void cb_view_vadjustment_value_changed(GtkAdjustment* GIRARA_UNUSED(adjustment), gpointer data) { zathura_t* zathura = data; if (zathura == NULL || zathura->document == NULL || zathura->ui.page_widget == NULL) { return; } GtkAdjustment* view_vadjustment = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(zathura->ui.session->gtk.view)); GtkAdjustment* view_hadjustment = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(zathura->ui.session->gtk.view)); GdkRectangle view_rect; /* get current adjustment values */ view_rect.y = 0; view_rect.height = gtk_adjustment_get_page_size(view_vadjustment); view_rect.x = 0; view_rect.width = gtk_adjustment_get_page_size(view_hadjustment); int page_padding = 1; girara_setting_get(zathura->ui.session, "page-padding", &page_padding); GdkRectangle center; center.x = (view_rect.width + 1) / 2; center.y = (view_rect.height + 1) / 2; center.height = center.width = (2 * page_padding) + 1; unsigned int number_of_pages = zathura_document_get_number_of_pages(zathura->document); double scale = zathura_document_get_scale(zathura->document); bool updated = false; /* find page that fits */ for (unsigned int page_id = 0; page_id < number_of_pages; page_id++) { zathura_page_t* page = zathura_document_get_page(zathura->document, page_id); GdkRectangle page_rect; GtkWidget* page_widget = zathura_page_get_widget(zathura, page); gtk_widget_translate_coordinates(page_widget, zathura->ui.session->gtk.view, 0, 0, &page_rect.x, &page_rect.y); page_rect.width = zathura_page_get_width(page) * scale; page_rect.height = zathura_page_get_height(page) * scale; if (gdk_rectangle_intersect(&view_rect, &page_rect, NULL) == TRUE) { zathura_page_set_visibility(page, true); if (zathura->global.update_page_number == true && updated == false && gdk_rectangle_intersect(¢er, &page_rect, NULL) == TRUE) { zathura_document_set_current_page_number(zathura->document, page_id); updated = true; } } else { zathura_page_set_visibility(page, false); } zathura_page_widget_update_view_time(ZATHURA_PAGE(page_widget)); } statusbar_page_number_update(zathura); }
bool cb_sc_follow(GtkEntry* entry, girara_session_t* session) { g_return_val_if_fail(session != NULL, FALSE); g_return_val_if_fail(session->global.data != NULL, FALSE); zathura_t* zathura = session->global.data; bool eval = true; char* input = gtk_editable_get_chars(GTK_EDITABLE(entry), 0, -1); if (input == NULL || strlen(input) == 0) { eval = false; } int index = 0; if (eval == true) { index = atoi(input); if (index == 0 && g_strcmp0(input, "0") != 0) { girara_notify(session, GIRARA_WARNING, _("Invalid input '%s' given."), input); eval = false; } index = index - 1; } /* set pages to draw links */ bool invalid_index = true; unsigned int number_of_pages = zathura_document_get_number_of_pages(zathura->document); for (unsigned int page_id = 0; page_id < number_of_pages; page_id++) { zathura_page_t* page = zathura_document_get_page(zathura->document, page_id); if (page == NULL || zathura_page_get_visibility(page) == false) { continue; } GtkWidget* page_widget = zathura_page_get_widget(zathura, page); g_object_set(page_widget, "draw-links", FALSE, NULL); if (eval == true) { zathura_link_t* link = zathura_page_widget_link_get(ZATHURA_PAGE(page_widget), index); if (link != NULL) { zathura_link_evaluate(zathura, link); invalid_index = false; } } } if (eval == true && invalid_index == true) { girara_notify(session, GIRARA_WARNING, _("Invalid index '%s' given."), input); } g_free(input); return (eval == TRUE) ? TRUE : FALSE; }
void update_visible_pages(zathura_t* zathura) { const unsigned int number_of_pages = zathura_document_get_number_of_pages(zathura->document); for (unsigned int page_id = 0; page_id < number_of_pages; page_id++) { zathura_page_t* page = zathura_document_get_page(zathura->document, page_id); GtkWidget* page_widget = zathura_page_get_widget(zathura, page); ZathuraPage* zathura_page_widget = ZATHURA_PAGE(page_widget); if (page_is_visible(zathura->document, page_id) == true) { /* make page visible */ if (zathura_page_get_visibility(page) == false) { zathura_page_set_visibility(page, true); zathura_page_widget_update_view_time(zathura_page_widget); zathura_renderer_page_cache_add(zathura->sync.render_thread, zathura_page_get_index(page)); } } else { /* make page invisible */ if (zathura_page_get_visibility(page) == true) { zathura_page_set_visibility(page, false); /* If a page becomes invisible, abort the render request. */ zathura_page_widget_abort_render_request(zathura_page_widget); } /* reset current search result */ girara_list_t* results = NULL; GObject* obj_page_widget = G_OBJECT(page_widget); g_object_get(obj_page_widget, "search-results", &results, NULL); if (results != NULL) { g_object_set(obj_page_widget, "search-current", 0, NULL); } } } }
void cb_view_vadjustment_value_changed(GtkAdjustment* GIRARA_UNUSED(adjustment), gpointer data) { zathura_t* zathura = data; if (zathura == NULL || zathura->document == NULL || zathura->ui.page_widget == NULL) { return; } GtkAdjustment* view_vadjustment = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(zathura->ui.session->gtk.view)); GtkAdjustment* view_hadjustment = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(zathura->ui.session->gtk.view)); /* current adjustment values */ GdkRectangle view_rect = { .x = 0, .y = 0, .width = gtk_adjustment_get_page_size(view_hadjustment), .height = gtk_adjustment_get_page_size(view_vadjustment) }; int page_padding = 1; girara_setting_get(zathura->ui.session, "page-padding", &page_padding); GdkRectangle center = { .x = (view_rect.width + 1) / 2, .y = (view_rect.height + 1) / 2, .width = (2 * page_padding) + 1, .height = (2 * page_padding) + 1 }; unsigned int number_of_pages = zathura_document_get_number_of_pages(zathura->document); double scale = zathura_document_get_scale(zathura->document); bool updated = false; /* find page that fits */ for (unsigned int page_id = 0; page_id < number_of_pages; page_id++) { zathura_page_t* page = zathura_document_get_page(zathura->document, page_id); GdkRectangle page_rect = { .width = zathura_page_get_width(page) * scale, .height = zathura_page_get_height(page) * scale }; GtkWidget* page_widget = zathura_page_get_widget(zathura, page); gtk_widget_translate_coordinates(page_widget, zathura->ui.session->gtk.view, 0, 0, &page_rect.x, &page_rect.y); if (gdk_rectangle_intersect(&view_rect, &page_rect, NULL) == TRUE) { zathura_page_set_visibility(page, true); if (zathura->global.update_page_number == true && updated == false && gdk_rectangle_intersect(¢er, &page_rect, NULL) == TRUE) { zathura_document_set_current_page_number(zathura->document, page_id); updated = true; } } else { zathura_page_set_visibility(page, false); } zathura_page_widget_update_view_time(ZATHURA_PAGE(page_widget)); } statusbar_page_number_update(zathura); } void cb_pages_per_row_value_changed(girara_session_t* session, const char* UNUSED(name), girara_setting_type_t UNUSED(type), void* value, void* UNUSED(data)) { g_return_if_fail(value != NULL); g_return_if_fail(session != NULL); g_return_if_fail(session->global.data != NULL); zathura_t* zathura = session->global.data; int pages_per_row = *(int*) value; if (pages_per_row < 1) { pages_per_row = 1; } unsigned int first_page_column = 1; girara_setting_get(session, "first-page-column", &first_page_column); page_widget_set_mode(zathura, pages_per_row, first_page_column); if (zathura->document != NULL) { unsigned int current_page = zathura_document_get_current_page_number(zathura->document); page_set_delayed(zathura, current_page); } }
static bool render(zathura_t* zathura, zathura_page_t* page) { if (zathura == NULL || page == NULL || zathura->sync.render_thread->about_to_close == true) { return false; } /* create cairo surface */ unsigned int page_width = 0; unsigned int page_height = 0; page_calc_height_width(page, &page_height, &page_width, false); cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, page_width, page_height); if (surface == NULL) { return false; } cairo_t* cairo = cairo_create(surface); if (cairo == NULL) { cairo_surface_destroy(surface); return false; } cairo_save(cairo); cairo_set_source_rgb(cairo, 1, 1, 1); cairo_rectangle(cairo, 0, 0, page_width, page_height); cairo_fill(cairo); cairo_restore(cairo); cairo_save(cairo); double scale = zathura_document_get_scale(zathura->document); if (fabs(scale - 1.0f) > FLT_EPSILON) { cairo_scale(cairo, scale, scale); } render_lock(zathura->sync.render_thread); if (zathura_page_render(page, cairo, false) != ZATHURA_ERROR_OK) { render_unlock(zathura->sync.render_thread); cairo_destroy(cairo); cairo_surface_destroy(surface); return false; } render_unlock(zathura->sync.render_thread); cairo_restore(cairo); cairo_destroy(cairo); const int rowstride = cairo_image_surface_get_stride(surface); unsigned char* image = cairo_image_surface_get_data(surface); /* recolor */ /* uses a representation of a rgb color as follows: - a lightness scalar (between 0,1), which is a weighted average of r, g, b, - a hue vector, which indicates a radian direction from the grey axis, inside the equal lightness plane. - a saturation scalar between 0,1. It is 0 when grey, 1 when the color is in the boundary of the rgb cube. */ if (zathura->global.recolor == true) { /* RGB weights for computing lightness. Must sum to one */ double a[] = {0.30, 0.59, 0.11}; double l1, l2, l, s, u, t; double h[3]; double rgb1[3], rgb2[3], rgb[3]; color2double(&zathura->ui.colors.recolor_dark_color, rgb1); color2double(&zathura->ui.colors.recolor_light_color, rgb2); l1 = (a[0]*rgb1[0] + a[1]*rgb1[1] + a[2]*rgb1[2]); l2 = (a[0]*rgb2[0] + a[1]*rgb2[1] + a[2]*rgb2[2]); for (unsigned int y = 0; y < page_height; y++) { unsigned char* data = image + y * rowstride; for (unsigned int x = 0; x < page_width; x++) { /* Careful. data color components blue, green, red. */ rgb[0] = (double) data[2] / 256.; rgb[1] = (double) data[1] / 256.; rgb[2] = (double) data[0] / 256.; /* compute h, s, l data */ l = a[0]*rgb[0] + a[1]*rgb[1] + a[2]*rgb[2]; h[0] = rgb[0] - l; h[1] = rgb[1] - l; h[2] = rgb[2] - l; /* u is the maximum possible saturation for given h and l. s is a rescaled saturation between 0 and 1 */ u = colorumax(h, l, 0, 1); if (u == 0) { s = 0; } else { s = 1/u; } /* Interpolates lightness between light and dark colors. white goes to light, and black goes to dark. */ t = l; l = t * (l2 - l1) + l1; if (zathura->global.recolor_keep_hue == true) { /* adjusting lightness keeping hue of current color. white and black go to grays of same ligtness as light and dark colors. */ u = colorumax(h, l, l1, l2); data[2] = (unsigned char)round(255.*(l + s*u * h[0])); data[1] = (unsigned char)round(255.*(l + s*u * h[1])); data[0] = (unsigned char)round(255.*(l + s*u * h[2])); } else { /* Linear interpolation between dark and light with color ligtness as a parameter */ data[2] = (unsigned char)round(255.*(t * (rgb2[0] - rgb1[0]) + rgb1[0])); data[1] = (unsigned char)round(255.*(t * (rgb2[1] - rgb1[1]) + rgb1[1])); data[0] = (unsigned char)round(255.*(t * (rgb2[2] - rgb1[2]) + rgb1[2])); } data += 4; } } } if (zathura->sync.render_thread->about_to_close == false) { /* update the widget */ gdk_threads_enter(); GtkWidget* widget = zathura_page_get_widget(zathura, page); zathura_page_widget_update_surface(ZATHURA_PAGE(widget), surface); gdk_threads_leave(); } else { cairo_surface_destroy(surface); } return true; }