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https://git.pwmt.org/pwmt/zathura.git
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use the new document functions in sc_scroll
This way we get rid of page_calculate_offset that involves explicit GTK calls. Also, we can make use of page_number_to_position to align page and viewport as desired. I've also tried to make the code for this function a bit more readable.
This commit is contained in:
Abdo Roig-Maranges
parent
ace0836a19
commit
e51a3265b6
1 changed files with 87 additions and 88 deletions
175
shortcuts.c
175
shortcuts.c
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@ -496,18 +496,14 @@ sc_scroll(girara_session_t* session, girara_argument_t* argument,
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t = 1;
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}
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GtkAdjustment* adjustment = NULL;
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if ( (argument->n == LEFT) || (argument->n == FULL_LEFT) || (argument->n == HALF_LEFT) ||
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(argument->n == RIGHT) || (argument->n == FULL_RIGHT) || (argument->n == HALF_RIGHT)) {
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adjustment = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(session->gtk.view));
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} else {
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adjustment = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(session->gtk.view));
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}
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unsigned int view_width=0, view_height=0;
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zathura_document_get_viewport_size(zathura->document, &view_height, &view_width);
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gdouble view_size = gtk_adjustment_get_page_size(adjustment);
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gdouble value = gtk_adjustment_get_value(adjustment);
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gdouble max = gtk_adjustment_get_upper(adjustment) - view_size;
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zathura->global.update_page_number = true;
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unsigned int cell_width=0, cell_height=0;
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zathura_document_get_cell_size(zathura->document, &cell_height, &cell_width);
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unsigned int doc_width=0, doc_height=0;
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zathura_document_get_document_size(zathura->document, &doc_height, &doc_width);
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float scroll_step = 40;
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girara_setting_get(session, "scroll-step", &scroll_step);
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@ -527,108 +523,111 @@ sc_scroll(girara_session_t* session, girara_argument_t* argument,
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int padding = 1;
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girara_setting_get(session, "page-padding", &padding);
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gdouble new_value;
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double pos_x = zathura_document_get_position_x(zathura->document);
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double pos_y = zathura_document_get_position_y(zathura->document);
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double page_id = zathura_document_get_current_page_number(zathura->document);
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double direction = 1.0;
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/* if TOP or BOTTOM, go there and we are done */
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if (argument->n == TOP) {
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position_set(zathura, -1, 0);
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return false;
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} else if (argument->n == BOTTOM) {
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position_set(zathura, -1, 1.0);
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return false;
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}
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/* compute the direction of scrolling */
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if ( (argument->n == LEFT) || (argument->n == FULL_LEFT) || (argument->n == HALF_LEFT) ||
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(argument->n == UP) || (argument->n == FULL_UP) || (argument->n == HALF_UP)) {
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direction = -1.0;
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} else {
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direction = 1.0;
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}
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double vstep = (double)(cell_height + padding) / (double)doc_height;
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double hstep = (double)(cell_width + padding) / (double)doc_width;
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/* compute new position */
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switch(argument->n) {
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case FULL_UP:
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case FULL_LEFT:
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new_value = value - (1.0 - scroll_full_overlap) * view_size - padding;
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break;
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case FULL_DOWN:
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pos_y += direction * (1.0 - scroll_full_overlap) * vstep;
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break;
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case FULL_LEFT:
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case FULL_RIGHT:
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new_value = value + (1.0 - scroll_full_overlap) * view_size + padding;
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pos_x += direction * (1.0 - scroll_full_overlap) * hstep;
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break;
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case HALF_UP:
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case HALF_LEFT:
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new_value = value - ((view_size + padding) / 2);
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break;
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case HALF_DOWN:
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pos_y += direction * 0.5 * vstep;
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break;
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case HALF_LEFT:
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case HALF_RIGHT:
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new_value = value + ((view_size + padding) / 2);
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break;
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case LEFT:
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new_value = value - scroll_hstep * t;
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pos_x += direction * 0.5 * hstep;
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break;
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case UP:
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new_value = value - scroll_step * t;
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break;
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case RIGHT:
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new_value = value + scroll_hstep * t;
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break;
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case DOWN:
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new_value = value + scroll_step * t;
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pos_y += direction * t * scroll_step / (double)doc_height;
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break;
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case TOP:
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new_value = 0;
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case LEFT:
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case RIGHT:
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pos_x += direction * t * scroll_hstep / (double)doc_width;
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break;
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case BOTTOM:
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new_value = max;
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break;
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default:
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new_value = value;
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}
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if (scroll_wrap == true) {
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if (new_value < 0)
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new_value = max;
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else if (new_value > max)
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new_value = 0;
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/* handle boundaries */
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double end_x = 0.5 * (double)view_width / (double)doc_width;
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double end_y = 0.5 * (double)view_height / (double)doc_height;
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double new_x = scroll_wrap ? 1.0 - end_x : end_x;
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double new_y = scroll_wrap ? 1.0 - end_y : end_y;
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if (pos_x < end_x) {
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pos_x = new_x;
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} else if (pos_x > 1.0 - end_x) {
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pos_x = 1 - new_x;
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}
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if (scroll_page_aware == true) {
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int page_offset;
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double page_size;
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if (pos_y < end_y) {
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pos_y = new_y;
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} else if (pos_y > 1.0 - end_y) {
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pos_y = 1 - new_y;
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}
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{
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unsigned int page_id = zathura_document_get_current_page_number(zathura->document);
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zathura_page_t* page = zathura_document_get_page(zathura->document, page_id);
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page_offset_t offset;
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page_calculate_offset(zathura, page, &offset);
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/* snap to the border if we change page */
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double dummy;
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unsigned int new_page_id = position_to_page_number(zathura->document, pos_x, pos_y);
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if (scroll_page_aware == true && page_id != new_page_id) {
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switch(argument->n) {
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case FULL_LEFT:
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case HALF_LEFT:
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page_number_to_position(zathura->document, new_page_id, 1.0, 0.0, &pos_x, &dummy);
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break;
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double scale = zathura_document_get_scale(zathura->document);
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case FULL_RIGHT:
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case HALF_RIGHT:
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page_number_to_position(zathura->document, new_page_id, 0.0, 0.0, &pos_x, &dummy);
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break;
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if ((argument->n == LEFT) || (argument->n == FULL_LEFT) || (argument->n == HALF_LEFT) ||
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(argument->n == RIGHT) || (argument->n == FULL_RIGHT) || (argument->n == HALF_RIGHT)) {
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page_offset = offset.x;
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page_size = zathura_page_get_width(page) * scale;
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} else {
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page_offset = offset.y;
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page_size = zathura_page_get_height(page) * scale;
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}
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case FULL_UP:
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case HALF_UP:
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page_number_to_position(zathura->document, new_page_id, 0.0, 1.0, &dummy, &pos_y);
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break;
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page_offset -= padding / 2;
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page_size += padding;
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}
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if ((argument->n == FULL_DOWN) || (argument->n == HALF_DOWN) ||
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(argument->n == FULL_RIGHT) || (argument->n == HALF_RIGHT)) {
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if ((page_offset > value) &&
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(page_offset < value + view_size)) {
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new_value = page_offset;
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} else if ((page_offset <= value) &&
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(page_offset + page_size < value + view_size)) {
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new_value = page_offset + page_size + 1;
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} else if ((page_offset <= value) &&
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(page_offset + page_size < new_value + view_size)) {
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new_value = page_offset + page_size - view_size + 1;
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}
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} else if ((argument->n == FULL_UP) || (argument->n == HALF_UP) ||
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(argument->n == FULL_LEFT) || (argument->n == HALF_LEFT)) {
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if ((page_offset + 1 >= value) &&
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(page_offset < value + view_size)) {
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new_value = page_offset - view_size;
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} else if ((page_offset <= value) &&
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(page_offset + page_size + 1 < value + view_size)) {
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new_value = page_offset + page_size - view_size;
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} else if ((page_offset <= value) &&
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(page_offset > new_value)) {
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new_value = page_offset;
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}
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case FULL_DOWN:
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case HALF_DOWN:
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page_number_to_position(zathura->document, new_page_id, 0.0, 0.0, &dummy, &pos_y);
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break;
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}
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}
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zathura_adjustment_set_value(adjustment, new_value);
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position_set(zathura, pos_x, pos_y);
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return false;
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}
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