mirror of
https://git.pwmt.org/pwmt/zathura.git
synced 2024-11-10 22:03:48 +01:00
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* See LICENSE file for license and copyright information */
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#include <callbacks.h>
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#include <girara.h>
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#include <stdlib.h>
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#include <gtk/gtk.h>
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#include "zathura.h"
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#include "render.h"
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#include "document.h"
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#include "utils.h"
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gboolean
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cb_destroy(GtkWidget* widget, gpointer data)
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{
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zathura_free(data);
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return TRUE;
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}
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void
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buffer_changed(girara_session_t* session)
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{
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g_return_if_fail(session != NULL);
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g_return_if_fail(session->global.data != NULL);
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zathura_t* zathura = session->global.data;
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char* buffer = girara_buffer_get(session);
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if (buffer) {
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girara_statusbar_item_set_text(session, zathura->ui.statusbar.buffer, buffer);
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free(buffer);
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} else {
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girara_statusbar_item_set_text(session, zathura->ui.statusbar.buffer, "");
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}
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}
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void
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cb_view_vadjustment_value_changed(GtkAdjustment *adjustment, gpointer data)
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{
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zathura_t* zathura = data;
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if (!zathura || !zathura->document || !zathura->document->pages || !zathura->ui.page_view) {
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return;
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}
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/* get current adjustment values */
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gdouble lower = gtk_adjustment_get_value(adjustment);
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gdouble upper = lower + gtk_adjustment_get_page_size(adjustment);
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/* find page that fits */
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for (unsigned int page_id = 0; page_id < zathura->document->number_of_pages; page_id++)
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{
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zathura_page_t* page = zathura->document->pages[page_id];
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page_offset_t* offset = page_calculate_offset(page);
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if (offset == NULL) {
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continue;
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}
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double begin = offset->y;
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double end = offset->y + page->height;
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if ( ( (begin >= lower) && (end <= upper) ) /* [> page is in viewport <]*/
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|| ( (begin <= lower) && (end >= lower) && (end <= upper) ) /* [> end of the page is in viewport <] */
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|| ( (begin >= lower) && (end >= upper) && (begin <= upper) ) /* [> begin of the page is in viewport <] */
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) {
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page->visible = true;
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if (page->surface == NULL) {
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render_page(zathura->sync.render_thread, page);
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}
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} else {
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page->visible = false;
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cairo_surface_destroy(page->surface);
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page->surface = NULL;
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}
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free(offset);
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}
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}
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