Imported Upstream version 0.18.1upstream/0.18.1

1 files changed, 1799 insertions, 0 deletions

diff --git a/src/camera/ImportPage.vala b/src/camera/ImportPage.vala
new file mode 100644
index 0000000..823a458
--- /dev/null
+++ b/src/camera/ImportPage.vala
@@ -0,0 +1,1799 @@
+/* Copyright 2009-2014 Yorba Foundation
+ *
+ * This software is licensed under the GNU LGPL (version 2.1 or later).
+ * See the COPYING file in this distribution.
+ */
+
+private class ImportSourceCollection : SourceCollection {
+    public ImportSourceCollection(string name) {
+        base (name);
+    }
+    
+    public override bool holds_type_of_source(DataSource source) {
+        return source is ImportSource;
+    }
+}
+
+abstract class ImportSource : ThumbnailSource, Indexable {
+    private string camera_name;
+    private GPhoto.Camera camera;
+    private int fsid;
+    private string folder;
+    private string filename;
+    private ulong file_size;
+    private time_t modification_time;
+    private Gdk.Pixbuf? preview = null;
+    private string? indexable_keywords = null;
+    
+    public ImportSource(string camera_name, GPhoto.Camera camera, int fsid, string folder,
+        string filename, ulong file_size, time_t modification_time) {
+        this.camera_name = camera_name;
+        this.camera = camera;
+        this.fsid = fsid;
+        this.folder = folder;
+        this.filename = filename;
+        this.file_size = file_size;
+        this.modification_time = modification_time;
+        indexable_keywords = prepare_indexable_string(filename);
+    }
+    
+    protected void set_preview(Gdk.Pixbuf? preview) {
+        this.preview = preview;
+    }
+    
+    public string get_camera_name() {
+        return camera_name;
+    }
+    
+    public GPhoto.Camera get_camera() {
+        return camera;
+    }
+    
+    public int get_fsid() {
+        return fsid;
+    }
+    
+    public string get_folder() {
+        return folder;
+    }
+    
+    public string get_filename() {
+        return filename;
+    }
+    
+    public ulong get_filesize() {
+        return file_size;
+    }
+    
+    public time_t get_modification_time() {
+        return modification_time;
+    }
+    
+    public virtual Gdk.Pixbuf? get_preview() {
+        return preview;
+    }
+
+    public virtual time_t get_exposure_time() {
+        return get_modification_time();
+    }
+
+    public string? get_fulldir() {
+        return ImportPage.get_fulldir(get_camera(), get_camera_name(), get_fsid(), get_folder());
+    }
+
+    public override string to_string() {
+        return "%s %s/%s".printf(get_camera_name(), get_folder(), get_filename());
+    }
+    
+    public override bool internal_delete_backing() throws Error {
+        debug("Deleting %s from %s", to_string(), camera_name);
+        
+        string? fulldir = get_fulldir();
+        if (fulldir == null) {
+            warning("Skipping deleting %s from %s: invalid folder name", to_string(), camera_name);
+            
+            return base.internal_delete_backing();
+        }
+        
+        GPhoto.Result result = get_camera().delete_file(fulldir, get_filename(),
+            ImportPage.spin_idle_context.context);
+        if (result != GPhoto.Result.OK)
+            warning("Error deleting %s from %s: %s", to_string(), camera_name, result.to_full_string());
+        
+        return base.internal_delete_backing() && (result == GPhoto.Result.OK);
+    }
+    
+    public unowned string? get_indexable_keywords() {
+        return indexable_keywords;
+    }
+}
+
+class VideoImportSource : ImportSource {
+    public VideoImportSource(string camera_name, GPhoto.Camera camera, int fsid, string folder, 
+        string filename, ulong file_size, time_t modification_time) {
+        base(camera_name, camera, fsid, folder, filename, file_size, modification_time);
+    }
+    
+    public override Gdk.Pixbuf? get_thumbnail(int scale) throws Error {
+        return create_thumbnail(scale);
+    }
+    
+    public override Gdk.Pixbuf? create_thumbnail(int scale) throws Error {
+        if (get_preview() == null)
+            return null;
+        
+        // this satifies the return-a-new-instance requirement of create_thumbnail( ) because
+        // scale_pixbuf( ) allocates a new pixbuf
+        return (scale > 0) ? scale_pixbuf(get_preview(), scale, Gdk.InterpType.BILINEAR, true) :
+            get_preview();
+    }
+    
+    public override string get_typename() {
+        return "videoimport";
+    }
+    
+    public override int64 get_instance_id() {
+        return get_object_id();
+    }
+    
+    public override PhotoFileFormat get_preferred_thumbnail_format() {
+        return PhotoFileFormat.get_system_default_format();
+    }
+
+    public override string get_name() {
+        return get_filename();
+    }
+    
+    public void update(Gdk.Pixbuf? preview) {
+        set_preview((preview != null) ? preview : Resources.get_noninterpretable_badge_pixbuf());
+    }
+}
+
+class PhotoImportSource : ImportSource {
+    public const Gdk.InterpType INTERP = Gdk.InterpType.BILINEAR;
+
+    private PhotoFileFormat file_format;
+    private string? preview_md5 = null;
+    private PhotoMetadata? metadata = null;
+    private string? exif_md5 = null;
+    private PhotoImportSource? associated = null; // JPEG source for RAW+JPEG
+    
+    public PhotoImportSource(string camera_name, GPhoto.Camera camera, int fsid, string folder, 
+        string filename, ulong file_size, time_t modification_time, PhotoFileFormat file_format) {
+        base(camera_name, camera, fsid, folder, filename, file_size, modification_time);
+        this.file_format = file_format;
+    }
+    
+    public override string get_name() {
+        string? title = get_title();
+        
+        return !is_string_empty(title) ? title : get_filename();
+    }
+    
+    public override string get_typename() {
+        return "photoimport";
+    }
+    
+    public override int64 get_instance_id() {
+        return get_object_id();
+    }
+    
+    public override PhotoFileFormat get_preferred_thumbnail_format() {
+        return (file_format.can_write()) ? file_format :
+            PhotoFileFormat.get_system_default_format();
+    }
+
+    public override Gdk.Pixbuf? create_thumbnail(int scale) throws Error {
+        if (get_preview() == null)
+            return null;
+        
+        // this satifies the return-a-new-instance requirement of create_thumbnail( ) because
+        // scale_pixbuf( ) allocates a new pixbuf
+        return (scale > 0) ? scale_pixbuf(get_preview(), scale, INTERP, true) : get_preview();
+    }
+
+    // Needed because previews and exif are loaded after other information has been gathered.
+    public void update(Gdk.Pixbuf? preview, string? preview_md5, PhotoMetadata? metadata, string? exif_md5) {
+        set_preview(preview);
+        this.preview_md5 = preview_md5;
+        this.metadata = metadata;
+        this.exif_md5 = exif_md5;
+    }
+
+    public override time_t get_exposure_time() {
+        if (metadata == null)
+            return get_modification_time();
+        
+        MetadataDateTime? date_time = metadata.get_exposure_date_time();
+        
+        return (date_time != null) ? date_time.get_timestamp() : get_modification_time();
+    }
+    
+    public string? get_title() {
+        return (metadata != null) ? metadata.get_title() : null;
+    }
+    
+    public PhotoMetadata? get_metadata() {
+        if (associated != null)
+            return associated.get_metadata();
+        
+        return metadata;
+    }
+    
+    public override Gdk.Pixbuf? get_preview() {
+        if (associated != null)
+            return associated.get_preview();
+            
+        if (base.get_preview() != null) 
+            return base.get_preview();
+        
+        return null;
+    }
+    
+    public override Gdk.Pixbuf? get_thumbnail(int scale) throws Error {
+        if (get_preview() == null)
+            return null;
+        
+        return (scale > 0) ? scale_pixbuf(get_preview(), scale, INTERP, true) : get_preview();
+    }
+    
+    public PhotoFileFormat get_file_format() {
+        return file_format;
+    }
+    
+    public string? get_preview_md5() {
+        return preview_md5;
+    }
+    
+    public void set_associated(PhotoImportSource? associated) {
+        this.associated = associated;
+    }
+    
+    public PhotoImportSource? get_associated() {
+        return associated;
+    }
+    
+    public override bool internal_delete_backing() throws Error {
+        bool ret = base.internal_delete_backing();
+        if (associated != null)
+            ret &= associated.internal_delete_backing();
+        return ret;
+    }
+}
+
+class ImportPreview : MediaSourceItem {
+    public const int MAX_SCALE = 128;
+    
+    private static Gdk.Pixbuf placeholder_preview = null;
+    
+    private DuplicatedFile? duplicated_file;
+    
+    public ImportPreview(ImportSource source) {
+        base(source, Dimensions(), source.get_name(), null);
+        
+        this.duplicated_file = null;
+        
+        // draw sprocket holes as visual indications on video previews
+        if (source is VideoImportSource)
+            set_enable_sprockets(true);
+        
+        // scale down pixbuf if necessary
+        Gdk.Pixbuf pixbuf = null;
+        try {
+            pixbuf = source.get_thumbnail(0);
+        } catch (Error err) {
+            warning("Unable to fetch loaded import preview for %s: %s", to_string(), err.message);
+        }
+        
+        // use placeholder if no preview available
+        bool using_placeholder = (pixbuf == null);
+        if (pixbuf == null) {
+            if (placeholder_preview == null) {
+                placeholder_preview = AppWindow.get_instance().render_icon(Gtk.Stock.MISSING_IMAGE, 
+                    Gtk.IconSize.DIALOG, null);
+                placeholder_preview = scale_pixbuf(placeholder_preview, MAX_SCALE,
+                    Gdk.InterpType.BILINEAR, true);
+            }
+            
+            pixbuf = placeholder_preview;
+        }
+        
+        // scale down if too large
+        if (pixbuf.get_width() > MAX_SCALE || pixbuf.get_height() > MAX_SCALE)
+            pixbuf = scale_pixbuf(pixbuf, MAX_SCALE, PhotoImportSource.INTERP, false);
+        
+        if (source is PhotoImportSource) {
+            // honor rotation for photos -- we don't care about videos since they can't be rotated
+            PhotoImportSource photo_import_source = source as PhotoImportSource;
+            if (!using_placeholder && photo_import_source.get_metadata() != null)
+                pixbuf = photo_import_source.get_metadata().get_orientation().rotate_pixbuf(pixbuf);
+            
+            if (photo_import_source.get_associated() != null) {
+                set_subtitle("<small>%s</small>".printf(_("RAW+JPEG")), true);
+            }
+        }
+        
+        set_image(pixbuf);
+    }
+    
+    public bool is_already_imported() {
+        PhotoImportSource photo_import_source = get_import_source() as PhotoImportSource;
+        if (photo_import_source != null) {
+            string? preview_md5 = photo_import_source.get_preview_md5();
+            PhotoFileFormat file_format = photo_import_source.get_file_format();
+            
+            // ignore trashed duplicates
+            if (!is_string_empty(preview_md5)
+                && LibraryPhoto.has_nontrash_duplicate(null, preview_md5, null, file_format)) {
+                
+                duplicated_file = DuplicatedFile.create_from_photo_id(
+                    LibraryPhoto.get_nontrash_duplicate(null, preview_md5, null, file_format));
+                
+                return true;
+            }
+            
+            // Because gPhoto doesn't reliably return thumbnails for RAW files, and because we want
+            // to avoid downloading huge RAW files during an "import all" only to determine they're
+            // duplicates, use the image's basename and filesize to do duplicate detection
+            if (file_format == PhotoFileFormat.RAW) {
+                uint64 filesize = get_import_source().get_filesize();
+                // unlikely to be a problem, but what the hay
+                if (filesize <= int64.MAX) {
+                    if (LibraryPhoto.global.has_basename_filesize_duplicate(
+                        get_import_source().get_filename(), (int64) filesize)) {
+                        
+                        duplicated_file = DuplicatedFile.create_from_photo_id(
+                            LibraryPhoto.global.get_basename_filesize_duplicate(
+                            get_import_source().get_filename(), (int64) filesize));
+                        
+                        return true;
+                    }
+                }
+            }
+            
+            return false;
+        }
+        
+        VideoImportSource video_import_source = get_import_source() as VideoImportSource;
+        if (video_import_source != null) {
+            // Unlike photos, if a video does have a thumbnail (i.e. gphoto2 can retrieve one from
+            // a sidecar file), it will be unavailable to Shotwell during the import process, so
+            // no comparison is available.  Instead, like RAW files, use name and filesize to
+            // do a less-reliable but better-than-nothing comparison
+            if (Video.global.has_basename_filesize_duplicate(video_import_source.get_filename(),
+                video_import_source.get_filesize())) {
+                
+                duplicated_file = DuplicatedFile.create_from_video_id(
+                    Video.global.get_basename_filesize_duplicate(
+                    video_import_source.get_filename(),
+                    video_import_source.get_filesize()));
+                
+                return true;
+            }
+            
+            return false;
+        }
+        
+        return false;
+    }
+    
+    public DuplicatedFile? get_duplicated_file() {
+        if (!is_already_imported())
+            return null;
+        
+        return duplicated_file;
+    }
+    
+    public ImportSource get_import_source() {
+        return (ImportSource) get_source();
+    }
+}
+
+public class CameraViewTracker : Core.ViewTracker {
+    public CameraAccumulator all = new CameraAccumulator();
+    public CameraAccumulator visible = new CameraAccumulator();
+    public CameraAccumulator selected = new CameraAccumulator();
+    
+    public CameraViewTracker(ViewCollection collection) {
+        base (collection);
+        
+        start(all, visible, selected);
+    }
+}
+
+public class CameraAccumulator : Object, Core.TrackerAccumulator {
+    public int total { get; private set; default = 0; }
+    public int photos { get; private set; default = 0; }
+    public int videos { get; private set; default = 0; }
+    public int raw { get; private set; default = 0; }
+    
+    public bool include(DataObject object) {
+        ImportSource source = (ImportSource) ((DataView) object).get_source();
+        
+        total++;
+        
+        PhotoImportSource? photo = source as PhotoImportSource;
+        if (photo != null && photo.get_file_format() != PhotoFileFormat.RAW)
+            photos++;
+        else if (photo != null && photo.get_file_format() == PhotoFileFormat.RAW)
+            raw++;
+        else if (source is VideoImportSource)
+            videos++;
+        
+        // because of total, always fire "updated"
+        return true;
+    }
+    
+    public bool uninclude(DataObject object) {
+        ImportSource source = (ImportSource) ((DataView) object).get_source();
+        
+        total++;
+        
+        PhotoImportSource? photo = source as PhotoImportSource;
+        if (photo != null && photo.get_file_format() != PhotoFileFormat.RAW) {
+            assert(photos > 0);
+            photos--;
+        } else if (photo != null && photo.get_file_format() == PhotoFileFormat.RAW) {
+            assert(raw > 0);
+            raw--;
+        } else if (source is VideoImportSource) {
+            assert(videos > 0);
+            videos--;
+        }
+        
+        // because of total, always fire "updated"
+        return true;
+    }
+    
+    public bool altered(DataObject object, Alteration alteration) {
+        // no alteration affects accumulated data
+        return false;
+    }
+    
+    public string to_string() {
+        return "%d total/%d photos/%d videos/%d raw".printf(total, photos, videos, raw);
+    }
+}
+
+public class ImportPage : CheckerboardPage {
+    private const string UNMOUNT_FAILED_MSG = _("Unable to unmount camera.  Try unmounting the camera from the file manager.");
+    
+    private class ImportViewManager : ViewManager {
+        private ImportPage owner;
+        
+        public ImportViewManager(ImportPage owner) {
+            this.owner = owner;
+        }
+        
+        public override DataView create_view(DataSource source) {
+            return new ImportPreview((ImportSource) source);
+        }
+    }
+    
+    private class CameraImportJob : BatchImportJob {
+        private GPhoto.ContextWrapper context;
+        private ImportSource import_file;
+        private GPhoto.Camera camera;
+        private string fulldir;
+        private string filename;
+        private uint64 filesize;
+        private PhotoMetadata metadata;
+        private time_t exposure_time;
+        private CameraImportJob? associated = null;
+        private BackingPhotoRow? associated_file = null;
+        private DuplicatedFile? duplicated_file;
+        
+        public CameraImportJob(GPhoto.ContextWrapper context, ImportSource import_file,
+            DuplicatedFile? duplicated_file = null) {
+            this.context = context;
+            this.import_file = import_file;
+            this.duplicated_file = duplicated_file;
+            
+            // stash everything called in prepare(), as it may/will be called from a separate thread
+            camera = import_file.get_camera();
+            fulldir = import_file.get_fulldir();
+            // this should've been caught long ago when the files were first enumerated
+            assert(fulldir != null);
+            filename = import_file.get_filename();
+            filesize = import_file.get_filesize();
+            metadata = (import_file is PhotoImportSource) ?
+                (import_file as PhotoImportSource).get_metadata() : null;
+            exposure_time = import_file.get_exposure_time();
+        }
+        
+        public time_t get_exposure_time() {
+            return exposure_time;
+        }
+        
+        public override DuplicatedFile? get_duplicated_file() {
+            return duplicated_file;
+        }
+
+        public override time_t get_exposure_time_override() {
+            return (import_file is VideoImportSource) ? get_exposure_time() : 0;
+        }
+        
+        public override string get_dest_identifier() {
+            return filename;
+        }
+        
+        public override string get_source_identifier() {
+            return import_file.get_filename();
+        }
+        
+        public override string get_basename() {
+            return filename;
+        }
+    
+        public override string get_path() {
+            return fulldir;
+        }
+        
+        public override void set_associated(BatchImportJob associated) {
+            this.associated = associated as CameraImportJob;
+        }
+        
+        public ImportSource get_source() {
+            return import_file;
+        }
+        
+        public override bool is_directory() {
+            return false;
+        }
+        
+        public override bool determine_file_size(out uint64 filesize, out File file) {
+            file = null;
+            filesize = this.filesize;
+            
+            return true;
+        }
+        
+        public override bool prepare(out File file_to_import, out bool copy_to_library) throws Error {
+            file_to_import = null;
+            copy_to_library = false;
+            
+            File dest_file = null;
+            try {
+                bool collision;
+                dest_file = LibraryFiles.generate_unique_file(filename, metadata, exposure_time,
+                    out collision);
+            } catch (Error err) {
+                warning("Unable to generate local file for %s: %s", import_file.get_filename(),
+                    err.message);
+            }
+            
+            if (dest_file == null) {
+                message("Unable to generate local file for %s", import_file.get_filename());
+                
+                return false;
+            }
+            
+            // always blacklist the copied images from the LibraryMonitor, otherwise it'll think
+            // they should be auto-imported
+            LibraryMonitor.blacklist_file(dest_file, "CameraImportJob.prepare");
+            try {
+                GPhoto.save_image(context.context, camera, fulldir, filename, dest_file);
+            } finally {
+                LibraryMonitor.unblacklist_file(dest_file);
+            }
+            
+            // Copy over associated file, if it exists.
+            if (associated != null) {
+                try {
+                    associated_file = 
+                        RawDeveloper.CAMERA.create_backing_row_for_development(dest_file.get_path(),
+                            associated.get_basename());
+                } catch (Error err) {
+                    warning("Unable to generate backing associated file for %s: %s", associated.filename,
+                        err.message);
+                }
+                
+                if (associated_file == null) {
+                    message("Unable to generate backing associated file for %s", associated.filename);
+                    return false;
+                }
+                
+                File assoc_dest = File.new_for_path(associated_file.filepath);
+                LibraryMonitor.blacklist_file(assoc_dest, "CameraImportJob.prepare");
+                try {
+                    GPhoto.save_image(context.context, camera, associated.fulldir, associated.filename, 
+                        assoc_dest);
+                } finally {
+                    LibraryMonitor.unblacklist_file(assoc_dest);
+                }
+            }
+            
+            file_to_import = dest_file;
+            copy_to_library = false;
+            
+            return true;
+        }
+        
+        public override bool complete(MediaSource source, BatchImportRoll import_roll) throws Error {
+            bool ret = false;
+            if (source is Photo) {
+                Photo photo = source as Photo;
+                
+                // Associate paired JPEG with RAW photo.
+                if (associated_file != null) {
+                    photo.add_backing_photo_for_development(RawDeveloper.CAMERA, associated_file);
+                    ret = true;
+                    photo.set_raw_developer(Config.Facade.get_instance().get_default_raw_developer());
+                }
+            }
+            return ret;
+        }
+    }
+    
+    private class ImportPageSearchViewFilter : SearchViewFilter {
+        public override uint get_criteria() {
+            return SearchFilterCriteria.TEXT | SearchFilterCriteria.MEDIA;
+        }
+        
+        public override bool predicate(DataView view) {
+            ImportSource source = ((ImportPreview) view).get_import_source();
+            
+            // Media type.
+            if ((bool) (SearchFilterCriteria.MEDIA & get_criteria()) && filter_by_media_type()) {
+                if (source is VideoImportSource) {
+                    if (!show_media_video)
+                        return false;
+                } else if (source is PhotoImportSource) {
+                    PhotoImportSource photo = source as PhotoImportSource;
+                    if (photo.get_file_format() == PhotoFileFormat.RAW) {
+                        if (photo.get_associated() != null) {
+                            if (!show_media_photos && !show_media_raw)
+                                return false;
+                        } else if (!show_media_raw) {
+                            return false;
+                        }
+                    } else if (!show_media_photos)
+                        return false;
+                }
+            }
+            
+            if ((bool) (SearchFilterCriteria.TEXT & get_criteria())) {
+                unowned string? keywords = source.get_indexable_keywords();
+                if (is_string_empty(keywords))
+                    return false;
+                
+                // Return false if the word isn't found, true otherwise.
+                foreach (unowned string word in get_search_filter_words()) {
+                    if (!keywords.contains(word))
+                        return false;
+                }
+            }
+            
+            return true;
+        }
+    }
+    
+    // View filter for already imported filter.
+    private class HideImportedViewFilter : ViewFilter {
+        public override bool predicate(DataView view) {
+            return !((ImportPreview) view).is_already_imported();
+        }
+    }
+    
+    public static GPhoto.ContextWrapper null_context = null;
+    public static GPhoto.SpinIdleWrapper spin_idle_context = null;
+
+    private SourceCollection import_sources = null;
+    private Gtk.Label camera_label = new Gtk.Label(null);
+    private Gtk.CheckButton hide_imported;
+    private Gtk.ProgressBar progress_bar = new Gtk.ProgressBar();
+    private GPhoto.Camera camera;
+    private string uri;
+    private bool busy = false;
+    private bool refreshed = false;
+    private GPhoto.Result refresh_result = GPhoto.Result.OK;
+    private string refresh_error = null;
+    private string camera_name;
+    private VolumeMonitor volume_monitor = null;
+    private ImportPage? local_ref = null;
+    private GLib.Icon? icon;
+    private ImportPageSearchViewFilter search_filter = new ImportPageSearchViewFilter();
+    private HideImportedViewFilter hide_imported_filter = new HideImportedViewFilter();
+    private CameraViewTracker tracker;
+
+#if UNITY_SUPPORT
+    UnityProgressBar uniprobar = UnityProgressBar.get_instance();
+#endif
+    
+    public enum RefreshResult {
+        OK,
+        BUSY,
+        LOCKED,
+        LIBRARY_ERROR
+    }
+    
+    public ImportPage(GPhoto.Camera camera, string uri, string? display_name = null, GLib.Icon? icon = null) {
+        base(_("Camera"));
+        this.camera = camera;
+        this.uri = uri;
+        this.import_sources = new ImportSourceCollection("ImportSources for %s".printf(uri));
+        this.icon = icon;
+        
+        tracker = new CameraViewTracker(get_view());
+        
+        // Get camera name.
+        if (null != display_name) {
+            camera_name = display_name;
+        } else {
+            GPhoto.CameraAbilities abilities;
+            GPhoto.Result res = camera.get_abilities(out abilities);
+            if (res != GPhoto.Result.OK) {
+                debug("Unable to get camera abilities: %s", res.to_full_string());
+                camera_name = _("Camera");
+            }
+        }
+        camera_label.set_text(camera_name);
+        set_page_name(camera_name);
+        
+        // Mount.unmounted signal is *only* fired when a VolumeMonitor has been instantiated.
+        this.volume_monitor = VolumeMonitor.get();
+        
+        // set up the global null context when needed
+        if (null_context == null)
+            null_context = new GPhoto.ContextWrapper();
+        
+        // same with idle-loop wrapper
+        if (spin_idle_context == null)
+            spin_idle_context = new GPhoto.SpinIdleWrapper();
+        
+        // monitor source collection to add/remove views
+        get_view().monitor_source_collection(import_sources, new ImportViewManager(this), null);
+        
+        // sort by exposure time
+        get_view().set_comparator(preview_comparator, preview_comparator_predicate);
+        
+        // monitor selection for UI
+        get_view().items_state_changed.connect(on_view_changed);
+        get_view().contents_altered.connect(on_view_changed);
+        get_view().items_visibility_changed.connect(on_view_changed);
+        
+        // Show subtitles.
+        get_view().set_property(CheckerboardItem.PROP_SHOW_SUBTITLES, true);
+        
+        // monitor Photos for removals, as that will change the result of the ViewFilter
+        LibraryPhoto.global.contents_altered.connect(on_media_added_removed);
+        Video.global.contents_altered.connect(on_media_added_removed);
+        
+        init_item_context_menu("/ImportContextMenu");
+        init_page_context_menu("/ImportContextMenu");
+    }
+    
+    ~ImportPage() {
+        LibraryPhoto.global.contents_altered.disconnect(on_media_added_removed);
+        Video.global.contents_altered.disconnect(on_media_added_removed);
+    }
+    
+    public override Gtk.Toolbar get_toolbar() {
+        if (toolbar == null) {
+            base.get_toolbar();
+
+            // hide duplicates checkbox
+            hide_imported = new Gtk.CheckButton.with_label(_("Hide photos already imported"));
+            hide_imported.set_tooltip_text(_("Only display photos that have not been imported"));
+            hide_imported.clicked.connect(on_hide_imported);
+            hide_imported.sensitive = false;
+            hide_imported.active = Config.Facade.get_instance().get_hide_photos_already_imported();
+            Gtk.ToolItem hide_item = new Gtk.ToolItem();
+            hide_item.is_important = true;
+            hide_item.add(hide_imported);
+            
+            toolbar.insert(hide_item, -1);
+            
+            // separator to force buttons to right side of toolbar
+            Gtk.SeparatorToolItem separator = new Gtk.SeparatorToolItem();
+            separator.set_draw(false);
+            
+            toolbar.insert(separator, -1);
+            
+            // progress bar in center of toolbar
+            progress_bar.set_orientation(Gtk.Orientation.HORIZONTAL);
+            progress_bar.visible = false;
+            Gtk.ToolItem progress_item = new Gtk.ToolItem();
+            progress_item.set_expand(true);
+            progress_item.add(progress_bar);
+            progress_bar.set_show_text(true);
+            
+            toolbar.insert(progress_item, -1);
+            
+            // Find button
+            Gtk.ToggleToolButton find_button = new Gtk.ToggleToolButton();
+            find_button.set_related_action(get_action("CommonDisplaySearchbar"));
+            
+            toolbar.insert(find_button, -1);
+            
+            // Separator
+            toolbar.insert(new Gtk.SeparatorToolItem(), -1);
+            
+            // Import selected
+            Gtk.ToolButton import_selected_button = new Gtk.ToolButton.from_stock(Resources.IMPORT);
+            import_selected_button.set_related_action(get_action("ImportSelected"));
+            
+            toolbar.insert(import_selected_button, -1);
+            
+            // Import all
+            Gtk.ToolButton import_all_button = new Gtk.ToolButton.from_stock(Resources.IMPORT_ALL);
+            import_all_button.set_related_action(get_action("ImportAll"));
+            
+            toolbar.insert(import_all_button, -1);
+
+            // restrain the recalcitrant rascal!  prevents the progress bar from being added to the
+            // show_all queue so we have more control over its visibility
+            progress_bar.set_no_show_all(true);
+            
+            update_toolbar_state();
+            
+            show_all();
+        }
+        
+        return toolbar;
+    }
+    
+    public override Core.ViewTracker? get_view_tracker() {
+        return tracker;
+    }
+    
+    // Ticket #3304 - Import page shouldn't display confusing message
+    // prior to import. 
+    // TODO: replace this with approved text for "talking to camera, 
+    // please wait" once new strings are being accepted.
+    protected override string get_view_empty_message() {
+        return _("Starting import, please wait...");
+    }
+
+    private static int64 preview_comparator(void *a, void *b) {
+        return ((ImportPreview *) a)->get_import_source().get_exposure_time()
+            - ((ImportPreview *) b)->get_import_source().get_exposure_time();
+    }
+    
+    private static bool preview_comparator_predicate(DataObject object, Alteration alteration) {
+        return alteration.has_detail("metadata", "exposure-time");
+    }
+    
+    private int64 import_job_comparator(void *a, void *b) {
+        return ((CameraImportJob *) a)->get_exposure_time() - ((CameraImportJob *) b)->get_exposure_time();
+    }
+    
+    protected override void init_collect_ui_filenames(Gee.List<string> ui_filenames) {
+        base.init_collect_ui_filenames(ui_filenames);
+        
+        ui_filenames.add("import.ui");
+    }
+    
+    protected override Gtk.ToggleActionEntry[] init_collect_toggle_action_entries() {
+        Gtk.ToggleActionEntry[] toggle_actions = base.init_collect_toggle_action_entries();
+
+        Gtk.ToggleActionEntry titles = { "ViewTitle", null, TRANSLATABLE, "<Ctrl><Shift>T",
+            TRANSLATABLE, on_display_titles, Config.Facade.get_instance().get_display_photo_titles() };
+        titles.label = _("_Titles");
+        titles.tooltip = _("Display the title of each photo");
+        toggle_actions += titles;
+
+        return toggle_actions;
+    }
+
+    protected override Gtk.ActionEntry[] init_collect_action_entries() {
+        Gtk.ActionEntry[] actions = base.init_collect_action_entries();
+        
+        Gtk.ActionEntry import_selected = { "ImportSelected", Resources.IMPORT,
+            TRANSLATABLE, null, null, on_import_selected };
+        import_selected.label = _("Import _Selected");
+        import_selected.tooltip = _("Import the selected photos into your library");
+        actions += import_selected;
+
+        Gtk.ActionEntry import_all = { "ImportAll", Resources.IMPORT_ALL, TRANSLATABLE,
+            null, null, on_import_all };
+        import_all.label = _("Import _All");
+        import_all.tooltip = _("Import all the photos into your library");
+        actions += import_all;
+
+        return actions;
+    }
+    
+    public GPhoto.Camera get_camera() {
+        return camera;
+    }
+    
+    public string get_uri() {
+        return uri;
+    }
+    
+    public bool is_busy() {
+        return busy;
+    }
+    
+    protected override void init_actions(int selected_count, int count) {
+        on_view_changed();
+        
+        set_action_important("ImportSelected", true);
+        set_action_important("ImportAll", true);
+        
+        base.init_actions(selected_count, count);
+    }
+    
+    public bool is_refreshed() {
+        return refreshed && !busy;
+    }
+    
+    public string? get_refresh_message() {
+        string msg = null;
+        if (refresh_error != null) {
+            msg = refresh_error;
+        } else if (refresh_result == GPhoto.Result.OK) {
+            // all went well
+        } else {
+            msg = refresh_result.to_full_string();
+        }
+        
+        return msg;
+    }
+    
+    private void update_status(bool busy, bool refreshed) {
+        this.busy = busy;
+        this.refreshed = refreshed;
+        
+        on_view_changed();
+    }
+
+    private void update_toolbar_state() {
+        if (hide_imported != null)
+            hide_imported.sensitive = !busy && refreshed && (get_view().get_unfiltered_count() > 0);
+    }
+    
+    private void on_view_changed() {
+        set_action_sensitive("ImportSelected", !busy && refreshed && get_view().get_selected_count() > 0);
+        set_action_sensitive("ImportAll", !busy && refreshed && get_view().get_count() > 0);
+        AppWindow.get_instance().set_common_action_sensitive("CommonSelectAll",
+            !busy && (get_view().get_count() > 0));
+
+        update_toolbar_state();
+    }
+    
+    private void on_media_added_removed() {
+        search_filter.refresh();
+    }
+
+    private void on_display_titles(Gtk.Action action) {
+        bool display = ((Gtk.ToggleAction) action).get_active();
+
+        set_display_titles(display);
+        Config.Facade.get_instance().set_display_photo_titles(display);
+    }
+    
+    public override void switched_to() {
+        set_display_titles(Config.Facade.get_instance().get_display_photo_titles());
+        
+        base.switched_to();
+    }
+
+    public override void ready() {
+        try_refreshing_camera(false);
+        hide_imported_filter.refresh();
+    }
+
+    private void try_refreshing_camera(bool fail_on_locked) {
+        // if camera has been refreshed or is in the process of refreshing, go no further
+        if (refreshed || busy)
+            return;
+        
+        RefreshResult res = refresh_camera();
+        switch (res) {
+            case ImportPage.RefreshResult.OK:
+            case ImportPage.RefreshResult.BUSY:
+                // nothing to report; if busy, let it continue doing its thing
+                // (although earlier check should've caught this)
+            break;
+            
+            case ImportPage.RefreshResult.LOCKED:
+                if (fail_on_locked) {
+                    AppWindow.error_message(UNMOUNT_FAILED_MSG);
+                    
+                    break;
+                }
+                
+                // if locked because it's mounted, offer to unmount
+                debug("Checking if %s is mounted ...", uri);
+
+                File uri = File.new_for_uri(uri);
+
+                Mount mount = null;
+                try {
+                    mount = uri.find_enclosing_mount(null);
+                } catch (Error err) {
+                    // error means not mounted
+                }
+                
+                if (mount != null) {
+                    // it's mounted, offer to unmount for the user
+                    string mounted_message = _("Shotwell needs to unmount the camera from the filesystem in order to access it.  Continue?");
+
+                    Gtk.MessageDialog dialog = new Gtk.MessageDialog(AppWindow.get_instance(), 
+                        Gtk.DialogFlags.MODAL, Gtk.MessageType.QUESTION,
+                        Gtk.ButtonsType.CANCEL, "%s", mounted_message);
+                    dialog.title = Resources.APP_TITLE;
+                    dialog.add_button(_("_Unmount"), Gtk.ResponseType.YES);
+                    int dialog_res = dialog.run();
+                    dialog.destroy();
+                    
+                    if (dialog_res != Gtk.ResponseType.YES) {
+                        set_page_message(_("Please unmount the camera."));
+                    } else {
+                        unmount_camera(mount);
+                    }
+                } else {
+                    string locked_message = _("The camera is locked by another application.  Shotwell can only access the camera when it's unlocked.  Please close any other application using the camera and try again.");
+
+                    // it's not mounted, so another application must have it locked
+                    Gtk.MessageDialog dialog = new Gtk.MessageDialog(AppWindow.get_instance(),
+                        Gtk.DialogFlags.MODAL, Gtk.MessageType.WARNING,
+                        Gtk.ButtonsType.OK, "%s", locked_message);
+                    dialog.title = Resources.APP_TITLE;
+                    dialog.run();
+                    dialog.destroy();
+                    
+                    set_page_message(_("Please close any other application using the camera."));
+                }
+            break;
+            
+            case ImportPage.RefreshResult.LIBRARY_ERROR:
+                AppWindow.error_message(_("Unable to fetch previews from the camera:\n%s").printf(
+                    get_refresh_message()));
+            break;
+            
+            default:
+                error("Unknown result type %d", (int) res);
+        }
+    }
+    
+    public bool unmount_camera(Mount mount) {
+        if (busy)
+            return false;
+        
+        update_status(true, false);
+        progress_bar.visible = true;
+        progress_bar.set_fraction(0.0);
+        progress_bar.set_ellipsize(Pango.EllipsizeMode.NONE);
+        progress_bar.set_text(_("Unmounting..."));
+        
+        // unmount_with_operation() can/will complete with the volume still mounted (probably meaning
+        // it's been *scheduled* for unmounting).  However, this signal is fired when the mount
+        // really is unmounted -- *if* a VolumeMonitor has been instantiated.
+        mount.unmounted.connect(on_unmounted);
+        
+        debug("Unmounting camera ...");
+        mount.unmount_with_operation.begin(MountUnmountFlags.NONE, 
+            new Gtk.MountOperation(AppWindow.get_instance()), null, on_unmount_finished);
+        
+        return true;
+    }
+    
+    private void on_unmount_finished(Object? source, AsyncResult aresult) {
+        debug("Async unmount finished");
+        
+        Mount mount = (Mount) source;
+        try {
+            mount.unmount_with_operation.end(aresult);
+        } catch (Error err) {
+            AppWindow.error_message(UNMOUNT_FAILED_MSG);
+            
+            // don't trap this signal, even if it does come in, we've backed off
+            mount.unmounted.disconnect(on_unmounted);
+            
+            update_status(false, refreshed);
+            progress_bar.set_ellipsize(Pango.EllipsizeMode.NONE);
+            progress_bar.set_text("");
+            progress_bar.visible = false;
+        }
+    }
+    
+    private void on_unmounted(Mount mount) {
+        debug("on_unmounted");
+        
+        update_status(false, refreshed);
+        progress_bar.set_ellipsize(Pango.EllipsizeMode.NONE);
+        progress_bar.set_text("");
+        progress_bar.visible = false;
+        
+        try_refreshing_camera(true);
+    }
+    
+    private void clear_all_import_sources() {
+        Marker marker = import_sources.start_marking();
+        marker.mark_all();
+        import_sources.destroy_marked(marker, false);
+    }
+
+    /**
+     * @brief Returns whether the current device has a given directory or not.
+     *
+     * @param fsid The file system id of the camera or other device to search.
+     * @param dir The path to start searching from.
+     * @param search_target The name of the directory to look for.
+     */
+    private bool check_directory_exists(int fsid, string dir, string search_target) {
+        string? fulldir = get_fulldir(camera, camera_name, fsid, dir);
+        GPhoto.Result result;
+        GPhoto.CameraList folders;
+
+        result = GPhoto.CameraList.create(out folders);
+        if (result != GPhoto.Result.OK) {
+            // couldn't create a list - can't determine whether specified dir is present
+            return false;
+        }
+
+        result = camera.list_folders(fulldir, folders, spin_idle_context.context);
+        if (result != GPhoto.Result.OK) {
+            // fetching the list failed - can't determine whether specified dir is present
+            return false;
+        }
+
+        int list_len = folders.count();
+
+        for(int list_index = 0; list_index < list_len; list_index++) {
+            string tmp;
+
+            folders.get_name(list_index, out tmp);
+            if (tmp == search_target) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private RefreshResult refresh_camera() {
+        if (busy)
+            return RefreshResult.BUSY;
+            
+        update_status(busy, false);
+        
+        refresh_error = null;
+        refresh_result = camera.init(spin_idle_context.context);
+        if (refresh_result != GPhoto.Result.OK) {
+            warning("Unable to initialize camera: %s", refresh_result.to_full_string());
+            
+            return (refresh_result == GPhoto.Result.IO_LOCK) ? RefreshResult.LOCKED : RefreshResult.LIBRARY_ERROR;
+        }
+
+        update_status(true, refreshed);
+        
+        on_view_changed();
+
+        progress_bar.set_ellipsize(Pango.EllipsizeMode.NONE);
+        progress_bar.set_text(_("Fetching photo information"));
+        progress_bar.set_fraction(0.0);
+        progress_bar.set_pulse_step(0.01);
+        progress_bar.visible = true;
+        
+        Gee.ArrayList<ImportSource> import_list = new Gee.ArrayList<ImportSource>();
+        
+        GPhoto.CameraStorageInformation *sifs = null;
+        int count = 0;
+        refresh_result = camera.get_storageinfo(&sifs, out count, spin_idle_context.context);
+        if (refresh_result == GPhoto.Result.OK) {
+            for (int fsid = 0; fsid < count; fsid++) {
+                // Check well-known video and image paths first to prevent accidental
+                // scanning of undesired directories (which can cause user annoyance with
+                // some smartphones or camera-equipped media players)
+                bool got_well_known_dir = false;
+
+                // Check common paths for most primarily-still cameras, many (most?) smartphones
+                if (check_directory_exists(fsid, "/", "DCIM")) {
+                    enumerate_files(fsid, "/DCIM", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/", "dcim")) {
+                    enumerate_files(fsid, "/dcim", import_list);
+                    got_well_known_dir = true;
+                }
+
+                // Check common paths for AVCHD camcorders, primarily-still
+                // cameras that shoot .mts video files
+                if (check_directory_exists(fsid, "/PRIVATE/", "AVCHD")) {
+                    enumerate_files(fsid, "/PRIVATE/AVCHD", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/private/", "avchd")) {
+                    enumerate_files(fsid, "/private/avchd", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/", "AVCHD")) {
+                    enumerate_files(fsid, "/AVCHD", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/", "avchd")) {
+                    enumerate_files(fsid, "/avchd", import_list);
+                    got_well_known_dir = true;
+                }
+
+                // Check common video paths for some Sony primarily-still
+                // cameras
+                if (check_directory_exists(fsid, "/PRIVATE/", "SONY")) {
+                    enumerate_files(fsid, "/PRIVATE/SONY", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/private/", "sony")) {
+                    enumerate_files(fsid, "/private/sony", import_list);
+                    got_well_known_dir = true;
+                }
+
+                // Check common video paths for Sony NEX3, PSP addon camera 
+                if (check_directory_exists(fsid, "/", "MP_ROOT")) {
+                    enumerate_files(fsid, "/MP_ROOT", import_list);
+                    got_well_known_dir = true;
+                }
+                if (check_directory_exists(fsid, "/", "mp_root")) {
+                    enumerate_files(fsid, "/mp_root", import_list);
+                    got_well_known_dir = true;
+                }
+                
+                // Didn't find any of the common directories we know about
+                // already - try scanning from device root.
+                if (!got_well_known_dir) {
+                    if (!enumerate_files(fsid, "/", import_list))
+                        break;
+                }
+            }
+        }
+
+        clear_all_import_sources();
+
+        // Associate files (for RAW+JPEG)
+        auto_match_raw_jpeg(import_list);
+        
+#if UNITY_SUPPORT
+        //UnityProgressBar: try to draw progress bar
+        uniprobar.set_visible(true);
+#endif
+        
+        load_previews_and_metadata(import_list);
+        
+#if UNITY_SUPPORT
+        //UnityProgressBar: reset
+        uniprobar.reset();
+#endif
+        
+        progress_bar.visible = false;
+        progress_bar.set_ellipsize(Pango.EllipsizeMode.NONE);
+        progress_bar.set_text("");
+        progress_bar.set_fraction(0.0);
+        
+        GPhoto.Result res = camera.exit(spin_idle_context.context);
+        if (res != GPhoto.Result.OK) {
+            // log but don't fail
+            warning("Unable to unlock camera: %s", res.to_full_string());
+        }
+        
+        if (refresh_result == GPhoto.Result.OK) {
+            update_status(false, true);
+        } else {
+            update_status(false, false);
+            
+            // show 'em all or show none
+            clear_all_import_sources();
+        }
+        
+        on_view_changed();
+
+        switch (refresh_result) {
+            case GPhoto.Result.OK:
+                return RefreshResult.OK;
+            
+            case GPhoto.Result.IO_LOCK:
+                return RefreshResult.LOCKED;
+            
+            default:
+                return RefreshResult.LIBRARY_ERROR;
+        }
+    }
+    
+    private static string chomp_ch(string str, char ch) {
+        long offset = str.length;
+        while (--offset >= 0) {
+            if (str[offset] != ch)
+                return str.slice(0, offset);
+        }
+        
+        return "";
+    }
+    
+    public static string append_path(string basepath, string addition) {
+        if (!basepath.has_suffix("/") && !addition.has_prefix("/"))
+            return basepath + "/" + addition;
+        else if (basepath.has_suffix("/") && addition.has_prefix("/"))
+            return chomp_ch(basepath, '/') + addition;
+        else
+            return basepath + addition;
+    }
+    
+    // Need to do this because some phones (iPhone, in particular) changes the name of their filesystem
+    // between each mount
+    public static string? get_fs_basedir(GPhoto.Camera camera, int fsid) {
+        GPhoto.CameraStorageInformation *sifs = null;
+        int count = 0;
+        GPhoto.Result res = camera.get_storageinfo(&sifs, out count, null_context.context);
+        if (res != GPhoto.Result.OK)
+            return null;
+        
+        if (fsid >= count)
+            return null;
+        
+        GPhoto.CameraStorageInformation *ifs = sifs + fsid;
+        
+        return (ifs->fields & GPhoto.CameraStorageInfoFields.BASE) != 0 ? ifs->basedir : "/";
+    }
+    
+    public static string? get_fulldir(GPhoto.Camera camera, string camera_name, int fsid, string folder) {
+        if (folder.length > GPhoto.MAX_BASEDIR_LENGTH)
+            return null;
+        
+        string basedir = get_fs_basedir(camera, fsid);
+        if (basedir == null) {
+            debug("Unable to find base directory for %s fsid %d", camera_name, fsid);
+            
+            return folder;
+        }
+        
+        return append_path(basedir, folder);
+    }
+
+    private bool enumerate_files(int fsid, string dir, Gee.ArrayList<ImportSource> import_list) {
+        string? fulldir = get_fulldir(camera, camera_name, fsid, dir);
+        if (fulldir == null) {
+            warning("Skipping enumerating %s: invalid folder name", dir);
+            
+            return true;
+        }
+        
+        GPhoto.CameraList files;
+        refresh_result = GPhoto.CameraList.create(out files);
+        if (refresh_result != GPhoto.Result.OK) {
+            warning("Unable to create file list: %s", refresh_result.to_full_string());
+            
+            return false;
+        }
+        
+        refresh_result = camera.list_files(fulldir, files, spin_idle_context.context);
+        if (refresh_result != GPhoto.Result.OK) {
+            warning("Unable to list files in %s: %s", fulldir, refresh_result.to_full_string());
+            
+            // Although an error, don't abort the import because of this
+            refresh_result = GPhoto.Result.OK;
+            
+            return true;
+        }
+
+        for (int ctr = 0; ctr < files.count(); ctr++) {
+            string filename;
+            refresh_result = files.get_name(ctr, out filename);
+            if (refresh_result != GPhoto.Result.OK) {
+                warning("Unable to get the name of file %d in %s: %s", ctr, fulldir,
+                    refresh_result.to_full_string());
+                
+                return false;
+            }
+            
+            try {
+                GPhoto.CameraFileInfo info;
+                if (!GPhoto.get_info(spin_idle_context.context, camera, fulldir, filename, out info)) {
+                    warning("Skipping import of %s/%s: name too long", fulldir, filename);
+                    
+                    continue;
+                }
+                
+                if ((info.file.fields & GPhoto.CameraFileInfoFields.TYPE) == 0) {
+                    message("Skipping %s/%s: No file (file=%02Xh)", fulldir, filename,
+                        info.file.fields);
+                        
+                    continue;
+                }
+                
+                if (VideoReader.is_supported_video_filename(filename)) {
+                    VideoImportSource video_source = new VideoImportSource(camera_name, camera,
+                        fsid, dir, filename, info.file.size, info.file.mtime);
+                    import_list.add(video_source);
+                } else {
+                    // determine file format from type, and then from file extension
+                    PhotoFileFormat file_format = PhotoFileFormat.from_gphoto_type(info.file.type);               
+                    if (file_format == PhotoFileFormat.UNKNOWN) {
+                        file_format = PhotoFileFormat.get_by_basename_extension(filename);
+                        if (file_format == PhotoFileFormat.UNKNOWN) {
+                            message("Skipping %s/%s: Not a supported file extension (%s)", fulldir,
+                                filename, info.file.type);
+                            
+                            continue;
+                        }
+                    }
+                    import_list.add(new PhotoImportSource(camera_name, camera, fsid, dir, filename,
+                        info.file.size, info.file.mtime, file_format));
+                }
+                
+                progress_bar.pulse();
+                
+                // spin the event loop so the UI doesn't freeze
+                spin_event_loop();
+            } catch (Error err) {
+                warning("Error while enumerating files in %s: %s", fulldir, err.message);
+                
+                refresh_error = err.message;
+                
+                return false;
+            }
+        }
+        
+        GPhoto.CameraList folders;
+        refresh_result = GPhoto.CameraList.create(out folders);
+        if (refresh_result != GPhoto.Result.OK) {
+            warning("Unable to create folder list: %s", refresh_result.to_full_string());
+            
+            return false;
+        }
+        
+        refresh_result = camera.list_folders(fulldir, folders, spin_idle_context.context);
+        if (refresh_result != GPhoto.Result.OK) {
+            warning("Unable to list folders in %s: %s", fulldir, refresh_result.to_full_string());
+            
+            // Although an error, don't abort the import because of this
+            refresh_result = GPhoto.Result.OK;
+            
+            return true;
+        }
+        
+        for (int ctr = 0; ctr < folders.count(); ctr++) {
+            string subdir;
+            refresh_result = folders.get_name(ctr, out subdir);
+            if (refresh_result != GPhoto.Result.OK) {
+                warning("Unable to get name of folder %d: %s", ctr, refresh_result.to_full_string());
+                
+                return false;
+            }
+            
+            if (!enumerate_files(fsid, append_path(dir, subdir), import_list))
+                return false;
+        }
+        
+        return true;
+    }
+    
+    // Try to match RAW+JPEG pairs.
+    private void auto_match_raw_jpeg(Gee.ArrayList<ImportSource> import_list) {
+        for (int i = 0; i < import_list.size; i++) {
+            PhotoImportSource? current = import_list.get(i) as PhotoImportSource;
+            PhotoImportSource? next = (i + 1 < import_list.size) ? 
+                import_list.get(i + 1) as PhotoImportSource : null;
+            PhotoImportSource? prev = (i > 0) ? 
+                import_list.get(i - 1) as PhotoImportSource : null;
+            if (current != null && current.get_file_format() == PhotoFileFormat.RAW) {
+                string current_name;
+                string ext;
+                disassemble_filename(current.get_filename(), out current_name, out ext);
+                
+                // Try to find a matching pair.
+                PhotoImportSource? associated = null;
+                if (next != null && next.get_file_format() == PhotoFileFormat.JFIF) {
+                    string next_name;
+                    disassemble_filename(next.get_filename(), out next_name, out ext);
+                    if (next_name == current_name)
+                        associated = next;
+                }
+                if (prev != null && prev.get_file_format() == PhotoFileFormat.JFIF) {
+                    string prev_name;
+                    disassemble_filename(prev.get_filename(), out prev_name, out ext);
+                    if (prev_name == current_name)
+                        associated = prev;
+                }
+                
+                // Associate!
+                if (associated != null) {
+                    debug("Found RAW+JPEG pair: %s and %s", current.get_filename(), associated.get_filename());
+                    current.set_associated(associated);
+                    if (!import_list.remove(associated)) {
+                        debug("Unable to associate files");
+                        current.set_associated(null);
+                    }
+                }
+            }
+        }
+    }
+    
+    private void load_previews_and_metadata(Gee.List<ImportSource> import_list) {
+        int loaded_photos = 0;
+        foreach (ImportSource import_source in import_list) {
+            string filename = import_source.get_filename();
+            string? fulldir = import_source.get_fulldir();
+            if (fulldir == null) {
+                warning("Skipping loading preview of %s: invalid folder name", import_source.to_string());
+                
+                continue;
+            }
+            
+            // Get JPEG pair, if available.
+            PhotoImportSource? associated = null;
+            if (import_source is PhotoImportSource && 
+                ((PhotoImportSource) import_source).get_associated() != null) {
+                associated = ((PhotoImportSource) import_source).get_associated();
+            }
+            
+            progress_bar.set_ellipsize(Pango.EllipsizeMode.MIDDLE);
+            progress_bar.set_text(_("Fetching preview for %s").printf(import_source.get_name()));
+            
+            // Ask GPhoto to read the current file's metadata, but only if the file is not a
+            // video. Across every memory card and camera type I've tested (lucas, as of 10/27/2010)
+            // GPhoto always loads null metadata for videos. So without the is-not-video guard,
+            // this code segment just needlessly and annoyingly prints a warning message to the
+            // console.
+            PhotoMetadata? metadata = null;
+            if (!VideoReader.is_supported_video_filename(filename)) {
+                try {
+                    metadata = GPhoto.load_metadata(spin_idle_context.context, camera, fulldir,
+                        filename);
+                } catch (Error err) {
+                    warning("Unable to fetch metadata for %s/%s: %s", fulldir, filename,
+                        err.message);
+                }
+            }
+            
+            // calculate EXIF's fingerprint
+            string? exif_only_md5 = null;
+            if (metadata != null) {
+                uint8[]? flattened_sans_thumbnail = metadata.flatten_exif(false);
+                if (flattened_sans_thumbnail != null && flattened_sans_thumbnail.length > 0)
+                    exif_only_md5 = md5_binary(flattened_sans_thumbnail, flattened_sans_thumbnail.length);
+            }
+            
+            // XXX: Cannot use the metadata for the thumbnail preview because libgphoto2
+            // 2.4.6 has a bug where the returned EXIF data object is complete garbage.  This
+            // is fixed in 2.4.7, but need to work around this as best we can.  In particular,
+            // this means the preview orientation will be wrong and the MD5 is not generated
+            // if the EXIF did not parse properly (see above)
+            
+            uint8[] preview_raw = null;
+            size_t preview_raw_length = 0;
+            Gdk.Pixbuf preview = null;
+            try {
+                string preview_fulldir = fulldir;
+                string preview_filename = filename;
+                if (associated != null) {
+                    preview_fulldir = associated.get_fulldir();
+                    preview_filename = associated.get_filename();
+                }
+                preview = GPhoto.load_preview(spin_idle_context.context, camera, preview_fulldir,
+                    preview_filename, out preview_raw, out preview_raw_length);
+            } catch (Error err) {
+                // only issue the warning message if we're not reading a video. GPhoto is capable
+                // of reading video previews about 50% of the time, so we don't want to put a guard
+                // around this entire code segment like we did with the metadata-read segment above,
+                // however video previews being absent is so common that there's no reason
+                // we should generate a warning for one.
+                if (!VideoReader.is_supported_video_filename(filename)) {
+                    warning("Unable to fetch preview for %s/%s: %s", fulldir, filename, err.message);
+                }
+            }
+            
+            // calculate thumbnail fingerprint
+            string? preview_md5 = null;
+            if (preview != null && preview_raw != null && preview_raw_length > 0)
+                preview_md5 = md5_binary(preview_raw, preview_raw_length);
+            
+#if TRACE_MD5
+            debug("camera MD5 %s: exif=%s preview=%s", filename, exif_only_md5, preview_md5);
+#endif
+
+            if (import_source is VideoImportSource)
+                (import_source as VideoImportSource).update(preview);
+
+            if (import_source is PhotoImportSource)
+                (import_source as PhotoImportSource).update(preview, preview_md5, metadata,
+                    exif_only_md5);
+            
+            if (associated != null) {
+                try {
+                    PhotoMetadata? associated_metadata = GPhoto.load_metadata(spin_idle_context.context, 
+                        camera, associated.get_fulldir(), associated.get_filename());
+                    associated.update(preview, preview_md5, associated_metadata, null);
+                } catch (Error err) {
+                    warning("Unable to fetch metadata for %s/%s: %s",  associated.get_fulldir(),
+                        associated.get_filename(), err.message);
+                }
+            }
+            
+            // *now* add to the SourceCollection, now that it is completed
+            import_sources.add(import_source);
+            
+            progress_bar.set_fraction((double) (++loaded_photos) / (double) import_list.size);
+#if UNITY_SUPPORT
+            //UnityProgressBar: set progress
+            uniprobar.set_progress((double) (loaded_photos) / (double) import_list.size);
+#endif
+            
+            // spin the event loop so the UI doesn't freeze
+            spin_event_loop();
+        }
+    }
+    
+    private void on_hide_imported() {
+        if (hide_imported.get_active())
+            get_view().install_view_filter(hide_imported_filter);
+        else
+            get_view().remove_view_filter(hide_imported_filter);
+        
+        Config.Facade.get_instance().set_hide_photos_already_imported(hide_imported.get_active());
+    }
+    
+    private void on_import_selected() {
+        import(get_view().get_selected());
+    }
+    
+    private void on_import_all() {
+        import(get_view().get_all());
+    }
+    
+    private void import(Gee.Iterable<DataObject> items) {
+        GPhoto.Result res = camera.init(spin_idle_context.context);
+        if (res != GPhoto.Result.OK) {
+            AppWindow.error_message(_("Unable to lock camera: %s").printf(res.to_full_string()));
+            
+            return;
+        }
+
+        update_status(true, refreshed);
+        
+        on_view_changed();
+        progress_bar.visible = false;
+
+        SortedList<CameraImportJob> jobs = new SortedList<CameraImportJob>(import_job_comparator);
+        Gee.ArrayList<CameraImportJob> already_imported = new Gee.ArrayList<CameraImportJob>();
+        
+        foreach (DataObject object in items) {
+            ImportPreview preview = (ImportPreview) object;
+            ImportSource import_file = (ImportSource) preview.get_source();
+            
+            if (preview.is_already_imported()) {
+                message("Skipping import of %s: checksum detected in library", 
+                    import_file.get_filename());
+                
+                already_imported.add(new CameraImportJob(null_context, import_file,
+                    preview.get_duplicated_file()));
+                
+                continue;
+            }
+            
+            CameraImportJob import_job = new CameraImportJob(null_context, import_file);
+            
+            // Maintain RAW+JPEG association.
+            if (import_file is PhotoImportSource && 
+                ((PhotoImportSource) import_file).get_associated() != null) {
+                import_job.set_associated(new CameraImportJob(null_context, 
+                    ((PhotoImportSource) import_file).get_associated()));
+            }
+            
+            jobs.add(import_job);
+        }
+        
+        debug("Importing %d files from %s", jobs.size, camera_name);
+        
+        if (jobs.size > 0) {
+            // see import_reporter() to see why this is held during the duration of the import
+            assert(local_ref == null);
+            local_ref = this;
+            
+            BatchImport batch_import = new BatchImport(jobs, camera_name, import_reporter,
+                null, already_imported);
+            batch_import.import_job_failed.connect(on_import_job_failed);
+            batch_import.import_complete.connect(close_import);
+            
+            LibraryWindow.get_app().enqueue_batch_import(batch_import, true);
+            LibraryWindow.get_app().switch_to_import_queue_page();
+            // camera.exit() and busy flag will be handled when the batch import completes
+        } else {
+            // since failed up-front, build a fake (faux?) ImportManifest and report it here
+            if (already_imported.size > 0)
+                import_reporter(new ImportManifest(null, already_imported));
+            
+            close_import();
+        }
+    }
+    
+    private void on_import_job_failed(BatchImportResult result) {
+        if (result.file == null || result.result == ImportResult.SUCCESS)
+            return;
+            
+        // delete the copied file
+        try {
+            result.file.delete(null);
+        } catch (Error err) {
+            message("Unable to delete downloaded file %s: %s", result.file.get_path(), err.message);
+        }
+    }
+    
+    private void import_reporter(ImportManifest manifest) {
+        // TODO: Need to keep the ImportPage around until the BatchImport is completed, but the
+        // page controller (i.e. LibraryWindow) needs to know (a) if ImportPage is busy before
+        // removing and (b) if it is, to be notified when it ain't.  Until that's in place, need
+        // to hold the ref so the page isn't destroyed ... this switcheroo keeps the ref alive
+        // until this function returns (at any time)
+        ImportPage? local_ref = this.local_ref;
+        this.local_ref = null;
+        
+        if (manifest.success.size > 0) {
+            string photos_string = (ngettext("Delete this photo from camera?",
+                "Delete these %d photos from camera?", 
+                manifest.success.size)).printf(manifest.success.size);
+            string videos_string = (ngettext("Delete this video from camera?",
+                "Delete these %d videos from camera?", 
+                manifest.success.size)).printf(manifest.success.size);
+            string both_string = (ngettext("Delete this photo/video from camera?",
+                "Delete these %d photos/videos from camera?", 
+                manifest.success.size)).printf(manifest.success.size);
+            string neither_string = (ngettext("Delete these files from camera?",
+                "Delete these %d files from camera?", 
+                manifest.success.size)).printf(manifest.success.size);
+
+            string question_string = ImportUI.get_media_specific_string(manifest.success,
+                photos_string, videos_string, both_string, neither_string);
+
+            ImportUI.QuestionParams question = new ImportUI.QuestionParams(
+                question_string, Gtk.Stock.DELETE, _("_Keep"));
+        
+            if (!ImportUI.report_manifest(manifest, false, question))
+                return;
+        } else {
+            ImportUI.report_manifest(manifest, false, null);
+            return;
+        }
+        
+        // delete the photos from the camera and the SourceCollection... for now, this is an 
+        // all-or-nothing deal
+        Marker marker = import_sources.start_marking();
+        foreach (BatchImportResult batch_result in manifest.success) {
+            CameraImportJob job = batch_result.job as CameraImportJob;
+            
+            marker.mark(job.get_source());
+        }
+        
+        ProgressDialog progress = new ProgressDialog(AppWindow.get_instance(), 
+            _("Removing photos/videos from camera"), new Cancellable());
+        int error_count = import_sources.destroy_marked(marker, true, progress.monitor);
+        if (error_count > 0) {
+            string error_string =
+                (ngettext("Unable to delete %d photo/video from the camera due to errors.",
+                "Unable to delete %d photos/videos from the camera due to errors.", error_count)).printf(
+                error_count);
+            AppWindow.error_message(error_string);
+        }
+        
+        progress.close();
+        
+        // to stop build warnings
+        local_ref = null;
+    }
+
+    private void close_import() {
+        GPhoto.Result res = camera.exit(spin_idle_context.context);
+        if (res != GPhoto.Result.OK) {
+            // log but don't fail
+            message("Unable to unlock camera: %s", res.to_full_string());
+        }
+        
+        update_status(false, refreshed);
+        
+        on_view_changed();
+    }
+
+    public override void set_display_titles(bool display) {
+        base.set_display_titles(display);
+    
+        Gtk.ToggleAction? action = get_action("ViewTitle") as Gtk.ToggleAction;
+        if (action != null)
+            action.set_active(display);
+    }
+    
+    // Gets the search view filter for this page.
+    public override SearchViewFilter get_search_view_filter() {
+        return search_filter;
+    }
+}
+