4coder/4coder_helper/4coder_helper.h

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/*
* Miscellaneous helpers for common operations.
*/
#if !defined(FCODER_HELPER_H)
#define FCODER_HELPER_H
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#define dll_remove(n) (n)->next->prev=(n)->prev,(n)->prev->next=(n)->next
#define zdll_push_back_(f,l,n) if(f==0){n->next=n->prev=0;f=l=n;}else{n->prev=l;n->next=0;l->next=n;l=n;}
#define zdll_push_back(f,l,n) do{ zdll_push_back_((f),(l),(n)) }while(0)
#define zdll_remove_front_(f,l,n) if(f==l){f=l=0;}else{f=f->next;f->prev=0;}
#define zdll_remove_back_(f,l,n) if(f==l){f=l=0;}else{l=l->prev;l->next=0;}
#define zdll_remove_(f,l,n) if(f==n){zdll_remove_front_(f,l,n);}else if(l==n){zdll_remove_back_(f,l,n);}else{dll_remove(n);}
#define zdll_remove(f,l,n) do{ zdll_remove_((f),(l),(n)) }while(0)
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#if !defined(Member)
# define Member(S,m) (((S*)0)->m)
#endif
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#define PtrDif(a,b) ((uint8_t*)(a) - (uint8_t*)(b))
#define PtrAsInt(a) PtrDif(a,0)
#define OffsetOfMember(S,m) PtrAsInt(&Member(S,m))
#define CastFromMember(S,m,ptr) (S*)( (uint8_t*)(ptr) - OffsetOfMember(S,m) )
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#if !defined(max_f32)
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inline float
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max_f32_proc(void){
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union{
uint32_t x;
float f;
} c;
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c.x = 0x7f800000;
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return(c.f);
}
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#define max_f32 max_f32_proc()
#endif
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#include "4coder_seek_types.h"
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#include "4coder_lib/4coder_utf8.h"
static void
exec_command(Application_Links *app, Custom_Command_Function *func){
func(app);
}
static 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);
}
}
static int32_t
key_is_unmodified(Key_Event_Data *key){
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int8_t *mods = key->modifiers;
int32_t unmodified = (!mods[MDFR_CONTROL_INDEX] && !mods[MDFR_ALT_INDEX]);
return(unmodified);
}
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static uint32_t
to_writable_character(User_Input in, uint8_t *character){
uint32_t result = 0;
if (in.type == UserInputKey){
if (in.key.character != 0){
u32_to_utf8_unchecked(in.key.character, character, &result);
}
}
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return(result);
}
static uint32_t
to_writable_character(Key_Event_Data key, uint8_t *character){
uint32_t result = 0;
if (key.character != 0){
u32_to_utf8_unchecked(key.character, character, &result);
}
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return(result);
}
static bool32
backspace_utf8(String *str){
bool32 result = false;
uint8_t *s = (uint8_t*)str->str;
if (str->size > 0){
uint32_t i = str->size-1;
for (; i > 0; --i){
if (s[i] <= 0x7F || s[i] >= 0xC0){
break;
}
}
str->size = i;
result = true;
}
return(result);
}
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static bool32
query_user_general(Application_Links *app, Query_Bar *bar, bool32 force_number){
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bool32 success = true;
// 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 (start_query_bar(app, bar, 0) == 0) return 0;
for (;;){
// 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.
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User_Input in = 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){
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success = false;
break;
}
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uint8_t character[4];
uint32_t length = 0;
bool32 good_character = false;
if (key_is_unmodified(&in.key)){
if (force_number){
if (in.key.character >= '0' && in.key.character <= '9'){
good_character = true;
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length = to_writable_character(in, character);
}
}
else{
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length = to_writable_character(in, character);
if (length != 0){
good_character = true;
}
}
}
// 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){
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backspace_utf8(&bar->string);
}
else if (good_character){
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append_ss(&bar->string, make_string(character, length));
}
}
}
terminate_with_null(&bar->string);
return(success);
}
static int32_t
query_user_string(Application_Links *app, Query_Bar *bar){
int32_t success = query_user_general(app, bar, false);
return(success);
}
static int32_t
query_user_number(Application_Links *app, Query_Bar *bar){
int32_t success = query_user_general(app, bar, true);
return(success);
}
static void
init_theme_zero(Theme *theme){
for (int32_t i = 0; i < Stag_COUNT; ++i){
theme->colors[i] = 0;
}
}
static char
buffer_get_char(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char result = ' ';
*buffer = get_buffer(app, buffer->buffer_id, AccessAll);
if (pos < buffer->size){
buffer_read_range(app, buffer, pos, pos+1, &result);
}
return(result);
}
static Buffer_Identifier
buffer_identifier(char *str, int32_t len){
Buffer_Identifier identifier;
identifier.name = str;
identifier.name_len = len;
identifier.id = 0;
return(identifier);
}
static Buffer_Identifier
buffer_identifier(Buffer_ID id){
Buffer_Identifier identifier;
identifier.name = 0;
identifier.name_len = 0;
identifier.id = id;
return(identifier);
}
static Range
make_range(int32_t p1, int32_t p2){
Range range;
if (p1 < p2){
range.min = p1;
range.max = p2;
}
else{
range.min = p2;
range.max = p1;
}
return(range);
}
static void
adjust_all_buffer_wrap_widths(Application_Links *app, int32_t wrap_width, int32_t min_base_width){
for (Buffer_Summary buffer = get_buffer_first(app, AccessAll);
buffer.exists;
get_buffer_next(app, &buffer, AccessAll)){
buffer_set_setting(app, &buffer, BufferSetting_WrapPosition, wrap_width);
buffer_set_setting(app, &buffer, BufferSetting_MinimumBaseWrapPosition, min_base_width);
}
}
// TODO(allen): Setup buffer seeking to do character_pos and get View_Summary out of this parameter list.
static int32_t
character_pos_to_pos(Application_Links *app, View_Summary *view, Buffer_Summary *buffer, int32_t character_pos){
int32_t result = 0;
Full_Cursor cursor = {0};
if (view_compute_cursor(app, view, seek_character_pos(character_pos), &cursor)){
result = cursor.pos;
}
return(result);
}
struct Buffer_Rect{
int32_t char0, line0;
int32_t char1, line1;
};
#ifndef Swap
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# define Swap(T,a,b) do{ T t = a; a = b; b = t; } while(0)
#endif
static Buffer_Rect
get_rect(View_Summary *view){
Buffer_Rect rect = {0};
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(int32_t, rect.line0, rect.line1);
}
if (rect.char0 > rect.char1){
Swap(int32_t, rect.char0, rect.char1);
}
return(rect);
}
static i32_Rect
get_line_x_rect(View_Summary *view){
i32_Rect rect = {0};
if (view->unwrapped_lines){
rect.x0 = (int32_t)view->mark.unwrapped_x;
rect.x1 = (int32_t)view->cursor.unwrapped_x;
}
else{
rect.x0 = (int32_t)view->mark.wrapped_x;
rect.x1 = (int32_t)view->cursor.wrapped_x;
}
rect.y0 = view->mark.line;
rect.y1 = view->cursor.line;
if (rect.y0 > rect.y1){
Swap(int32_t, rect.y0, rect.y1);
}
if (rect.x0 > rect.x1){
Swap(int32_t, rect.x0, rect.x1);
}
return(rect);
}
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static View_Summary
get_first_view_with_buffer(Application_Links *app, int32_t buffer_id){
View_Summary result = {0};
View_Summary test = {0};
if (buffer_id != 0){
uint32_t access = AccessAll;
for(test = get_view_first(app, access);
test.exists;
get_view_next(app, &test, access)){
Buffer_Summary buffer = get_buffer(app, test.buffer_id, access);
if(buffer.buffer_id == buffer_id){
result = test;
break;
}
}
}
return(result);
}
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static bool32
open_file(Application_Links *app, Buffer_Summary *buffer_out, char *filename, int32_t filename_len, bool32 background, bool32 never_new){
bool32 result = false;
Buffer_Summary buffer = get_buffer_by_name(app, filename, filename_len, AccessProtected|AccessHidden);
if (buffer.exists){
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if (buffer_out){
*buffer_out = buffer;
}
result = true;
}
else{
Buffer_Create_Flag flags = 0;
if (background){
flags |= BufferCreate_Background;
}
if (never_new){
flags |= BufferCreate_NeverNew;
}
buffer = create_buffer(app, filename, filename_len, flags);
if (buffer.exists){
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if (buffer_out){
*buffer_out = buffer;
}
result = true;
}
}
return(result);
}
static Buffer_ID
buffer_identifier_to_id(Application_Links *app, Buffer_Identifier identifier){
Buffer_ID id = 0;
if (identifier.id != 0){
id = identifier.id;
}
else{
Buffer_Summary buffer = get_buffer_by_name(app, identifier.name, identifier.name_len, AccessAll);
id = buffer.buffer_id;
if (id == 0){
buffer = get_buffer_by_file_name(app, identifier.name, identifier.name_len, AccessAll);
id = buffer.buffer_id;
}
}
return(id);
}
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static bool32
view_open_file(Application_Links *app, View_Summary *view, char *filename, int32_t filename_len, bool32 never_new){
bool32 result = false;
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if (view != 0){
Buffer_Summary buffer = {0};
if (open_file(app, &buffer, filename, filename_len, false, never_new)){
view_set_buffer(app, view, buffer.buffer_id, 0);
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result = true;
}
}
return(result);
}
static void
get_view_prev(Application_Links *app, View_Summary *view, uint32_t access){
if (view->exists){
View_ID original_id = view->view_id;
View_ID check_id = original_id;
View_Summary new_view = {0};
for (;;){
--check_id;
if (check_id <= 0){
check_id = 16;
}
if (check_id == original_id){
new_view = *view;
break;
}
new_view = get_view(app, check_id, access);
if (new_view.exists){
break;
}
}
*view = new_view;
}
}
static View_Summary
get_view_last(Application_Links *app, uint32_t access){
View_Summary view = {0};
view.exists = true;
get_view_prev(app, &view, access);
if (view.view_id < 1 || view.view_id > 16){
view = null_view_summary;
}
return(view);
}
static void
get_view_next_looped(Application_Links *app, View_Summary *view, uint32_t access){
get_view_next(app, view, access);
if (!view->exists){
*view = get_view_first(app, access);
}
}
static void
get_view_prev_looped(Application_Links *app, View_Summary *view, uint32_t access){
get_view_prev(app, view, access);
if (!view->exists){
*view = get_view_last(app, access);
}
}
static void
refresh_buffer(Application_Links *app, Buffer_Summary *buffer){
*buffer = get_buffer(app, buffer->buffer_id, AccessAll);
}
static void
refresh_view(Application_Links *app, View_Summary *view){
*view = get_view(app, view->view_id, AccessAll);
}
static float
get_view_y(View_Summary *view){
float y = view->cursor.wrapped_y;
if (view->unwrapped_lines){
y = view->cursor.unwrapped_y;
}
return(y);
}
static float
get_view_x(View_Summary *view){
float x = view->cursor.wrapped_x;
if (view->unwrapped_lines){
x = view->cursor.unwrapped_x;
}
return(x);
}
static Range
get_range(View_Summary *view){
Range range = make_range(view->cursor.pos, view->mark.pos);
return(range);
}
#if !defined(ArrayCount)
# define ArrayCount(a) (sizeof(a)/sizeof(a[0]))
#endif
#endif