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adding history feature to manual (duplicates current entry on missing pages)

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This commit is contained in:
Benji Dial 2020-11-08 11:40:36 -05:00
parent 21491514b3
commit e9376ea26d
1 changed files with 37 additions and 2 deletions
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39
src/user/manual/manual.c
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@ -21,6 +21,8 @@
struct file *cur_file = 0;
char *name_backup = 0;
uint32_t *line_offsets = 0;
uint32_t n_lines;
@ -122,6 +124,10 @@ void load_file(const char *name) {
return;
}
if (name_backup)
free_block(name_backup);
name_backup = strdup(name);
if (cur_file)
close_file(cur_file);
cur_file = new_file;
@ -182,6 +188,32 @@ void load_file(const char *name) {
scroll_to(0);
}
struct stack_entry {
struct stack_entry *down;
char *name;
uint32_t line;
};
struct stack_entry *stack_top = 0;
void push() {
struct stack_entry *new_entry = get_block(sizeof(struct stack_entry));
new_entry->down = stack_top;
new_entry->name = strdup(name_backup);
new_entry->line = line_on;
stack_top = new_entry;
}
void pop() {
if (stack_top) {
load_file(stack_top->name);
scroll_to(stack_top->line);
free_block(stack_top->name);
free_block(stack_top);
stack_top = stack_top->down;
}
}
void main() {
_set_color(UI_COLOR);
_print_at(24, 79, " ");
@ -255,11 +287,14 @@ void main() {
case ' ':
case '\n':
case _KEY_NENTER:
if (cur_link)
if (cur_link) {
push();
load_file(cur_link->lto);
}
break;
case _KEY_ESC:
//TODO
if (stack_top)
pop();
break;
case 'q':
return;