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4coder
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4coder/4coder_seek.cpp

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/*
4coder_seek.cpp - Procedures and commands for jumping through code to useful stop boundaries.
*/
// TOP
static i32
seek_line_end(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
i32 still_looping;
char at_pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
still_looping = 1;
do{
for (; pos < stream.end; ++pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
goto double_break;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break:;
if (pos > buffer->size){
pos = buffer->size;
}
}
return(pos);
}
static i32
seek_line_beginning(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
i32 still_looping;
char at_pos;
--pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
still_looping = 1;
do{
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
goto double_break;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break:;
if (pos != 0){
++pos;
}
if (pos < 0){
pos = 0;
}
}
return(pos);
}
static void
move_past_lead_whitespace(Application_Links *app, View_Summary *view, Buffer_Summary *buffer){
refresh_view(app, view);
i32 new_pos = seek_line_beginning(app, buffer, view->cursor.pos);
char space[1024];
Stream_Chunk chunk = {};
i32 still_looping = false;
i32 i = new_pos;
if (init_stream_chunk(&chunk, app, buffer, i, space, sizeof(space))){
do{
for (; i < chunk.end; ++i){
char at_pos = chunk.data[i];
if (at_pos == '\n' || !char_is_whitespace(at_pos)){
goto break2;
}
}
still_looping = forward_stream_chunk(&chunk);
}while(still_looping);
break2:;
if (i > view->cursor.pos){
view_set_cursor(app, view, seek_pos(i), true);
}
}
}
static i32
buffer_seek_whitespace_up(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
char at_pos;
--pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
// Step 1: Find the first non-whitespace character
// behind the current position.
i32 still_looping = 1;
while (still_looping){
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (!char_is_whitespace(at_pos)){
goto double_break_1;
}
}
still_looping = backward_stream_chunk(&stream);
}
double_break_1:;
// Step 2: Continue scanning backward, at each '\n'
// mark the beginning of another line by setting
// no_hard to true, set it back to false if a
// non-whitespace character is discovered before
// the next '\n'
i32 no_hard = false;
while (still_looping){
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
if (no_hard){
goto double_break_2;
}
else{
no_hard = true;
}
}
else if (!char_is_whitespace(at_pos)){
no_hard = false;
}
}
still_looping = backward_stream_chunk(&stream);
}
double_break_2:;
if (pos != 0){
++pos;
}
}
return(pos);
}
static i32
buffer_seek_whitespace_down(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
// step 1: find the first non-whitespace character
// ahead of the current position.
b32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (!char_is_whitespace(at_pos)){
goto double_break_1;
}
}
still_looping = forward_stream_chunk(&stream);
} while(still_looping);
double_break_1:;
// step 2: continue scanning forward, at each '\n'
// mark it as the beginning of a new line by updating
// the prev_endline value. if another '\n' is found
// with non-whitespace then the previous line was
// all whitespace.
b32 no_hard = false;
i32 prev_endline = -1;
while(still_looping){
for (; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (at_pos == '\n'){
if (no_hard){
goto double_break_2;
}
else{
no_hard = true;
prev_endline = pos;
}
}
else if (!char_is_whitespace(at_pos)){
no_hard = false;
}
}
still_looping = forward_stream_chunk(&stream);
}
double_break_2:;
if (prev_endline == -1 || prev_endline+1 >= buffer->size){
pos = buffer->size;
}
else{
pos = prev_endline+1;
}
}
return(pos);
}
static i32
buffer_seek_whitespace_right(Application_Links *app, Buffer_Summary *buffer, i32 pos){
i32 result = buffer->size + 1;
if (pos < 0){
pos = 0;
}
pos += 1;
if (pos < buffer->size){
char data_chunk[1024];
Stream_Chunk stream = {};
stream.add_null = true;
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
b32 is_whitespace_1 = true;
is_whitespace_1 = char_is_whitespace(buffer_get_char(app, buffer, pos - 1));
do{
for (; pos < stream.end; ++pos){
char c2 = stream.data[pos];
b32 is_whitespace_2 = true;
if (c2 != 0){
is_whitespace_2 = char_is_whitespace(c2);
}
if (!is_whitespace_1 && is_whitespace_2){
result = pos;
goto double_break;
}
is_whitespace_1 = is_whitespace_2;
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break:;
}
}
return(result);
}
static i32
buffer_seek_whitespace_left(Application_Links *app, Buffer_Summary *buffer, i32 pos){
i32 result = -1;
if (pos > buffer->size){
pos = buffer->size;
}
pos -= 2;
if (pos >= 0){
char data_chunk[1024];
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
b32 is_whitespace_2 = char_is_whitespace(buffer_get_char(app, buffer, pos + 1));
do{
for (; pos >= stream.start; --pos){
char c1 = stream.data[pos];
b32 is_whitespace_1 = char_is_whitespace(c1);
if (is_whitespace_1 && !is_whitespace_2){
result = pos + 1;
goto double_break;
}
is_whitespace_2 = is_whitespace_1;
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break:;
}
}
if (pos == -1){
if (!char_is_whitespace(buffer_get_char(app, buffer, 0))){
result = 0;
}
}
return(result);
}
static i32
buffer_seek_alphanumeric_right(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char data_chunk[1024];
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (!char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break2;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
return(pos);
}
static i32
buffer_seek_alphanumeric_left(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char data_chunk[1024];
Stream_Chunk stream = {};
--pos;
if (pos > 0){
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (!char_is_alpha_numeric_true_utf8(stream.data[pos])){
++pos;
goto double_break2;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
}
else{
pos = 0;
}
return(pos);
}
static i32
buffer_seek_alphanumeric_or_underscore_right(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char data_chunk[1024];
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (!char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break2;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
return(pos);
}
static i32
buffer_seek_alphanumeric_or_underscore_left(Application_Links *app, Buffer_Summary *buffer, i32 pos){
char data_chunk[1024];
Stream_Chunk stream = {};
--pos;
if (pos > 0){
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
b32 still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (!char_is_alpha_numeric_utf8(stream.data[pos])){
++pos;
goto double_break2;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
}
else{
pos = 0;
}
return(pos);
}
static i32
buffer_seek_range_camel_right(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 an_pos){
char data_chunk[1024];
Stream_Chunk stream = {};
++pos;
if (pos < an_pos){
stream.max_end = an_pos;
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
u8 c = 0, pc = stream.data[pos];
++pos;
b32 still_looping = false;
do{
for (; pos < stream.end; ++pos){
c = stream.data[pos];
if (char_is_upper(c) && char_is_lower_utf8(pc)){
goto double_break1;
}
pc = c;
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
}
}
else{
pos = an_pos;
}
return(pos);
}
static i32
buffer_seek_range_camel_left(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 an_pos){
char data_chunk[1024];
Stream_Chunk stream = {};
--pos;
if (pos > 0){
stream.min_start = an_pos+1;
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
char c = 0, pc = stream.data[pos];
b32 still_looping = false;
do{
for (; pos >= stream.start; --pos){
c = stream.data[pos];
if (char_is_upper(c) && char_is_lower_utf8(pc)){
goto double_break1;
}
pc = c;
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
}
}
else{
pos = 0;
}
return(pos);
}
static i32
buffer_seek_alphanumeric_or_camel_right(Application_Links *app, Buffer_Summary *buffer, i32 pos){
i32 an_pos = buffer_seek_alphanumeric_right(app, buffer, pos);
i32 result = buffer_seek_range_camel_right(app, buffer, pos, an_pos);
return(result);
}
static i32
buffer_seek_alphanumeric_or_camel_left(Application_Links *app, Buffer_Summary *buffer, i32 pos){
i32 an_pos = buffer_seek_alphanumeric_left(app, buffer, pos);
i32 result = buffer_seek_range_camel_left(app, buffer, pos, an_pos);
return(result);
}
static i32
seek_token_left(Cpp_Token_Array *tokens, i32 pos){
i32 result = -1;
i32 token_get_pos = pos - 1;
Cpp_Get_Token_Result get = cpp_get_token(*tokens, token_get_pos);
if (get.token_index >= 0){
result = get.token_start;
}
return(result);
}
static i32
seek_token_right(Cpp_Token_Array *tokens, i32 pos, i32 buffer_end){
i32 result = buffer_end + 1;
Cpp_Get_Token_Result get = cpp_get_token(*tokens, pos);
if (get.in_whitespace_after_token){
get.token_index += 1;
if (get.token_index < tokens->count){
Cpp_Token *token = tokens->tokens + get.token_index;
result = token->start + token->size;
}
}
else{
result = get.token_one_past_last;
}
return(result);
}
static Cpp_Token_Array
buffer_get_all_tokens(Application_Links *app, Partition *part, Buffer_Summary *buffer){
Cpp_Token_Array array = {};
if (buffer->exists && buffer->is_lexed){
array.count = buffer_token_count(app, buffer);
array.max_count = array.count;
array.tokens = push_array(part, Cpp_Token, array.count);
buffer_read_tokens(app, buffer, 0, array.count, array.tokens);
}
return(array);
}
static i32
buffer_boundary_seek(Application_Links *app, Buffer_Summary *buffer, Partition *part, i32 start_pos, b32 seek_forward, Seek_Boundary_Flag flags)/*
DOC_PARAM(buffer, The buffer parameter specifies the buffer through which to seek.)
DOC_PARAM(start_pos, The beginning position of the seek is specified by start_pos measured in absolute position.)
DOC_PARAM(seek_forward, If this parameter is non-zero it indicates that the seek should move foward through the buffer.)
DOC_PARAM(flags, This field specifies the types of boundaries at which the seek should stop.)
DOC_RETURN(This call returns the absolute position where the seek stopped.
If the seek goes below 0 the returned value is -1.
If the seek goes past the end the returned value is the size of the buffer.)
DOC_SEE(Seek_Boundary_Flag)
DOC_SEE(4coder_Buffer_Positioning_System)
*/{
i32 result = 0;
// TODO(allen): reduce duplication?
Temp_Memory temp = begin_temp_memory(part);
if (buffer->exists){
i32 pos[4];
i32 size = buffer->size;
i32 new_pos = 0;
if (start_pos < 0){
start_pos = 0;
}
else if (start_pos > size){
start_pos = size;
}
if (seek_forward){
for (i32 i = 0; i < ArrayCount(pos); ++i){
pos[i] = size + 1;
}
if (flags & BoundaryWhitespace){
pos[0] = buffer_seek_whitespace_right(app, buffer, start_pos);
}
if (flags & BoundaryToken){
if (buffer->tokens_are_ready){
Cpp_Token_Array array = buffer_get_all_tokens(app, part, buffer);
pos[1] = seek_token_right(&array, start_pos, size);
}
else{
pos[1] = buffer_seek_whitespace_right(app, buffer, start_pos);
}
}
if (flags & BoundaryAlphanumeric){
pos[2] = buffer_seek_alphanumeric_right(app, buffer, start_pos);
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_range_camel_right(app, buffer, start_pos, pos[2]);
}
}
else{
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_alphanumeric_or_camel_right(app, buffer, start_pos);
}
}
new_pos = size + 1;
for (i32 i = 0; i < ArrayCount(pos); ++i){
if (new_pos > pos[i]){
new_pos = pos[i];
}
}
}
else{
for (i32 i = 0; i < ArrayCount(pos); ++i){
pos[i] = -1;
}
if (flags & BoundaryWhitespace){
pos[0] = buffer_seek_whitespace_left(app, buffer, start_pos);
}
if (flags & BoundaryToken){
if (buffer->tokens_are_ready){
Cpp_Token_Array array = buffer_get_all_tokens(app, part, buffer);
pos[1] = seek_token_left(&array, start_pos);
}
else{
pos[1] = buffer_seek_whitespace_left(app, buffer, start_pos);
}
}
if (flags & BoundaryAlphanumeric){
pos[2] = buffer_seek_alphanumeric_left(app, buffer, start_pos);
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_range_camel_left(app, buffer, start_pos, pos[2]);
}
}
else{
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_alphanumeric_or_camel_left(app, buffer, start_pos);
}
}
new_pos = -1;
for (i32 i = 0; i < ArrayCount(pos); ++i){
if (new_pos < pos[i]){
new_pos = pos[i];
}
}
}
result = new_pos;
}
end_temp_memory(temp);
return(result);
}
////////////////////////////////
void
buffer_seek_delimiter_forward(Application_Links *app, Buffer_Summary *buffer, i32 pos, char delim, i32 *result){
if (buffer->exists){
char chunk[1024];
i32 size = sizeof(chunk);
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, size)){
i32 still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (at_pos == delim){
*result = pos;
goto finished;
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
*result = buffer->size;
finished:;
}
static void
buffer_seek_delimiter_backward(Application_Links *app, Buffer_Summary *buffer, i32 pos, char delim, i32 *result){
if (buffer->exists){
char chunk[1024];
i32 size = sizeof(chunk);
Stream_Chunk stream = {};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, size)){
i32 still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = stream.data[pos];
if (at_pos == delim){
*result = pos;
goto finished;
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
*result = 0;
finished:;
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_forward(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 end, char *str, i32 size, i32 *result){
char read_buffer[512];
if (buffer->size > end){
*result = buffer->size;
}
else{
*result = end;
}
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = str[0];
read_str.size = size;
char chunk[1024];
Stream_Chunk stream = {};
stream.max_end = end;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, sizeof(chunk))){
i32 still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
if (end == 0){
*result = buffer->size;
}
else{
*result = end;
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_backward(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 min, char *str, i32 size, i32 *result){
char read_buffer[512];
*result = min-1;
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = str[0];
read_str.size = size;
char chunk[1024];
Stream_Chunk stream = {};
stream.min_start = min;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, sizeof(chunk))){
i32 still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = stream.data[pos];
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_insensitive_forward(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 end, char *str, i32 size, i32 *result){
char read_buffer[512];
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
stream.max_end = end;
if (buffer->size > end){
*result = buffer->size;
}
else{
*result = end;
}
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = char_to_upper(str[0]);
read_str.size = size;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
i32 still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = char_to_upper(stream.data[pos]);
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_insensitive_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_insensitive_backward(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 min, char *str, i32 size, i32 *result){
char read_buffer[512];
char chunk[1024];
i32 chunk_size = sizeof(chunk);
Stream_Chunk stream = {};
stream.min_start = min;
*result = min-1;
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = char_to_upper(str[0]);
read_str.size = size;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
i32 still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = char_to_upper(stream.data[pos]);
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_insensitive_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
////////////////////////////////
static void
buffer_seek_string(Application_Links *app, Buffer_Summary *buffer, i32 pos, i32 end, i32 min, char *str, i32 size, i32 *result, Buffer_Seek_String_Flags flags){
switch (flags & 3){
case 0:
{
buffer_seek_string_forward(app, buffer, pos, end, str, size, result);
}break;
case BufferSeekString_Backward:
{
buffer_seek_string_backward(app, buffer, pos, min, str, size, result);
}break;
case BufferSeekString_CaseInsensitive:
{
buffer_seek_string_insensitive_forward(app, buffer, pos, end, str, size, result);
}break;
case BufferSeekString_Backward|BufferSeekString_CaseInsensitive:
{
buffer_seek_string_insensitive_backward(app, buffer, pos, min, str, size, result);
}break;
}
}
////////////////////////////////
static b32
buffer_line_is_blank(Application_Links *app, Buffer_Summary *buffer, i32 line){
Partial_Cursor start = {};
Partial_Cursor end = {};
b32 result = false;
if (line <= buffer->line_count){
buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &start);
buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &end);
static const i32 chunk_size = 1024;
char chunk[chunk_size];
Stream_Chunk stream = {};
i32 i = start.pos;
stream.max_end = end.pos;
result = true;
if (init_stream_chunk(&stream, app, buffer, i, chunk, chunk_size)){
b32 still_looping = false;
do{
for (;i < stream.end; ++i){
char c = stream.data[i];
if (!char_is_whitespace(c)){
result = false;
goto double_break;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
}
double_break:;
}
return(result);
}
static String
read_identifier_at_pos(Application_Links *app, Buffer_Summary *buffer, i32 pos, char *space, i32 max, Range *range_out){
String query = {};
i32 start = buffer_seek_alphanumeric_or_underscore_left(app, buffer, pos);
i32 end = buffer_seek_alphanumeric_or_underscore_right(app, buffer, start);
if (!(start <= pos && pos < end)){
end = buffer_seek_alphanumeric_or_underscore_right(app, buffer, pos);
start = buffer_seek_alphanumeric_or_underscore_left(app, buffer, end);
}
if (start <= pos && pos < end){
i32 size = end - start;
if (size <= max){
if (range_out != 0){
*range_out = make_range(start, end);
}
buffer_read_range(app, buffer, start, end, space);
query = make_string_cap(space, size, max);
}
}
return(query);
}
////////////////////////////////
static i32
flip_dir(i32 dir){
if (dir == DirLeft){
dir = DirRight;
}
else{
dir = DirLeft;
}
return(dir);
}
static i32
buffer_boundary_seek(Application_Links *app, Buffer_Summary *buffer, i32 start_pos, i32 dir, Seek_Boundary_Flag flags){
b32 forward = (dir != DirLeft);
return(buffer_boundary_seek(app, buffer, &global_part, start_pos, forward, flags));
}
static void
view_buffer_boundary_seek_set_pos(Application_Links *app, View_Summary *view, Buffer_Summary *buffer, i32 dir, u32 flags){
i32 pos = buffer_boundary_seek(app, buffer, &global_part, view->cursor.pos, dir, flags);
view_set_cursor(app, view, seek_pos(pos), true);
no_mark_snap_to_cursor_if_shift(app, view->view_id);
}
static void
view_boundary_seek_set_pos(Application_Links *app, View_Summary *view, i32 dir, u32 flags){
Buffer_Summary buffer = get_buffer(app, view->buffer_id, AccessProtected);
view_buffer_boundary_seek_set_pos(app, view, &buffer, dir, flags);
}
static void
current_view_boundary_seek_set_pos(Application_Links *app, i32 dir, u32 flags){
View_Summary view = get_active_view(app, AccessProtected);
view_boundary_seek_set_pos(app, &view, dir, flags);
}
static Range
view_buffer_boundary_range(Application_Links *app, View_Summary *view, Buffer_Summary *buffer, i32 dir, u32 flags){
i32 pos1 = view->cursor.pos;
i32 pos2 = buffer_boundary_seek(app, buffer, pos1, dir, flags);
return(make_range(pos1, pos2));
}
static Range
view_buffer_snipe_range(Application_Links *app, View_Summary *view, Buffer_Summary *buffer, i32 dir, u32 flags){
Range result = {};
i32 pos0 = view->cursor.pos;
i32 pos1 = buffer_boundary_seek(app, buffer, pos0, dir, flags);
if (0 <= pos1 && pos1 <= buffer->size){
i32 pos2 = buffer_boundary_seek(app, buffer, pos1, flip_dir(dir), flags);
if (0 <= pos2 && pos2 <= buffer->size){
if (dir == DirLeft){
if (pos2 < pos0){
pos2 = pos0;
}
}
else{
if (pos2 > pos0){
pos2 = pos0;
}
}
result = make_range(pos1, pos2);
}
}
return(result);
}
static void
current_view_boundary_delete(Application_Links *app, i32 dir, u32 flags){
View_Summary view = get_active_view(app, AccessOpen);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessOpen);
if (buffer.exists){
Range range = view_buffer_boundary_range(app, &view, &buffer, dir, flags);
buffer_replace_range(app, &buffer, range.min, range.max, 0, 0);
}
}
static void
current_view_snipe_delete(Application_Links *app, i32 dir, u32 flags){
View_Summary view = get_active_view(app, AccessOpen);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessOpen);
if (buffer.exists){
Range range = view_buffer_snipe_range(app, &view, &buffer, dir, flags);
buffer_replace_range(app, &buffer, range.min, range.max, 0, 0);
}
}
////////////////////////////////
CUSTOM_COMMAND_SIG(seek_whitespace_up)
CUSTOM_DOC("Seeks the cursor up to the next blank line.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = buffer_seek_whitespace_up(app, &buffer, view.cursor.pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_whitespace_down)
CUSTOM_DOC("Seeks the cursor down to the next blank line.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = buffer_seek_whitespace_down(app, &buffer, view.cursor.pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_beginning_of_textual_line)
CUSTOM_DOC("Seeks the cursor to the beginning of the line across all text.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = seek_line_beginning(app, &buffer, view.cursor.pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_end_of_textual_line)
CUSTOM_DOC("Seeks the cursor to the end of the line across all text.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = seek_line_end(app, &buffer, view.cursor.pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_beginning_of_line)
CUSTOM_DOC("Seeks the cursor to the beginning of the visual line.")
{
View_Summary view = get_active_view(app, AccessProtected);
float y = view.cursor.wrapped_y;
if (view.unwrapped_lines){
y = view.cursor.unwrapped_y;
}
view_set_cursor(app, &view, seek_xy(0, y, 1, view.unwrapped_lines), 1);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_end_of_line)
CUSTOM_DOC("Seeks the cursor to the end of the visual line.")
{
View_Summary view = get_active_view(app, AccessProtected);
float y = view.cursor.wrapped_y;
if (view.unwrapped_lines){
y = view.cursor.unwrapped_y;
}
view_set_cursor(app, &view, seek_xy(max_f32, y, 1, view.unwrapped_lines), 1);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_whitespace_up_end_line)
CUSTOM_DOC("Seeks the cursor up to the next blank line and places it at the end of the line.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = buffer_seek_whitespace_up(app, &buffer, view.cursor.pos);
new_pos = seek_line_end(app, &buffer, new_pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(seek_whitespace_down_end_line)
CUSTOM_DOC("Seeks the cursor down to the next blank line and places it at the end of the line.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
i32 new_pos = buffer_seek_whitespace_down(app, &buffer, view.cursor.pos);
new_pos = seek_line_end(app, &buffer, new_pos);
view_set_cursor(app, &view, seek_pos(new_pos), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(goto_beginning_of_file)
CUSTOM_DOC("Sets the cursor to the beginning of the file.")
{
View_Summary view = get_active_view(app, AccessProtected);
view_set_cursor(app, &view, seek_pos(0), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
CUSTOM_COMMAND_SIG(goto_end_of_file)
CUSTOM_DOC("Sets the cursor to the end of the file.")
{
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
view_set_cursor(app, &view, seek_pos(buffer.size), true);
no_mark_snap_to_cursor_if_shift(app, view.view_id);
}
////////////////////////////////
CUSTOM_COMMAND_SIG(seek_whitespace_right)
CUSTOM_DOC("Seek right for the next boundary between whitespace and non-whitespace.")
{
current_view_boundary_seek_set_pos(app, DirRight, BoundaryWhitespace);
}
CUSTOM_COMMAND_SIG(seek_whitespace_left)
CUSTOM_DOC("Seek left for the next boundary between whitespace and non-whitespace.")
{
current_view_boundary_seek_set_pos(app, DirLeft, BoundaryWhitespace);
}
CUSTOM_COMMAND_SIG(seek_token_right)
CUSTOM_DOC("Seek right for the next end of a token.")
{
current_view_boundary_seek_set_pos(app, DirRight, BoundaryToken);
}
CUSTOM_COMMAND_SIG(seek_token_left)
CUSTOM_DOC("Seek left for the next beginning of a token.")
{
current_view_boundary_seek_set_pos(app, DirLeft, BoundaryToken);
}
CUSTOM_COMMAND_SIG(seek_white_or_token_right)
CUSTOM_DOC("Seek right for the next end of a token or boundary between whitespace and non-whitespace.")
{
current_view_boundary_seek_set_pos(app, DirRight, BoundaryToken|BoundaryWhitespace);
}
CUSTOM_COMMAND_SIG(seek_white_or_token_left)
CUSTOM_DOC("Seek left for the next end of a token or boundary between whitespace and non-whitespace.")
{
current_view_boundary_seek_set_pos(app, DirLeft, BoundaryToken|BoundaryWhitespace);
}
CUSTOM_COMMAND_SIG(seek_alphanumeric_right)
CUSTOM_DOC("Seek right for boundary between alphanumeric characters and non-alphanumeric characters.")
{
current_view_boundary_seek_set_pos(app, DirRight, BoundaryAlphanumeric);
}
CUSTOM_COMMAND_SIG(seek_alphanumeric_left)
CUSTOM_DOC("Seek left for boundary between alphanumeric characters and non-alphanumeric characters.")
{
current_view_boundary_seek_set_pos(app, DirLeft, BoundaryAlphanumeric);
}
CUSTOM_COMMAND_SIG(seek_alphanumeric_or_camel_right)
CUSTOM_DOC("Seek right for boundary between alphanumeric characters or camel case word and non-alphanumeric characters.")
{
current_view_boundary_seek_set_pos(app, DirRight, BoundaryAlphanumeric|BoundaryCamelCase);
}
CUSTOM_COMMAND_SIG(seek_alphanumeric_or_camel_left)
CUSTOM_DOC("Seek left for boundary between alphanumeric characters or camel case word and non-alphanumeric characters.")
{
current_view_boundary_seek_set_pos(app, DirLeft, BoundaryAlphanumeric|BoundaryCamelCase);
}
////////////////////////////////
CUSTOM_COMMAND_SIG(backspace_word)
CUSTOM_DOC("Delete characters between the cursor position and the first alphanumeric boundary to the left.")
{
current_view_boundary_delete(app, DirLeft, BoundaryAlphanumeric);
}
CUSTOM_COMMAND_SIG(delete_word)
CUSTOM_DOC("Delete characters between the cursor position and the first alphanumeric boundary to the right.")
{
current_view_boundary_delete(app, DirRight, BoundaryAlphanumeric);
}
CUSTOM_COMMAND_SIG(snipe_token_or_word)
CUSTOM_DOC("Delete a single, whole token on or to the left of the cursor and post it to the clipboard.")
{
current_view_snipe_delete(app, DirLeft, BoundaryToken|BoundaryWhitespace);
}
CUSTOM_COMMAND_SIG(snipe_token_or_word_right)
CUSTOM_DOC("Delete a single, whole token on or to the right of the cursor and post it to the clipboard.")
{
current_view_snipe_delete(app, DirRight, BoundaryToken|BoundaryWhitespace);
}
// BOTTOM
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