4coder/4coder_helper.h

473 lines
13 KiB
C

/*
* Bind helper struct and functions
*/
#ifndef FCODER_HELPER_H
#define FCODER_HELPER_H
struct Bind_Helper{
Binding_Unit *cursor, *start, *end;
Binding_Unit *header, *group;
int write_total;
int error;
};
#define BH_ERR_NONE 0
#define BH_ERR_MISSING_END 1
#define BH_ERR_MISSING_BEGIN 2
#define BH_ERR_OUT_OF_MEMORY 3
inline void
copy(char *dest, const char *src, int len){
for (int i = 0; i < len; ++i){
*dest++ = *src++;
}
}
inline Binding_Unit*
write_unit(Bind_Helper *helper, Binding_Unit unit){
Binding_Unit *p = 0;
helper->write_total += sizeof(*p);
if (helper->error == 0 && helper->cursor != helper->end){
p = helper->cursor++;
*p = unit;
}
return p;
}
inline char*
write_inline_string(Bind_Helper *helper, char *value, int len){
char *dest = 0;
helper->write_total += len;
if (helper->error == 0){
dest = (char*)helper->cursor;
int cursor_advance = len + sizeof(*helper->cursor) - 1;
cursor_advance /= sizeof(*helper->cursor);
cursor_advance *= sizeof(*helper->cursor);
helper->cursor += cursor_advance;
if (helper->cursor < helper->end){
copy(dest, value, len);
}
else{
helper->error = BH_ERR_OUT_OF_MEMORY;
}
}
return dest;
}
inline Bind_Helper
begin_bind_helper(void *data, int size){
Bind_Helper result;
result.header = 0;
result.group = 0;
result.write_total = 0;
result.error = 0;
result.cursor = (Binding_Unit*)data;
result.start = result.cursor;
result.end = result.start + size / sizeof(*result.cursor);
Binding_Unit unit;
unit.type = unit_header;
unit.header.total_size = sizeof(*result.header);
result.header = write_unit(&result, unit);
result.header->header.user_map_count = 0;
return result;
}
inline void
begin_map_(Bind_Helper *helper, int mapid, int replace){
if (helper->group != 0 && helper->error == 0) helper->error = BH_ERR_MISSING_END;
if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
Binding_Unit unit;
unit.type = unit_map_begin;
unit.map_begin.mapid = mapid;
unit.map_begin.replace = replace;
helper->group = write_unit(helper, unit);
helper->group->map_begin.bind_count = 0;
}
inline void
begin_map(Bind_Helper *helper, int mapid){
begin_map_(helper, mapid, 0);
}
inline void
restart_map(Bind_Helper *helper, int mapid){
begin_map_(helper, mapid, 1);
}
inline void
end_map(Bind_Helper *helper){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
helper->group = 0;
}
inline void
bind(Bind_Helper *helper, short code, unsigned char modifiers, int cmdid){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error) ++helper->group->map_begin.bind_count;
Binding_Unit unit;
unit.type = unit_binding;
unit.binding.command_id = cmdid;
unit.binding.code = code;
unit.binding.modifiers = modifiers;
write_unit(helper, unit);
}
inline void
bind(Bind_Helper *helper, short code, unsigned char modifiers, Custom_Command_Function *func){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error) ++helper->group->map_begin.bind_count;
Binding_Unit unit;
unit.type = unit_callback;
unit.callback.func = func;
unit.callback.code = code;
unit.callback.modifiers = modifiers;
write_unit(helper, unit);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, int cmdid){
bind(helper, 0, 0, cmdid);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, Custom_Command_Function *func){
bind(helper, 0, 0, func);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, int cmdid){
bind(helper, 0, modifiers, cmdid);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, Custom_Command_Function *func){
bind(helper, 0, modifiers, func);
}
inline void
inherit_map(Bind_Helper *helper, int mapid){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
Binding_Unit unit;
unit.type = unit_inherit;
unit.map_inherit.mapid = mapid;
write_unit(helper, unit);
}
inline void
set_hook(Bind_Helper *helper, int hook_id, Hook_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = hook_id;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline void
set_open_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = _hook_open_file;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline void
set_new_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = _hook_new_file;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline void
set_command_caller(Bind_Helper *helper, Command_Caller_Hook_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = _hook_command_caller;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline void
set_input_filter(Bind_Helper *helper, Input_Filter_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = _hook_input_filter;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline void
set_scroll_rule(Bind_Helper *helper, Scroll_Rule_Function *func){
Binding_Unit unit;
unit.type = unit_hook;
unit.hook.hook_id = _hook_scroll_rule;
unit.hook.func = (void*) func;
write_unit(helper, unit);
}
inline int
end_bind_helper(Bind_Helper *helper){
int result;
if (helper->header){
helper->header->header.total_size = (int)(helper->cursor - helper->start);
helper->header->header.error = helper->error;
}
result = helper->write_total;
return(result);
}
inline Range
get_range(View_Summary *view){
Range range;
range = make_range(view->cursor.pos, view->mark.pos);
return(range);
}
struct Buffer_Rect{
int char0,line0;
int char1,line1;
};
#ifndef Swap
#define Swap(T,a,b) do{ T t = a; a = b; b = t; } while(0)
#endif
inline Buffer_Rect
get_rect(View_Summary *view){
Buffer_Rect rect;
rect.char0 = view->mark.character;
rect.line0 = view->mark.line;
rect.char1 = view->cursor.character;
rect.line1 = view->cursor.line;
if (rect.line0 > rect.line1){
Swap(int, rect.line0, rect.line1);
}
if (rect.char0 > rect.char1){
Swap(int, rect.char0, rect.char1);
}
return(rect);
}
inline void
exec_command(Application_Links *app, Command_ID id){
app->exec_command(app, id);
}
inline void
exec_command(Application_Links *app, Custom_Command_Function *func){
func(app);
}
inline void
exec_command(Application_Links *app, Generic_Command cmd){
if (cmd.cmdid < cmdid_count){
exec_command(app, cmd.cmdid);
}
else{
exec_command(app, cmd.command);
}
}
inline void
active_view_to_line(Application_Links *app, unsigned int access, int line_number){
View_Summary view;
view = app->get_active_view(app, access);
// NOTE(allen|a3.4.4): We don't have to worry about whether this is a valid line number.
// When it's not possible to place a cursor at the position for whatever reason it will set the
// cursor to a nearby valid position.
app->view_set_cursor(app, &view, seek_line_char(line_number, 0), 1);
}
inline View_Summary
get_first_view_with_buffer(Application_Links *app, int buffer_id){
View_Summary result = {};
View_Summary test = {};
if (buffer_id != 0){
unsigned int access = AccessAll;
for(test = app->get_view_first(app, access);
test.exists;
app->get_view_next(app, &test, access)){
Buffer_Summary buffer = app->get_buffer(app, test.buffer_id, access);
if(buffer.buffer_id == buffer_id){
result = test;
break;
}
}
}
return(result);
}
inline int
key_is_unmodified(Key_Event_Data *key){
char *mods = key->modifiers;
int unmodified = !mods[MDFR_CONTROL_INDEX] && !mods[MDFR_ALT_INDEX];
return(unmodified);
}
static int
query_user_general(Application_Links *app, Query_Bar *bar, int force_number){
User_Input in;
int success = 1;
int good_character = 0;
// NOTE(allen|a3.4.4): It will not cause an *error* if we continue on after failing to.
// start a query bar, but it will be unusual behavior from the point of view of the
// user, if this command starts intercepting input even though no prompt is shown.
// This will only happen if you have a lot of bars open already or if the current view
// doesn't support query bars.
if (app->start_query_bar(app, bar, 0) == 0) return 0;
while (1){
// NOTE(allen|a3.4.4): This call will block until the user does one of the input
// types specified in the flags. The first set of flags are inputs you'd like to intercept
// that you don't want to abort on. The second set are inputs that you'd like to cause
// the command to abort. If an event satisfies both flags, it is treated as an abort.
in = app->get_user_input(app, EventOnAnyKey, EventOnEsc | EventOnButton);
// NOTE(allen|a3.4.4): The responsible thing to do on abort is to end the command
// without waiting on get_user_input again.
if (in.abort){
success = 0;
break;
}
good_character = 0;
if (key_is_unmodified(&in.key)){
if (force_number){
if (in.key.character >= '0' && in.key.character <= '9'){
good_character = 1;
}
}
else{
if (in.key.character != 0){
good_character = 1;
}
}
}
// NOTE(allen|a3.4.4): All we have to do to update the query bar is edit our
// local Query_Bar struct! This is handy because it means our Query_Bar
// is always correct for typical use without extra work updating the bar.
if (in.type == UserInputKey){
if (in.key.keycode == '\n' || in.key.keycode == '\t'){
break;
}
else if (in.key.keycode == key_back){
if (bar->string.size > 0){
--bar->string.size;
}
}
else if (good_character){
append(&bar->string, in.key.character);
}
}
}
return(success);
}
inline int
query_user_string(Application_Links *app, Query_Bar *bar){
int success = query_user_general(app, bar, 0);
return(success);
}
inline int
query_user_number(Application_Links *app, Query_Bar *bar){
int success = query_user_general(app, bar, 1);
return(success);
}
inline String empty_string() {String Result = {}; return(Result);}
inline Buffer_Summary
get_active_buffer(Application_Links *app, unsigned int access){
View_Summary view = app->get_active_view(app, access);
Buffer_Summary buffer = app->get_buffer(app, view.buffer_id, access);
return(buffer);
}
inline char
buffer_get_char(Application_Links *app, Buffer_Summary *buffer, int pos){
char result = 0;
app->buffer_read_range(app, buffer, pos, pos+1, &result);
return(result);
}
inline Buffer_Identifier
buffer_identifier(char *str, int len){
Buffer_Identifier identifier;
identifier.name = str;
identifier.name_len = len;
identifier.id = 0;
return(identifier);
}
inline Buffer_Identifier
buffer_identifier(int id){
Buffer_Identifier identifier;
identifier.name = 0;
identifier.name_len = 0;
identifier.id = id;
return(identifier);
}
static int
view_open_file(Application_Links *app, View_Summary *view,
char *filename, int filename_len, int do_in_background){
int result = false;
Buffer_Summary buffer = app->get_buffer_by_name(app, filename, filename_len, AccessProtected|AccessHidden);
if (buffer.exists){
if (!do_in_background){
if (view){
app->view_set_buffer(app, view, buffer.buffer_id, 0);
}
}
result = true;
}
else{
buffer = app->create_buffer(app, filename, filename_len, do_in_background);
if (!do_in_background){
if (buffer.exists){
if (view){
app->view_set_buffer(app, view, buffer.buffer_id, 0);
result = true;
}
}
}
}
return(result);
}
#endif