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Page wrap on scroll, Centered PDF

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Added following functionality:
  * Center the PDF within the window
  * Jump to next/previous page if you scroll of the end/beginning
    of the page

Fixes and other changes:
  * Auto-adjust zoom when the page was rotated

Important note:
Above changes have been provided by sykora: Thank you very much
for your effort!
This commit is contained in:
Moritz Lipp 2009-10-30 00:16:43 +01:00
parent b87a5725f9
commit 58dcfb001d
1 changed files with 112 additions and 14 deletions
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126
zathura.c
View file

@ -712,14 +712,74 @@ sc_scroll(Argument *argument)
gdouble value = gtk_adjustment_get_value(adjustment);
gdouble max = gtk_adjustment_get_upper(adjustment) - view_size;
if( (argument->n == LEFT) || (argument->n == DOWN))
gtk_adjustment_set_value(adjustment, (value - SCROLL_STEP) < 0 ? 0 : (value - SCROLL_STEP));
else if (argument->n == TOP)
gtk_adjustment_set_value(adjustment, 0);
else if(argument->n == BOTTOM)
gtk_adjustment_set_value(adjustment, max);
else
gtk_adjustment_set_value(adjustment, (value + SCROLL_STEP) > max ? max : (value + SCROLL_STEP));
int number_of_pages = poppler_document_get_n_pages(Zathura.PDF.document);
int new_page = Zathura.PDF.page_number;
int next_page = abs( (new_page + number_of_pages + 1) % number_of_pages);
int previous_page = abs( (new_page + number_of_pages - 1) % number_of_pages);
switch(argument->n)
{
case TOP:
if ((value == 0 && previous_page >= 0))
{
set_page(previous_page);
gtk_adjustment_set_value(adjustment, max);
draw();
update_status();
}
else
{
gtk_adjustment_set_value(adjustment, 0);
}
break;
case BOTTOM:
if ((value >= max && next_page <= Zathura.PDF.number_of_pages))
{
set_page(next_page);
gtk_adjustment_set_value(adjustment, 0);
draw();
update_status();
}
else
{
gtk_adjustment_set_value(adjustment, max);
}
break;
case LEFT:
gtk_adjustment_set_value(adjustment, (value - SCROLL_STEP) < 0 ? 0 : (value - SCROLL_STEP));
break;
case DOWN:
if ((value - SCROLL_STEP) < 0 && previous_page >= 0)
{
set_page(previous_page);
gtk_adjustment_set_value(adjustment, max);
draw();
update_status();
}
else
{
gtk_adjustment_set_value(adjustment, value - SCROLL_STEP);
}
break;
case RIGHT:
gtk_adjustment_set_value(adjustment, (value + SCROLL_STEP) > max ? max : (value + SCROLL_STEP));
break;
case UP:
if ((value + SCROLL_STEP) > max && next_page <= Zathura.PDF.number_of_pages)
{
set_page(next_page);
gtk_adjustment_set_value(adjustment, 0);
draw();
update_status();
}
else
{
gtk_adjustment_set_value(adjustment, value + SCROLL_STEP);
}
break;
}
}
void
@ -734,11 +794,10 @@ sc_navigate(Argument *argument)
new_page = abs( (new_page + number_of_pages - 1) % number_of_pages);
set_page(new_page);
GtkAdjustment* adjustment;
adjustment = gtk_scrolled_window_get_vadjustment(Zathura.view);
gtk_adjustment_set_value(adjustment, 0);
Argument reset;
reset.n = TOP;
sc_scroll(&reset);
draw();
update_status();
@ -773,6 +832,14 @@ sc_adjust_window(Argument *argument)
view_size = gtk_adjustment_get_page_size(adjustment);
poppler_page_get_size(Zathura.PDF.page, &page_width, &page_height);
// If document is on its side, then width is height and vice versa.
if ((Zathura.PDF.rotate == 90) || (Zathura.PDF.rotate == 270))
{
double swap = page_width;
page_width = page_height;
page_height = swap;
}
if(argument->n == ADJUST_WIDTH)
Zathura.PDF.scale = view_size / page_height;
else
@ -1260,7 +1327,38 @@ cb_draw(GtkWidget *widget, gpointer data)
{
gdk_window_clear(widget->window);
cairo_t *cairo = gdk_cairo_create(widget->window);
cairo_set_source_surface(cairo, Zathura.PDF.surface, 0, 0);
/* Center the PDF if it is smaller than the window. */
double page_width, page_height, width, height;
poppler_page_get_size(Zathura.PDF.page, &page_width, &page_height);
if(Zathura.PDF.rotate == 0 || Zathura.PDF.rotate == 180)
{
width = page_width * Zathura.PDF.scale;
height = page_height * Zathura.PDF.scale;
}
else
{
width = page_height * Zathura.PDF.scale;
height = page_width * Zathura.PDF.scale;
}
int window_x, window_y;
gdk_drawable_get_size(widget->window, &window_x, &window_y);
int offset_x, offset_y;
if (window_x > width)
offset_x = (window_x - width) / 2;
else
offset_x = 0;
if (window_y > height)
offset_y = (window_y - height) / 2;
else
offset_y = 0;
cairo_set_source_surface(cairo, Zathura.PDF.surface, offset_x, offset_y);
cairo_paint(cairo);
cairo_destroy(cairo);
}
@ -1527,7 +1625,7 @@ main(int argc, char* argv[])
gtk_widget_show_all(GTK_WIDGET(Zathura.window));
Argument arg;
arg.n = ADJUST_BESTFIT;
arg.n = ADJUST_WIDTH;
sc_adjust_window(&arg);
gtk_main();