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Render page when needed

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This commit is contained in:
Moritz Lipp 2011-01-06 08:59:10 +01:00
parent ce09e56e2a
commit 88d4766a75
3 changed files with 54 additions and 10 deletions
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50
callbacks.c
View file

@ -41,17 +41,27 @@ cb_view_vadjustment_value_changed(GtkAdjustment *adjustment, gpointer data)
}
/* get current adjustment values */
gdouble lower = gtk_adjustment_get_lower(adjustment);
gdouble upper = gtk_adjustment_get_lower(adjustment);
gdouble lower = gtk_adjustment_get_value(adjustment);
gdouble upper = lower + gtk_adjustment_get_page_size(adjustment);
/* find page that fits */
for(unsigned int page_id = 0; page_id < Zathura.document->number_of_pages; page_id++)
{
zathura_page_t* page = Zathura.document->pages[page_id];
double begin = page->offset;
double end = page->offset + page->height;
if( begin <= 10 ) { // FIXME
/* check for rendered attribute */
if(page->rendered) {
continue;
}
double begin = page->offset;
double end = page->offset + page->height;
if( ( (begin >= lower) && (end <= upper) ) /* page is in viewport */
|| ( (begin <= lower) && (end >= lower) && (end <= upper) ) /* end of the page is in viewport */
|| ( (begin >= lower) && (end >= upper) && (begin <= upper) ) /* begin of the page is in viewport */
) {
/* render page */
GtkWidget* image = zathura_page_render(page);
if(!image) {
@ -60,8 +70,34 @@ cb_view_vadjustment_value_changed(GtkAdjustment *adjustment, gpointer data)
}
/* add new page */
gtk_box_pack_start(GTK_BOX(Zathura.UI.page_view), image, TRUE, TRUE, 0);
gtk_box_reorder_child(GTK_BOX(Zathura.UI.page_view), image, page->number);
GList* list = gtk_container_get_children(GTK_CONTAINER(Zathura.UI.page_view));
GtkWidget* widget = (GtkWidget*) g_list_nth_data(list, page_id);
if(widget) {
/* child packaging information */
gboolean expand;
gboolean fill;
guint padding;
GtkPackType pack_type;
gtk_box_query_child_packing(GTK_BOX(Zathura.UI.page_view), widget, &expand, &fill, &padding, &pack_type);
/* delete old widget */
gtk_container_remove(GTK_CONTAINER(Zathura.UI.page_view), widget);
/* add new widget */
gtk_box_pack_start(GTK_BOX(Zathura.UI.page_view), image, TRUE, TRUE, 0);
/* set old packaging values */
gtk_box_set_child_packing(GTK_BOX(Zathura.UI.page_view), image, expand, fill, padding, pack_type);
/* reorder child */
gtk_box_reorder_child(GTK_BOX(Zathura.UI.page_view), image, page_id);
} else {
printf("error: page container does not exist\n");
g_object_unref(image);
return;
}
}
}
}

13
ft/document.c
View file

@ -110,8 +110,9 @@ zathura_document_open(const char* path, const char* password)
goto error_free;
}
page->offset = offset;
page->number = page_id;
page->offset = offset;
page->number = page_id;
page->rendered = false;
offset += page->height;
@ -343,7 +344,13 @@ zathura_page_render(zathura_page_t* page)
return NULL;
}
return page->document->functions.page_render(page);
GtkWidget* widget = page->document->functions.page_render(page);
if(widget) {
page->rendered = true;
}
return widget;
}
zathura_index_element_t*

1
ft/document.h
View file

@ -81,6 +81,7 @@ typedef struct zathura_page_s
unsigned int number;
zathura_document_t* document;
void* data;
bool rendered;
} zathura_page_t;
struct zathura_document_s