0, allocation.width, allocation.height);
const double row_height = 256;
gint occupied_width = 0, y = 0;
for (guint i = 0; i < self->entries->len; i++) {
const Entry *entry = &g_array_index(self->entries, Entry, i);
if (!entry->thumbnail)
continue;
int width = cairo_image_surface_get_width(entry->thumbnail);
int height = cairo_image_surface_get_height(entry->thumbnail);
double scale = row_height / height;
if (width * scale > 2 * row_height)
scale = 2 * row_height / width;
int projected_width = round(scale * width);
int projected_height = round(scale * height);
if (occupied_width != 0
&& occupied_width + projected_width > allocation.width) {
occupied_width = 0;
y += row_height;
}
cairo_save(cr);
cairo_translate(cr, occupied_width, y + row_height - projected_height);
cairo_scale(cr, scale, scale);
cairo_set_source_surface(cr, entry->thumbnail, 0, 0);
cairo_paint(cr);
cairo_restore(cr);
occupied_width += projected_width;
}
return TRUE;
}
static void
fastiv_browser_class_init(FastivBrowserClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS(klass);
object_class->finalize = fastiv_browser_finalize;
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
widget_class->get_request_mode = fastiv_browser_get_request_mode;
widget_class->get_preferred_width =
fastiv_browser_get_preferred_width;
widget_class->get_preferred_height_for_width =
fastiv_browser_get_preferred_height_for_width;
widget_class->realize = fastiv_browser_realize;
widget_class->draw = fastiv_browser_draw;
// TODO(p): Connect to this and emit it.
browser_signals[ITEM_ACTIVATED] =
g_signal_new("item-activated", G_TYPE_FROM_CLASS(klass),
0, 0, NULL, NULL, NULL, G_TYPE_NONE, 0);
// TODO(p): Later override "screen_changed", recreate Pango layouts there,
// if we get to have any, or otherwise reflect DPI changes.
gtk_widget_class_set_css_name(widget_class, "fastiv-browser");
}
static void
fastiv_browser_init(FastivBrowser *self)
{
gtk_widget_set_can_focus(GTK_WIDGET(self), TRUE);
self->entries = g_array_new(FALSE, TRUE, sizeof(Entry));
g_array_set_clear_func(self->entries, (GDestroyNotify) entry_free);
self->selected = -1;
}
void
fastiv_browser_load(FastivBrowser *self, const char *path)
{
g_array_set_size(self->entries, 0);
// TODO(p): Use opendir(), in order to get file type directly.
GDir *dir = g_dir_open(path, 0, NULL);
if (!dir)
return;
const char *filename;
while ((filename = g_dir_read_name(dir))) {
if (!strcmp(filename, ".")
|| !strcmp(filename, ".."))
continue;
gchar *subpath = g_build_filename(path, filename, NULL);
g_array_append_val(self->entries, ((Entry) {
.thumbnail = fastiv_io_lookup_thumbnail(subpath),
.filename = subpath,
}));
}
g_dir_close(dir);
// TODO(p): Sort the entries.
gtk_widget_queue_draw(GTK_WIDGET(self));
}

25
fastiv-browser.h Normal file
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@ -0,0 +1,25 @@
//
// fastiv-browser.h: fast image viewer - filesystem browser widget
//
// Copyright (c) 2021, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#pragma once
#include <gtk/gtk.h>
#define FASTIV_TYPE_BROWSER (fastiv_browser_get_type())
G_DECLARE_FINAL_TYPE(FastivBrowser, fastiv_browser, FASTIV, BROWSER, GtkWidget)
void fastiv_browser_load(FastivBrowser *self, const char *path);

17
fastiv-io.c
View File

@ -482,11 +482,11 @@ check_png_thumbnail(png_structp pngp, png_infop infop, const gchar *target,
// TODO(p): Support spng as well (it can't premultiply alpha by itself,
// but at least it won't gamma-adjust it for us).
static cairo_surface_t *
read_png_thumbnail(const gchar *filename, const gchar *target, time_t mtime,
read_png_thumbnail(const gchar *path, const gchar *uri, time_t mtime,
GError **error)
{
FILE *fp;
if (!(fp = fopen(filename, "rb"))) {
if (!(fp = fopen(path, "rb"))) {
set_error(error, g_strerror(errno));
return NULL;
}
@ -514,7 +514,7 @@ read_png_thumbnail(const gchar *filename, const gchar *target, time_t mtime,
// XXX: libpng will premultiply with the alpha, but it also gamma-adjust it.
png_set_alpha_mode(pngp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB);
png_read_info(pngp, infop);
if (check_png_thumbnail(pngp, infop, target, mtime) == FALSE)
if (check_png_thumbnail(pngp, infop, uri, mtime) == FALSE)
png_error(pngp, "mismatch");
// Asking for at least 8-bit channels. This call is a superset of:
@ -572,7 +572,7 @@ read_png_thumbnail(const gchar *filename, const gchar *target, time_t mtime,
// The specification does not say where the required metadata should be,
// it could very well be broken up into two parts.
png_read_end(pngp, infop);
if (check_png_thumbnail(pngp, infop, target, mtime) != TRUE)
if (check_png_thumbnail(pngp, infop, uri, mtime) != TRUE)
png_error(pngp, "mismatch or not a thumbnail");
fail:
@ -601,10 +601,15 @@ fastiv_io_lookup_thumbnail(const gchar *target)
cairo_surface_t *result = NULL;
const gchar *sizes[] = {"large", "x-large", "xx-large", "normal"};
GError *error = NULL;
for (gsize i = 0; !result && i < G_N_ELEMENTS(sizes); i++) {
gchar *path = g_strdup_printf("%s/thumbnails/%s/%s.png",
cache_dir, "large", sum);
result = read_png_thumbnail(path, target, st.st_mtim.tv_sec, NULL);
cache_dir, sizes[i], sum);
result = read_png_thumbnail(path, uri, st.st_mtim.tv_sec, &error);
if (error) {
g_debug("%s: %s", path, error->message);
g_clear_error(&error);
}
g_free(path);
}

3
fastiv-view.h
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@ -19,7 +19,7 @@
#include <gtk/gtk.h>
#define FASTIV_TYPE_VIEW (fastiv_view_get_type ())
#define FASTIV_TYPE_VIEW (fastiv_view_get_type())
G_DECLARE_FINAL_TYPE(FastivView, fastiv_view, FASTIV, VIEW, GtkWidget)
/// Try to open the given file, synchronously, to be displayed by the widget.
@ -27,3 +27,4 @@ gboolean fastiv_view_open(FastivView *self, const gchar *path, GError **error);
// Private, fastiv-io.c
cairo_surface_t *fastiv_io_open(const gchar *path, GError **error);
cairo_surface_t *fastiv_io_lookup_thumbnail(const gchar *target);

30
fastiv.c
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@ -28,6 +28,7 @@
#include "config.h"
#include "fastiv-view.h"
#include "fastiv-browser.h"
// --- Utilities ---------------------------------------------------------------
@ -246,6 +247,8 @@ struct {
GtkWidget *window;
GtkWidget *view;
GtkWidget *browser;
GtkWidget *browser_scroller;
} g;
static gboolean
@ -288,6 +291,8 @@ load_directory(const gchar *dirname)
g_ptr_array_set_size(g.files, 0);
g.files_index = -1;
fastiv_browser_load(FASTIV_BROWSER(g.browser), dirname);
GError *error = NULL;
GDir *dir = g_dir_open(dirname, 0, &error);
if (dir) {
@ -429,16 +434,32 @@ main(int argc, char *argv[])
gtk_window_set_default_icon_name(PROJECT_NAME);
const char *style = "fastiv-view { background: black; }";
const char *style = "fastiv-view, fastiv-browser { background: black; }";
GtkCssProvider *provider = gtk_css_provider_new();
gtk_css_provider_load_from_data(provider, style, strlen(style), NULL);
gtk_style_context_add_provider_for_screen(gdk_screen_get_default(),
GTK_STYLE_PROVIDER(provider), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
g.view = g_object_new(FASTIV_TYPE_VIEW, NULL);
gtk_widget_show_all(g.view);
g.browser_scroller = gtk_scrolled_window_new(NULL, NULL);
g.browser = g_object_new(FASTIV_TYPE_BROWSER, NULL);
gtk_widget_set_vexpand(g.browser, TRUE);
gtk_widget_set_hexpand(g.browser, TRUE);
gtk_container_add(GTK_CONTAINER(g.browser_scroller), g.browser);
// TODO(p): Can we not do it here separately?
gtk_widget_show_all(g.browser_scroller);
GtkWidget *stack = gtk_stack_new();
gtk_stack_set_transition_type(
GTK_STACK(stack), GTK_STACK_TRANSITION_TYPE_NONE);
gtk_container_add(GTK_CONTAINER(stack), g.view);
gtk_container_add(GTK_CONTAINER(stack), g.browser_scroller);
g.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(g.window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
gtk_container_add(GTK_CONTAINER(g.window), g.view);
gtk_container_add(GTK_CONTAINER(g.window), stack);
// The references to closures are initially floating and sunk on connect.
GtkAccelGroup *accel_group = gtk_accel_group_new();
@ -491,8 +512,9 @@ main(int argc, char *argv[])
}
g_free(cwd);
// TODO(p): When no picture is loaded, show a view of this directory
// (we're missing a widget for that).
if (g.files_index < 0)
gtk_stack_set_visible_child(GTK_STACK(stack), g.browser_scroller);
gtk_widget_show_all(g.window);
gtk_main();
return 0;

1
meson.build
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@ -20,6 +20,7 @@ configure_file(
)
executable('fastiv', 'fastiv.c', 'fastiv-view.c', 'fastiv-io.c',
'fastiv-browser.c',
install : true,
dependencies : [dependencies])