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using Gee;
using Gdk;
using Gtk;
using Xmpp;
using Dino.Entities;
namespace Dino.Ui {
public class FileImageWidget : Box {
enum State {
EMPTY,
PREVIEW,
IMAGE
}
private State state = State.EMPTY;
private Stack stack = new Stack() { transition_duration=600, transition_type=StackTransitionType.CROSSFADE };
private Overlay overlay = new Overlay();
private bool show_image_overlay_toolbar = false;
private Gtk.Box image_overlay_toolbar = new Gtk.Box(Orientation.VERTICAL, 0) { halign=Align.END, valign=Align.START, margin_top=10, margin_start=10, margin_end=10, margin_bottom=10, vexpand=false, visible=false };
private Label file_size_label = new Label(null) { halign=Align.START, valign=Align.END, margin_bottom=4, margin_start=4, visible=false };
private FileTransfer file_transfer;
private FileTransmissionProgress transmission_progress = new FileTransmissionProgress() { halign=Align.CENTER, valign=Align.CENTER, visible=false };
public FileImageWidget(int MAX_WIDTH=600, int MAX_HEIGHT=300) {
this.halign = Align.START;
this.add_css_class("file-image-widget");
// Setup menu button overlay
MenuButton button = new MenuButton();
button.icon_name = "view-more";
Menu menu_model = new Menu();
menu_model.append(_("Open"), "file.open");
menu_model.append(_("Save as…"), "file.save_as");
Gtk.PopoverMenu popover_menu = new Gtk.PopoverMenu.from_model(menu_model);
button.popover = popover_menu;
image_overlay_toolbar.append(button);
image_overlay_toolbar.add_css_class("card");
image_overlay_toolbar.add_css_class("toolbar");
image_overlay_toolbar.add_css_class("overlay-toolbar");
image_overlay_toolbar.set_cursor_from_name("default");
file_size_label.add_css_class("file-details");
overlay.set_child(stack);
overlay.set_measure_overlay(stack, true);
overlay.add_overlay(file_size_label);
overlay.add_overlay(transmission_progress);
overlay.add_overlay(image_overlay_toolbar);
overlay.set_clip_overlay(image_overlay_toolbar, true);
this.append(overlay);
GestureClick gesture_click_controller = new GestureClick();
gesture_click_controller.button = 1; // listen for left clicks
gesture_click_controller.released.connect(on_image_clicked);
stack.add_controller(gesture_click_controller);
EventControllerMotion this_motion_events = new EventControllerMotion();
this.add_controller(this_motion_events);
this_motion_events.enter.connect(() => {
image_overlay_toolbar.visible = show_image_overlay_toolbar;
file_size_label.visible = file_transfer != null && file_transfer.direction == FileTransfer.DIRECTION_RECEIVED && file_transfer.state == FileTransfer.State.NOT_STARTED && !file_transfer.sfs_sources.is_empty;
});
this_motion_events.leave.connect(() => {
if (button.popover != null && button.popover.visible) return;
image_overlay_toolbar.visible = false;
file_size_label.visible = false;
});
}
public async void set_file_transfer(FileTransfer file_transfer) {
this.file_transfer = file_transfer;
this.file_transfer.bind_property("size", file_size_label, "label", BindingFlags.SYNC_CREATE, (_, from_value, ref to_value) => {
to_value = FileDefaultWidget.get_size_string((int64) from_value);
return true;
});
this.file_transfer.bind_property("size", transmission_progress, "file-size", BindingFlags.SYNC_CREATE);
this.file_transfer.bind_property("transferred-bytes", transmission_progress, "transferred-size");
file_transfer.notify["state"].connect(refresh_state);
file_transfer.sources_changed.connect(refresh_state);
refresh_state();
}
private void refresh_state() {
if ((state == EMPTY || state == PREVIEW) && file_transfer.path != null) {
if (state == EMPTY) {
load_from_file.begin(file_transfer.get_file(), file_transfer.file_name);
show_image_overlay_toolbar = true;
} if (state == PREVIEW) {
Timeout.add(500, () => {
load_from_file.begin(file_transfer.get_file(), file_transfer.file_name);
show_image_overlay_toolbar = true;
return false;
});
}
this.set_cursor_from_name("zoom-in");
state = IMAGE;
} else if (state == EMPTY && file_transfer.thumbnails.size > 0) {
load_from_thumbnail.begin(file_transfer);
transmission_progress.visible = true;
show_image_overlay_toolbar = false;
state = PREVIEW;
}
if (file_transfer.state == IN_PROGRESS || file_transfer.state == NOT_STARTED || file_transfer.state == FAILED) {
transmission_progress.visible = true;
show_image_overlay_toolbar = false;
} else if (transmission_progress.visible) {
Timeout.add(500, () => {
transmission_progress.transferred_size = transmission_progress.file_size;
transmission_progress.visible = false;
show_image_overlay_toolbar = true;
return false;
});
}
if (file_transfer.state == FileTransfer.State.IN_PROGRESS) {
if (file_transfer.direction == FileTransfer.DIRECTION_RECEIVED) {
transmission_progress.state = FileTransmissionProgress.State.DOWNLOADING;
} else {
transmission_progress.state = FileTransmissionProgress.State.UPLOADING;
}
} else if (file_transfer.sfs_sources.is_empty) {
transmission_progress.state = UNKNOWN_SOURCE;
} else if (file_transfer.state == NOT_STARTED && file_transfer.direction == FileTransfer.DIRECTION_RECEIVED) {
transmission_progress.state = DOWNLOAD_NOT_STARTED;
} else if (file_transfer.state == FileTransfer.State.FAILED) {
transmission_progress.state = DOWNLOAD_NOT_STARTED_FAILED_BEFORE;
}
}
public async void load_from_file(File file, string file_name) throws GLib.Error {
FixedRatioPicture image = new FixedRatioPicture() { min_width=100, min_height=100, max_width=600, max_height=300 };
image.file = file;
stack.add_child(image);
stack.set_visible_child(image);
}
public async void load_from_thumbnail(FileTransfer file_transfer) throws GLib.Error {
this.file_transfer = file_transfer;
Gdk.Pixbuf? pixbuf = null;
foreach (Xep.JingleContentThumbnails.Thumbnail thumbnail in file_transfer.thumbnails) {
pixbuf = parse_thumbnail(thumbnail);
if (pixbuf != null) {
break;
}
}
if (pixbuf == null) {
warning("Can't load thumbnails of file %s", file_transfer.file_name);
throw new Error(-1, 0, "Error loading preview image");
}
// TODO: should this be executed? If yes, before or after scaling
pixbuf = pixbuf.apply_embedded_orientation();
if (file_transfer.width > 0 && file_transfer.height > 0) {
pixbuf = pixbuf.scale_simple(file_transfer.width, file_transfer.height, InterpType.BILINEAR);
} else {
warning("Preview: Not scaling image, width: %d, height: %d\n", file_transfer.width, file_transfer.height);
}
if (pixbuf == null) {
warning("Can't scale thumbnail %s", file_transfer.file_name);
throw new Error(-1, 0, "Error scaling preview image");
}
FixedRatioPicture image = new FixedRatioPicture() { min_width=100, min_height=100, max_width=600, max_height=300 };
image.paintable = Texture.for_pixbuf(pixbuf);
stack.add_child(image);
stack.set_visible_child(image);
}
public void on_image_clicked(GestureClick gesture_click_controller, int n_press, double x, double y) {
if (this.file_transfer.state != COMPLETE) return;
switch (gesture_click_controller.get_device().source) {
case Gdk.InputSource.TOUCHSCREEN:
case Gdk.InputSource.PEN:
if (n_press == 1) {
image_overlay_toolbar.visible = !image_overlay_toolbar.visible;
} else if (n_press == 2) {
this.activate_action("file.open", null);
image_overlay_toolbar.visible = false;
}
break;
default:
this.activate_action("file.open", null);
image_overlay_toolbar.visible = false;
break;
}
}
public static Pixbuf? parse_thumbnail(Xep.JingleContentThumbnails.Thumbnail thumbnail) {
string[] splits = thumbnail.uri.split(":", 2);
if (splits.length != 2) {
warning("Thumbnail parsing error: ':' not found");
return null;
}
if (splits[0] != "data") {
warning("Unsupported thumbnail: unimplemented uri type\n");
return null;
}
splits = splits[1].split(";", 2);
if (splits.length != 2) {
warning("Thumbnail parsing error: ';' not found");
return null;
}
if (splits[0] != "image/png") {
warning("Unsupported thumbnail: unsupported mime-type\n");
return null;
}
splits = splits[1].split(",", 2);
if (splits.length != 2) {
warning("Thumbnail parsing error: ',' not found");
return null;
}
if (splits[0] != "base64") {
warning("Unsupported thumbnail: data is not base64 encoded\n");
return null;
}
uint8[] data = Base64.decode(splits[1]);
MemoryInputStream input_stream = new MemoryInputStream.from_data(data);
Pixbuf pixbuf = new Pixbuf.from_stream(input_stream);
return pixbuf;
}
public static bool can_display(FileTransfer file_transfer) {
return file_transfer.mime_type != null && is_pixbuf_supported_mime_type(file_transfer.mime_type) &&
(file_transfer.state == FileTransfer.State.COMPLETE || file_transfer.thumbnails.size > 0);
}
public static bool is_pixbuf_supported_mime_type(string mime_type) {
if (mime_type == null) return false;
foreach (PixbufFormat pixbuf_format in Pixbuf.get_formats()) {
foreach (string pixbuf_mime in pixbuf_format.get_mime_types()) {
if (pixbuf_mime == mime_type) return true;
}
}
return false;
}
}
}
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