/*
 * Copyright (C) 2007 Carlos Garcia Campos  <carlosgc@gnome.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include <gtk/gtk.h>

#include "transitions.h"

enum
{
    TRANSITIONS_PAGE_COLUMN,
    TRANSITIONS_TYPE_COLUMN,
    TRANSITIONS_ALIGNMENT_COLUMN,
    TRANSITIONS_DIRECTION_COLUMN,
    TRANSITIONS_DURATION_COLUMN,
    TRANSITIONS_ANGLE_COLUMN,
    TRANSITIONS_SCALE_COLUMN,
    TRANSITIONS_RECTANGULAR_COLUMN,
    N_COLUMNS
};

typedef struct
{
    PopplerDocument *doc;

    GtkWidget *treeview;
    GtkWidget *progress;

    guint idle_id;
} PgdTransitionsDemo;

static void pgd_transitions_free(PgdTransitionsDemo *demo)
{
    if (!demo) {
        return;
    }

    if (demo->idle_id > 0) {
        g_source_remove(demo->idle_id);
        demo->idle_id = 0;
    }

    if (demo->doc) {
        g_object_unref(demo->doc);
        demo->doc = NULL;
    }

    g_free(demo);
}

static const gchar *transition_type_to_string(PopplerPageTransitionType type)
{
    switch (type) {
    case POPPLER_PAGE_TRANSITION_REPLACE:
        return "Replace";
    case POPPLER_PAGE_TRANSITION_SPLIT:
        return "Split";
    case POPPLER_PAGE_TRANSITION_BLINDS:
        return "Blinds";
    case POPPLER_PAGE_TRANSITION_BOX:
        return "Box";
    case POPPLER_PAGE_TRANSITION_WIPE:
        return "Wipe";
    case POPPLER_PAGE_TRANSITION_DISSOLVE:
        return "Dissolve";
    case POPPLER_PAGE_TRANSITION_GLITTER:
        return "Glitter";
    case POPPLER_PAGE_TRANSITION_FLY:
        return "Fly";
    case POPPLER_PAGE_TRANSITION_PUSH:
        return "Push";
    case POPPLER_PAGE_TRANSITION_COVER:
        return "Cover";
    case POPPLER_PAGE_TRANSITION_UNCOVER:
        return "Uncover";
    case POPPLER_PAGE_TRANSITION_FADE:
        return "Fade";
    }

    return "Unknown";
}

static const gchar *transition_alignment_to_string(PopplerPageTransitionAlignment alignment)
{
    return alignment == POPPLER_PAGE_TRANSITION_HORIZONTAL ? "Horizontal" : "Vertical";
}

static const gchar *transition_direction_to_string(PopplerPageTransitionDirection direction)
{
    return direction == POPPLER_PAGE_TRANSITION_INWARD ? "Inward" : "Outward";
}

static void pgd_transitions_update_progress(PgdTransitionsDemo *demo, gint n_pages, gint scanned)
{
    gchar *str;

    str = g_strdup_printf("Scanning transitions (%d%%)", MIN(scanned * 100 / n_pages, 100));
    gtk_progress_bar_set_text(GTK_PROGRESS_BAR(demo->progress), str);
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(demo->progress), MIN((gdouble)scanned / n_pages, 1.0));
    g_free(str);
}

static gboolean pgd_transitions_fill_model(PgdTransitionsDemo *demo)
{
    GtkTreeModel *model;
    gint i, n_pages;

    n_pages = poppler_document_get_n_pages(demo->doc);

    model = gtk_tree_view_get_model(GTK_TREE_VIEW(demo->treeview));
    g_object_ref(model);

    for (i = 0; i < n_pages; i++) {
        PopplerPage *page;
        PopplerPageTransition *transition;

        pgd_transitions_update_progress(demo, n_pages, i);

        while (gtk_events_pending()) {
            gtk_main_iteration();
        }

        page = poppler_document_get_page(demo->doc, i);
        if (!page) {
            continue;
        }

        transition = poppler_page_get_transition(page);
        if (transition) {
            GtkTreeIter iter;
            gchar *npage;
            gchar *duration;
            gchar *angle;
            gchar *scale;

            npage = g_strdup_printf("%d", i + 1);
            duration = g_strdup_printf("%.2f", transition->duration_real);
            angle = g_strdup_printf("%d", transition->angle);
            scale = g_strdup_printf("%.2f", transition->scale);

            gtk_list_store_append(GTK_LIST_STORE(model), &iter);
            gtk_list_store_set(GTK_LIST_STORE(model), &iter, TRANSITIONS_PAGE_COLUMN, npage, TRANSITIONS_TYPE_COLUMN, transition_type_to_string(transition->type), TRANSITIONS_ALIGNMENT_COLUMN,
                               transition_alignment_to_string(transition->alignment), TRANSITIONS_DIRECTION_COLUMN, transition_direction_to_string(transition->direction), TRANSITIONS_DURATION_COLUMN, duration, TRANSITIONS_ANGLE_COLUMN,
                               angle, TRANSITIONS_SCALE_COLUMN, scale, TRANSITIONS_RECTANGULAR_COLUMN, transition->rectangular ? "Yes" : "No", -1);
            g_free(npage);
            g_free(duration);
            g_free(angle);
            g_free(scale);

            poppler_page_transition_free(transition);
        }

        g_object_unref(page);
    }

    pgd_transitions_update_progress(demo, n_pages, n_pages);
    g_object_unref(model);

    return FALSE;
}

static void pgd_transitions_scan_button_clicked(GtkButton *button, PgdTransitionsDemo *demo)
{
    if (demo->idle_id > 0) {
        g_source_remove(demo->idle_id);
    }

    demo->idle_id = g_idle_add((GSourceFunc)pgd_transitions_fill_model, demo);
}

static GtkWidget *pgd_transitions_create_list(GtkTreeModel *model)
{
    GtkWidget *treeview;
    GtkCellRenderer *renderer;

    treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
    gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(treeview), TRUE);
    gtk_tree_selection_set_mode(gtk_tree_view_get_selection(GTK_TREE_VIEW(treeview)), GTK_SELECTION_NONE);

    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 0, "Page", renderer, "text", TRANSITIONS_PAGE_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 1, "Type", renderer, "text", TRANSITIONS_TYPE_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 2, "Alignment", renderer, "text", TRANSITIONS_ALIGNMENT_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 3, "Direction", renderer, "text", TRANSITIONS_DIRECTION_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 4, "Duration", renderer, "text", TRANSITIONS_DURATION_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 5, "Angle", renderer, "text", TRANSITIONS_ANGLE_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 6, "Scale", renderer, "text", TRANSITIONS_SCALE_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(treeview), 7, "Rectangular", renderer, "text", TRANSITIONS_RECTANGULAR_COLUMN, NULL);
    return treeview;
}

GtkWidget *pgd_transitions_create_widget(PopplerDocument *document)
{
    PgdTransitionsDemo *demo;
    GtkWidget *vbox;
    GtkListStore *model;
    GtkWidget *swindow;
    GtkWidget *hbox, *button;

    demo = g_new0(PgdTransitionsDemo, 1);

    demo->doc = g_object_ref(document);

    vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 12);

    hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);

    demo->progress = gtk_progress_bar_new();
    gtk_progress_bar_set_ellipsize(GTK_PROGRESS_BAR(demo->progress), PANGO_ELLIPSIZE_END);
    gtk_box_pack_start(GTK_BOX(hbox), demo->progress, TRUE, TRUE, 0);
    gtk_widget_show(demo->progress);

    button = gtk_button_new_with_label("Scan");
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(pgd_transitions_scan_button_clicked), (gpointer)demo);
    gtk_box_pack_end(GTK_BOX(hbox), button, FALSE, FALSE, 0);
    gtk_widget_show(button);

    gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 6);
    gtk_widget_show(hbox);

    swindow = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    model = gtk_list_store_new(N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING);
    demo->treeview = pgd_transitions_create_list(GTK_TREE_MODEL(model));
    g_object_unref(model);

    gtk_container_add(GTK_CONTAINER(swindow), demo->treeview);
    gtk_widget_show(demo->treeview);

    gtk_box_pack_start(GTK_BOX(vbox), swindow, TRUE, TRUE, 0);
    gtk_widget_show(swindow);

    g_object_weak_ref(G_OBJECT(swindow), (GWeakNotify)pgd_transitions_free, (gpointer)demo);

    return vbox;
}
