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Introduce page aware scrolling

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if scroll-page-aware is set, scrolling by full and half pages stops at
page boundaries (as djview4 does it on <space> and <backspace>).

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
This commit is contained in:
Jonas Hoersch 2012-09-15 18:00:15 +02:00 committed by Sebastian Ramacher
parent d76e33e3ec
commit 9c9d07a615
2 changed files with 57 additions and 0 deletions
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2
config.c
View file

@ -173,6 +173,8 @@ config_load_default(zathura_t* zathura)
bool_value = false;
girara_setting_add(gsession, "scroll-wrap", &bool_value, BOOLEAN, false, _("Wrap scrolling"), NULL, NULL);
bool_value = false;
girara_setting_add(gsession, "scroll-page-aware", &bool_value, BOOLEAN, false, _("Page aware scrolling"), NULL, NULL);
bool_value = false;
girara_setting_add(gsession, "advance-pages-per-row", &bool_value, BOOLEAN, false, _("Advance number of pages per row"), NULL, NULL);
bool_value = false;
girara_setting_add(gsession, "zoom-center", &bool_value, BOOLEAN, false, _("Horizontally centered zoom"), NULL, NULL);

55
shortcuts.c
View file

@ -565,6 +565,8 @@ sc_scroll(girara_session_t* session, girara_argument_t* argument,
}
float scroll_full_overlap = 0.1;
girara_setting_get(session, "scroll-full-overlap", &scroll_full_overlap);
bool scroll_page_aware = false;
girara_setting_get(session, "scroll-page-aware", &scroll_page_aware);
int padding = 1;
girara_setting_get(session, "page-padding", &padding);
@ -610,6 +612,59 @@ sc_scroll(girara_session_t* session, girara_argument_t* argument,
new_value = value;
}
if (scroll_page_aware) {
int page_offset;
double page_size;
{
unsigned int page_id = zathura_document_get_current_page_number(zathura->document);
zathura_page_t* page = zathura_document_get_page(zathura->document, page_id);
page_offset_t offset;
page_calculate_offset(zathura, page, &offset);
double scale = zathura_document_get_scale(zathura->document);
if ( (argument->n == LEFT) || (argument->n == FULL_LEFT) || (argument->n == HALF_LEFT) ||
(argument->n == RIGHT) || (argument->n == FULL_RIGHT) || (argument->n == HALF_RIGHT)) {
page_offset = offset.x;
page_size = zathura_page_get_width(page) * scale;
} else {
page_offset = offset.y;
page_size = zathura_page_get_height(page) * scale;
}
page_offset -= padding / 2;
page_size += padding;
}
if ( (argument->n==FULL_DOWN) || (argument->n==HALF_DOWN) ||
(argument->n==FULL_RIGHT) || (argument->n==HALF_RIGHT) )
{
if ( (page_offset > value) &&
(page_offset < value + view_size) )
new_value = page_offset;
else if ( (page_offset <= value) &&
(page_offset + page_size < value + view_size) )
new_value = page_offset + page_size + 1;
else if ( (page_offset <= value) &&
(page_offset + page_size < new_value + view_size) )
new_value = page_offset + page_size - view_size + 1;
}
else if ( (argument->n==FULL_UP) || (argument->n==HALF_UP) ||
(argument->n==FULL_LEFT) || (argument->n==HALF_LEFT) )
{
if ( (page_offset + 1 >= value) &&
(page_offset < value + view_size) )
new_value = page_offset - view_size;
else if ( (page_offset <= value) &&
(page_offset + page_size + 1 < value + view_size) )
new_value = page_offset + page_size - view_size;
else if ( (page_offset <= value) &&
(page_offset > new_value) )
new_value = page_offset;
}
}
set_adjustment(adjustment, new_value);
return false;