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reader_scroll.c
83 lines (63 loc) · 2.47 KB
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reader_scroll.c
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#include "reader_chunks.h"
gboolean auto_scroll_update(gpointer user_data)
{
APP* app = (APP*)user_data;
GtkScrolledWindow* scrolled_window = app->text_scrolledwindow;
GtkAdjustment* adj = gtk_scrolled_window_get_vadjustment(scrolled_window);
double scroll_pos = gtk_adjustment_get_value(adj);
gtk_adjustment_set_value(adj, scroll_pos + 1);
return app->auto_scroll;
}
int reader_scroll_save(APP* app)
{
GtkTextView* text_view = app->text_view;
int64_t book_index = app->book_index;
char* book_hash = app->book_hash;
GtkAdjustment* vertical_adj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(text_view));
double scroll_pos = gtk_adjustment_get_value(vertical_adj);
GtkTextIter scroll_iter;
gtk_text_view_get_iter_at_location(text_view, &scroll_iter, 0, (gint)scroll_pos);
gint line = gtk_text_iter_get_line(&scroll_iter);
gint line_offset = gtk_text_iter_get_line_offset(&scroll_iter);
if((line != 0) || (line_offset != 0))
{
if(book_index == -1)
reader_books_table_add_new(app, book_hash, &book_index);
reader_books_table_set_int_by_index(app, book_index, "line", line);
reader_books_table_set_int_by_index(app, book_index, "line_offset", line_offset);
app->book_index = book_index;
}
return EXIT_SUCCESS;
}
int reader_scroll_to_line_offset(APP* app, gint line, gint line_offset)
{
GtkTextBuffer* text_buff = app->text_buff;
GtkTextView* text_view = app->text_view;
GtkAdjustment* horisontal_adj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(text_view));
GtkTextIter scroll_iter;
if(gtk_text_buffer_get_line_count(text_buff) >= line)
{
GtkTextIter test_iter;
gtk_text_buffer_get_iter_at_line(text_buff, &test_iter, line);
gtk_text_iter_forward_to_line_end(&test_iter);
if(gtk_text_iter_get_line_offset(&test_iter) >= line_offset)
{
gtk_text_buffer_get_iter_at_line_offset(text_buff, &scroll_iter, line, line_offset);
if(gtk_text_view_scroll_to_iter(text_view, &scroll_iter, 0.0, TRUE, 0.0, 0.0) == FALSE)
{
GtkTextMark* line_mark = gtk_text_buffer_create_mark(text_buff, NULL, &scroll_iter, TRUE);
gtk_text_view_scroll_to_mark(text_view, line_mark, 0.0, TRUE, 0.0, 0.0);
gtk_text_buffer_delete_mark(text_buff, line_mark);
}
gtk_adjustment_set_value(horisontal_adj, 0.0);
}
}
return EXIT_FAILURE;
}
int reader_scroll_restore(APP* app, int line, int line_offset)
{
while(gtk_events_pending())
gtk_main_iteration();
reader_scroll_to_line_offset(app, line, line_offset);
return EXIT_SUCCESS;
}