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Add function to get the size of the laid out document

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zathura_get_document_size computes the size of the document to be
displayed (in pixels), given the size of the individual cells. It takes
padding between the cells into account.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
This commit is contained in:
Benoît Knecht 2012-12-13 12:43:49 +01:00 committed by Sebastian Ramacher
parent 27d7973586
commit 99fbf0d17b
2 changed files with 54 additions and 0 deletions
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37
utils.c
View file

@ -299,6 +299,43 @@ page_calc_height_width(zathura_page_t* page, unsigned int* page_height, unsigned
}
}
void
zathura_get_document_size(zathura_t* zathura,
unsigned int cell_height, unsigned int cell_width,
unsigned int* height, unsigned int* width)
{
g_return_if_fail(zathura != NULL && zathura->document != NULL &&
height != NULL && width != NULL);
unsigned int pages_per_row = 1;
girara_setting_get(zathura->ui.session, "pages-per-row", &pages_per_row);
if (pages_per_row == 0)
pages_per_row = 1;
unsigned int first_page_column = 1;
girara_setting_get(zathura->ui.session, "first-page-column", &first_page_column);
if (first_page_column < 1)
first_page_column = 1;
if (first_page_column > pages_per_row)
first_page_column = (first_page_column - 1) % pages_per_row + 1;
int padding = 1;
girara_setting_get(zathura->ui.session, "page-padding", &padding);
double scale = zathura_document_get_scale(zathura->document);
cell_height = ceil(cell_height * scale);
cell_width = ceil(cell_width * scale);
*width = pages_per_row * cell_width + (pages_per_row - 1) * padding;
unsigned int effective_number_of_pages =
zathura_document_get_number_of_pages(zathura->document) +
first_page_column - 1;
unsigned int rows = effective_number_of_pages / pages_per_row +
(effective_number_of_pages % pages_per_row ? 1 : 0);
*height = rows * cell_height + (rows - 1) * padding;
}
GtkWidget*
zathura_page_get_widget(zathura_t* zathura, zathura_page_t* page)
{

17
utils.h
View file

@ -104,6 +104,23 @@ void set_adjustment(GtkAdjustment* adjust, gdouble value);
void
page_calc_height_width(zathura_page_t* page, unsigned int* page_height, unsigned int* page_width, bool rotate);
/**
* Compute the size of the entire document to be displayed (in pixels), taking
* into account the scale, the layout of the pages, and the padding between
* them. It should be equal to the allocation of zathura->ui.page_widget once
* it's shown.
*
* @param[in] zathura The zathura instance
* @param[in] cell_height,cell_width The height and width of a cell containing
* a single page; it should be obtained
* using zathura_document_get_cell_size()
* with the document scale set to 1.0
* @param[out] height,width The height and width of the document
*/
void zathura_get_document_size(zathura_t* zathura,
unsigned int cell_height, unsigned int cell_width,
unsigned int* height, unsigned int* width);
/**
* Returns the page widget of the page
*