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4coder/4coder_search.cpp

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/*
4coder_search.cpp - Commands that search accross buffers including word complete,
and list all locations.
TYPE: 'drop-in-command-pack'
*/
// TOP
#if !defined(FCODER_SEARCH)
#define FCODER_SEARCH
#include "4coder_search.h"
#include "4coder_lib/4coder_table.h"
#include "4coder_lib/4coder_mem.h"
#include "4coder_helper/4coder_streaming.h"
#include "4coder_helper/4coder_long_seek.h"
#include "4coder_default_framework.h"
//
// Search Iteration Systems
//
static void
search_key_alloc(General_Memory *general, Search_Key *key, int32_t *size, int32_t count){
if (count > ArrayCount(key->words)){
count = ArrayCount(key->words);
}
int32_t min_size = 0x7FFFFFFF;
int32_t total_size = 0;
for (int32_t i = 0; i < count; ++i){
total_size += size[i];
if (min_size > size[i]){
min_size = size[i];
}
}
int32_t max_base_size = total_size*2;
if (key->base == 0){
key->base = (char*)general_memory_allocate(general, max_base_size);
key->base_size = max_base_size;
}
else if (key->base_size < total_size){
key->base = (char*)general_memory_reallocate_nocopy(general, key->base, max_base_size);
key->base_size = max_base_size;
}
char *char_ptr = key->base;
for (int32_t i = 0; i < count; ++i){
key->words[i].str = char_ptr;
key->words[i].size = 0;
key->words[i].memory_size = size[i];
char_ptr += size[i];
}
key->count = count;
key->min_size = min_size;
}
static void
search_iter_init(Search_Iter *iter, Search_Key key){
iter->key = key;
iter->i = 0;
iter->range_initialized = 0;
}
static void
search_set_init(General_Memory *general, Search_Set *set, int32_t range_count){
int32_t max = range_count*2;
if (set->ranges == 0){
set->ranges = (Search_Range*)general_memory_allocate(general, sizeof(Search_Range)*max);
set->max = max;
}
else if (set->max < range_count){
set->ranges = (Search_Range*)general_memory_reallocate_nocopy(
general, set->ranges, sizeof(Search_Range)*max);
set->max = max;
}
set->count = range_count;
}
static void
search_hits_table_alloc(General_Memory *general, Table *hits, int32_t table_size){
void *mem = 0;
int32_t mem_size = table_required_mem_size(table_size, sizeof(Offset_String));
if (hits->hash_array == 0){
mem = general_memory_allocate(general, mem_size);
}
else{
mem = general_memory_reallocate_nocopy(general, hits->hash_array, mem_size);
}
table_init_memory(hits, mem, table_size, sizeof(Offset_String));
}
static void
search_hits_init(General_Memory *general, Table *hits, String_Space *str, int32_t table_size, int32_t str_size){
if (hits->hash_array == 0){
search_hits_table_alloc(general, hits, table_size);
}
else{
int32_t mem_size = table_required_mem_size(table_size, sizeof(Offset_String));
void *mem = general_memory_reallocate_nocopy(general, hits->hash_array, mem_size);
table_init_memory(hits, mem, table_size, sizeof(Offset_String));
}
if (str->space == 0){
str->space = (char*)general_memory_allocate(general, str_size);
str->max = str_size;
}
else if (str->max < str_size){
str->space = (char*)general_memory_reallocate_nocopy(general, str->space, str_size);
str->max = str_size;
}
str->pos = str->new_pos = 0;
table_clear(hits);
}
//
// Table Operations
//
static int32_t
search_hit_add(General_Memory *general, Table *hits, String_Space *space, char *str, int32_t len){
int32_t result = false;
Assert(len != 0);
Offset_String ostring = strspace_append(space, str, len);
if (ostring.size == 0){
int32_t new_size = space->max*2;
if (new_size < space->max + len){
new_size = space->max + len;
}
space->space = (char*)general_memory_reallocate(general, space->space, space->new_pos, new_size);
ostring = strspace_append(space, str, len);
}
Assert(ostring.size != 0);
if (table_at_capacity(hits)){
Table new_hits = {0};
search_hits_table_alloc(general, &new_hits, hits->max*2);
table_clear(&new_hits);
table_rehash(hits, &new_hits, space->space, tbl_offset_string_hash, tbl_offset_string_compare);
general_memory_free(general, hits->hash_array);
*hits = new_hits;
}
if (!table_add(hits, &ostring, space->space, tbl_offset_string_hash, tbl_offset_string_compare)){
result = true;
strspace_keep_prev(space);
}
else{
strspace_discard_prev(space);
}
return(result);
}
//
// Search Key Checking
//
typedef uint32_t Seek_Potential_Match_Direction;
enum{
SeekPotentialMatch_Forward,
SeekPotentialMatch_Backward,
};
static void
seek_potential_match(Application_Links *app, Search_Range *range, Search_Key key, Search_Match *result, Seek_Potential_Match_Direction direction, int32_t start_pos, int32_t end_pos){
bool32 case_insensitive = ((range->flags & SearchFlag_CaseInsensitive) != 0);
bool32 forward = (direction == SeekPotentialMatch_Forward);
#define OptFlag(b,f) ((b)?(f):(0))
Buffer_Seek_String_Flags flags = 0
| OptFlag(case_insensitive, BufferSeekString_CaseInsensitive)
| OptFlag(!forward, BufferSeekString_Backward);
result->buffer = get_buffer(app, range->buffer, AccessAll);
int32_t best_pos = -1;
if (forward){
best_pos = end_pos;
}
for (int32_t i = 0; i < key.count; ++i){
String word = key.words[i];
int32_t new_pos = -1;
buffer_seek_string(app, &result->buffer, start_pos, end_pos, range->start, word.str, word.size, &new_pos, flags);
if (new_pos >= 0 && new_pos < end_pos){
if (forward){
if (new_pos < best_pos){
best_pos = new_pos;
}
}
else{
if (new_pos > best_pos){
best_pos = new_pos;
}
}
}
}
result->start = best_pos;
}
static int32_t
buffer_seek_alpha_numeric_end(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char space[1024];
Stream_Chunk chunk = {0};
if (init_stream_chunk(&chunk, app, buffer, pos, space, sizeof(space))){
int32_t still_looping = true;
do{
for (; pos < chunk.end; ++pos){
uint8_t at_pos = (uint8_t)chunk.data[pos];
if (!char_is_alpha_numeric_utf8(at_pos)) goto double_break;
}
still_looping = forward_stream_chunk(&chunk);
}while(still_looping);
}
double_break:;
return(pos);
}
enum{
FindResult_None,
FindResult_FoundMatch,
FindResult_PastEnd,
};
static int32_t
match_check(Application_Links *app, Search_Range *range, int32_t *pos, Search_Match *result_ptr, Search_Key key){
int32_t result_code = FindResult_None;
Search_Match result = *result_ptr;
int32_t end_pos = range->start + range->size;
int32_t type = (range->flags & SearchFlag_MatchMask);
result.match_word_index = -1;
for (int32_t i = 0; i < key.count; ++i){
String word = key.words[i];
int32_t found_match = FindResult_None;
switch (type){
case SearchFlag_MatchWholeWord:
{
char prev = ' ';
if (char_is_alpha_numeric_utf8(word.str[0])){
prev = buffer_get_char(app, &result.buffer, result.start - 1);
}
if (!char_is_alpha_numeric_utf8(prev)){
result.end = result.start + word.size;
if (result.end <= end_pos){
char next = ' ';
if (char_is_alpha_numeric_utf8(word.str[word.size-1])){
next = buffer_get_char(app, &result.buffer, result.end);
}
if (!char_is_alpha_numeric_utf8(next)){
result.found_match = true;
found_match = FindResult_FoundMatch;
}
}
else{
found_match = FindResult_PastEnd;
}
}
}break;
case SearchFlag_MatchWordPrefix:
{
char prev = buffer_get_char(app, &result.buffer, result.start - 1);
if (!char_is_alpha_numeric_utf8(prev)){
result.end =
buffer_seek_alpha_numeric_end(app, &result.buffer, result.start);
if (result.end <= end_pos){
result.found_match = true;
found_match = FindResult_FoundMatch;
}
else{
found_match = FindResult_PastEnd;
}
}
}break;
case SearchFlag_MatchSubstring:
{
result.end = result.start + word.size;
if (result.end <= end_pos){
result.found_match = true;
found_match = FindResult_FoundMatch;
}
else{
found_match = FindResult_PastEnd;
}
}break;
}
if (found_match == FindResult_FoundMatch){
result_code = FindResult_FoundMatch;
result.match_word_index = i;
break;
}
else if (found_match == FindResult_PastEnd){
result_code = FindResult_PastEnd;
}
}
*result_ptr = result;
return(result_code);
}
//
// Find Next Match
//
static int32_t
search_front_to_back(Application_Links *app, Search_Range *range, Search_Key key, int32_t *pos, Search_Match *result){
int32_t found_match = FindResult_None;
for (;found_match == FindResult_None;){
found_match = FindResult_None;
int32_t end_pos = range->start + range->size;
if (*pos + key.min_size < end_pos){
int32_t start_pos = *pos;
if (start_pos < range->start){
start_pos = range->start;
}
seek_potential_match(app, range, key, result, SeekPotentialMatch_Forward, start_pos, end_pos);
if (result->start < end_pos){
*pos = result->start + 1;
found_match = match_check(app, range, pos, result, key);
if (found_match == FindResult_FoundMatch){
*pos = result->end;
}
}
else{
found_match = FindResult_PastEnd;
*pos = end_pos + 1;
}
}
else{
found_match = FindResult_PastEnd;
*pos = end_pos + 1;
}
}
return(found_match);
}
static int32_t
search_back_to_front(Application_Links *app, Search_Range *range, Search_Key key, int32_t *pos, Search_Match *result){
int32_t found_match = FindResult_None;
for (;found_match == FindResult_None;){
found_match = FindResult_None;
if (*pos > range->start){
int32_t start_pos = *pos;
seek_potential_match(app, range, key, result, SeekPotentialMatch_Backward, start_pos, 0);
if (result->start >= range->start){
*pos = result->start - 1;
found_match = match_check(app, range, pos, result, key);
if (found_match == FindResult_FoundMatch){
*pos = result->start - key.words[result->match_word_index].size;
}
}
else{
found_match = FindResult_PastEnd;
}
}
else{
found_match = FindResult_PastEnd;
}
}
return(found_match);
}
static void
search_iter_next_range(Search_Iter *it){
++it->i;
it->pos = 0;
it->back_pos = 0;
it->range_initialized = 0;
}
static Search_Match
search_next_match(Application_Links *app, Search_Set *set, Search_Iter *it_ptr){
Search_Match result = {0};
Search_Iter iter = *it_ptr;
int32_t count = set->count;
for (; iter.i < count;){
Search_Range *range = set->ranges + iter.i;
int32_t find_result = FindResult_None;
if (!iter.range_initialized){
iter.range_initialized = true;
switch (range->type){
case SearchRange_BackToFront:
{
iter.back_pos = range->start+range->size-1;
}break;
case SearchRange_Wave:
{
iter.back_pos = range->mid_start-1;
iter.pos = range->mid_start + range->mid_size;
}break;
}
}
switch (range->type){
case SearchRange_FrontToBack:
{
find_result = search_front_to_back(app, range, iter.key, &iter.pos, &result);
}break;
case SearchRange_BackToFront:
{
find_result = search_back_to_front(app, range, iter.key, &iter.back_pos, &result);
}break;
case SearchRange_Wave:
{
Search_Match forward_match = {0};
Search_Match backward_match = {0};
int32_t forward_result = FindResult_PastEnd;
int32_t backward_result = FindResult_PastEnd;
if (iter.pos < range->start + range->size){
forward_result = search_front_to_back(app, range, iter.key, &iter.pos, &forward_match);
}
if (iter.back_pos > range->start){
backward_result = search_back_to_front(app, range, iter.key, &iter.back_pos, &backward_match);
}
if (forward_result == FindResult_FoundMatch){
if (backward_result == FindResult_FoundMatch){
find_result = FindResult_FoundMatch;
int32_t forward_start = range->mid_start + range->mid_size;
int32_t forward_distance = (forward_match.start - forward_start);
int32_t backward_distance = (range->mid_start - backward_match.end);
if (backward_distance < forward_distance){
iter.pos = forward_match.start;
result = backward_match;
}
else{
iter.back_pos = backward_match.start;
result = forward_match;
}
}
else{
find_result = FindResult_FoundMatch;
result = forward_match;
}
}
else{
if (backward_result == FindResult_FoundMatch){
find_result = FindResult_FoundMatch;
result = backward_match;
--iter.pos;
}
else{
find_result = FindResult_PastEnd;
}
}
}break;
}
if (find_result == FindResult_FoundMatch){
goto double_break;
}
else if (find_result == FindResult_PastEnd){
search_iter_next_range(&iter);
}
}
double_break:;
*it_ptr = iter;
return(result);
}
//
// Generic Search All Buffers
//
static void
initialize_generic_search_all_buffers(Application_Links *app, General_Memory *general, String *strings, int32_t count, Search_Range_Flag match_flags, int32_t *skip_buffers, int32_t skip_buffer_count, Search_Set *set, Search_Iter *iter){
memset(set, 0, sizeof(*set));
memset(iter, 0, sizeof(*iter));
Search_Key key = {0};
int32_t sizes[ArrayCount(key.words)];
memset(sizes, 0, sizeof(sizes));
if (count > ArrayCount(key.words)){
count = ArrayCount(key.words);
}
for (int32_t i = 0; i < count; ++i){
sizes[i] = strings[i].size;
}
// TODO(allen): Why on earth am I allocating these separately in this case? Upgrade to just use the string array on the stack!
search_key_alloc(general, &key, sizes, count);
for (int32_t i = 0; i < count; ++i){
copy_ss(&key.words[i], strings[i]);
}
search_iter_init(iter, key);
int32_t buffer_count = get_buffer_count(app);
search_set_init(general, set, buffer_count);
Search_Range *ranges = set->ranges;
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
int32_t j = 0;
if (buffer.exists){
bool32 skip = false;
for (int32_t i = 0; i < skip_buffer_count; ++i){
if (buffer.buffer_id == skip_buffers[i]){
skip = true;
break;
}
}
if (!skip){
ranges[0].type = SearchRange_FrontToBack;
ranges[0].flags = match_flags;
ranges[0].buffer = buffer.buffer_id;
ranges[0].start = 0;
ranges[0].size = buffer.size;
j = 1;
}
}
for (Buffer_Summary buffer_it = get_buffer_first(app, AccessAll);
buffer_it.exists;
get_buffer_next(app, &buffer_it, AccessAll)){
if (buffer.buffer_id != buffer_it.buffer_id){
bool32 skip = false;
for (int32_t i = 0; i < skip_buffer_count; ++i){
if (buffer.buffer_id == skip_buffers[i]){
skip = true;
break;
}
}
if (!skip){
if (buffer_it.buffer_name[0] != '*'){
ranges[j].type = SearchRange_FrontToBack;
ranges[j].flags = match_flags;
ranges[j].buffer = buffer_it.buffer_id;
ranges[j].start = 0;
ranges[j].size = buffer_it.size;
++j;
}
}
}
}
set->count = j;
}
//
// List all Locations
//
static void
buffered_print_flush(Application_Links *app, Partition *part, Temp_Memory temp, Buffer_Summary *output_buffer){
int32_t size = output_buffer->size;
int32_t write_size = part->pos - temp.pos;
char *str = part->base + temp.pos;
buffer_replace_range(app, output_buffer, size, size, str, write_size);
}
static void
buffered_print_match_jump_line(Application_Links *app, Partition *part, Temp_Memory temp, Partition *line_part, Buffer_Summary *output_buffer, Buffer_Summary *match_buffer, Partial_Cursor word_pos){
char *file_name = match_buffer->buffer_name;
int32_t file_len = match_buffer->buffer_name_len;
int32_t line_num_len = int_to_str_size(word_pos.line);
int32_t column_num_len = int_to_str_size(word_pos.character);
Temp_Memory line_temp = begin_temp_memory(line_part);
String line_str = {0};
if (read_line(app, line_part, match_buffer, word_pos.line, &line_str)){
line_str = skip_chop_whitespace(line_str);
int32_t str_len = file_len + 1 + line_num_len + 1 + column_num_len + 1 + 1 + line_str.size + 1;
char *spare = push_array(part, char, str_len);
if (spare == 0){
buffered_print_flush(app, part, temp, output_buffer);
end_temp_memory(temp);
temp = begin_temp_memory(part);
spare = push_array(part, char, str_len);
}
String out_line = make_string_cap(spare, 0, str_len);
append_ss(&out_line, make_string(file_name, file_len));
append_s_char(&out_line, ':');
append_int_to_str(&out_line, word_pos.line);
append_s_char(&out_line, ':');
append_int_to_str(&out_line, word_pos.character);
append_s_char(&out_line, ':');
append_s_char(&out_line, ' ');
append_ss(&out_line, line_str);
append_s_char(&out_line, '\n');
Assert(out_line.size == str_len);
}
end_temp_memory(line_temp);
}
static void
list_all_locations_parameters(Application_Links *app, General_Memory *general, Partition *part, String *strings, int32_t count, Search_Range_Flag match_flags){
// Open the search buffer
String search_name = make_lit_string("*search*");
Buffer_Summary search_buffer = get_buffer_by_name(app, search_name.str, search_name.size, AccessAll);
if (!search_buffer.exists){
search_buffer = create_buffer(app, search_name.str, search_name.size, BufferCreate_AlwaysNew);
buffer_set_setting(app, &search_buffer, BufferSetting_Unimportant, true);
buffer_set_setting(app, &search_buffer, BufferSetting_ReadOnly, true);
buffer_set_setting(app, &search_buffer, BufferSetting_WrapLine, false);
}
else{
buffer_send_end_signal(app, &search_buffer);
buffer_replace_range(app, &search_buffer, 0, search_buffer.size, 0, 0);
}
// Initialize a generic search all buffers
Search_Set set = {0};
Search_Iter iter = {0};
initialize_generic_search_all_buffers(app, general, strings, count, match_flags, &search_buffer.buffer_id, 1, &set, &iter);
// List all locations into search buffer
Temp_Memory all_temp = begin_temp_memory(part);
Partition line_part = partition_sub_part(part, (4 << 10));
Temp_Memory temp = begin_temp_memory(part);
for (Search_Match match = search_next_match(app, &set, &iter);
match.found_match;
match = search_next_match(app, &set, &iter)){
Partial_Cursor word_pos = {0};
if (buffer_compute_cursor(app, &match.buffer, seek_pos(match.start), &word_pos)){
buffered_print_match_jump_line(app, part, temp, &line_part, &search_buffer, &match.buffer, word_pos);
}
}
buffered_print_flush(app, part, temp, &search_buffer);
end_temp_memory(all_temp);
// Lock this *search* as the jump buffer
View_Summary view = get_active_view(app, AccessAll);
view_set_buffer(app, &view, search_buffer.buffer_id, 0);
lock_jump_buffer(search_name.str, search_name.size);
}
//
// List Commands
//
static void
get_search_all_string(Application_Links *app, Query_Bar *bar, char *string_space, int32_t space_size){
bar->prompt = make_lit_string("List Locations For: ");
bar->string = make_string_cap(string_space, 0, space_size);
if (!query_user_string(app, bar)){
bar->string.size = 0;
}
}
CUSTOM_COMMAND_SIG(list_all_locations)
CUSTOM_DOC("Queries the user for a string and lists all exact case-sensitive matches found in all open buffers.")
{
char string_space[1024];
Query_Bar bar;
get_search_all_string(app, &bar, string_space, sizeof(string_space));
if (bar.string.size == 0) return;
list_all_locations_parameters(app, &global_general, &global_part, &bar.string, 1, SearchFlag_MatchWholeWord);
}
CUSTOM_COMMAND_SIG(list_all_substring_locations)
CUSTOM_DOC("Queries the user for a string and lists all case-sensitive substring matches found in all open buffers.")
{
char string_space[1024];
Query_Bar bar;
get_search_all_string(app, &bar, string_space, sizeof(string_space));
if (bar.string.size == 0) return;
list_all_locations_parameters(app, &global_general, &global_part, &bar.string, 1, SearchFlag_MatchSubstring);
}
CUSTOM_COMMAND_SIG(list_all_locations_case_insensitive)
CUSTOM_DOC("Queries the user for a string and lists all exact case-insensitive matches found in all open buffers.")
{
char string_space[1024];
Query_Bar bar;
get_search_all_string(app, &bar, string_space, sizeof(string_space));
if (bar.string.size == 0) return;
list_all_locations_parameters(app, &global_general, &global_part, &bar.string, 1, SearchFlag_CaseInsensitive | SearchFlag_MatchWholeWord);
}
CUSTOM_COMMAND_SIG(list_all_substring_locations_case_insensitive)
CUSTOM_DOC("Queries the user for a string and lists all case-insensitive substring matches found in all open buffers.")
{
char string_space[1024];
Query_Bar bar;
get_search_all_string(app, &bar, string_space, sizeof(string_space));
if (bar.string.size == 0) return;
list_all_locations_parameters(app, &global_general, &global_part, &bar.string, 1, SearchFlag_CaseInsensitive | SearchFlag_MatchSubstring);
}
static String
get_token_or_word_under_pos(Application_Links *app, Buffer_Summary *buffer, int32_t pos, char *space, int32_t capacity){
String result = {0};
Cpp_Get_Token_Result get_result = {0};
bool32 success = buffer_get_token_index(app, buffer, pos, &get_result);
if (success && !get_result.in_whitespace){
int32_t size = get_result.token_end - get_result.token_start;
if (size > 0 && size <= capacity){
success = buffer_read_range(app, buffer, get_result.token_start, get_result.token_end, space);
if (success){
result = make_string(space, size);
}
}
}
return(result);
}
static void
list_all_locations_of_identifier_parameters(Application_Links *app, bool32 substrings, bool32 case_insensitive){
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
char space[512];
String str = get_token_or_word_under_pos(app, &buffer, view.cursor.pos, space, sizeof(space));
if (str.str != 0){
change_active_panel(app);
Search_Range_Flag flags = 0;
if (substrings){
flags |= SearchFlag_MatchSubstring;
}
else{
flags |= SearchFlag_MatchWholeWord;
}
if (case_insensitive){
flags |= SearchFlag_CaseInsensitive;
}
list_all_locations_parameters(app, &global_general, &global_part, &str, 1, flags);
}
}
CUSTOM_COMMAND_SIG(list_all_locations_of_identifier)
CUSTOM_DOC("Reads a token or word under the cursor and lists all exact case-sensitive mathces in all open buffers.")
{
list_all_locations_of_identifier_parameters(app, false, false);
}
CUSTOM_COMMAND_SIG(list_all_locations_of_identifier_case_insensitive)
CUSTOM_DOC("Reads a token or word under the cursor and lists all exact case-insensitive mathces in all open buffers.")
{
list_all_locations_of_identifier_parameters(app, false, true);
}
static void
list_all_locations_of_selection_parameters(Application_Links *app, bool32 substrings, bool32 case_insensitive){
View_Summary view = get_active_view(app, AccessProtected);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessProtected);
if (!buffer.exists){
return;
}
Partition *part = &global_part;
Temp_Memory temp = begin_temp_memory(part);
Range range = get_range(&view);
int32_t query_length = range.max - range.min;
if (query_length != 0){
char *query_space = push_array(part, char, query_length);
if (buffer_read_range(app, &buffer, range.min, range.max, query_space)){
String query = make_string(query_space, query_length);
Search_Range_Flag flags = 0;
if (substrings){
flags |= SearchFlag_MatchSubstring;
}
else{
flags |= SearchFlag_MatchWholeWord;
}
if (case_insensitive){
flags |= SearchFlag_CaseInsensitive;
}
list_all_locations_parameters(app, &global_general, &global_part, &query, 1, flags);
}
}
end_temp_memory(temp);
}
CUSTOM_COMMAND_SIG(list_all_locations_of_selection)
CUSTOM_DOC("Reads the string in the selected range and lists all exact case-sensitive mathces in all open buffers.")
{
list_all_locations_of_selection_parameters(app, false, false);
}
CUSTOM_COMMAND_SIG(list_all_locations_of_selection_case_insensitive)
CUSTOM_DOC("Reads the string in the selected range and lists all exact case-insensitive mathces in all open buffers.")
{
list_all_locations_of_selection_parameters(app, false, true);
}
//
// Word Complete Command
//
struct Word_Complete_State{
Search_Set set;
Search_Iter iter;
Table hits;
String_Space str;
int32_t word_start;
int32_t word_end;
int32_t initialized;
};
static Word_Complete_State complete_state = {0};
CUSTOM_COMMAND_SIG(word_complete)
CUSTOM_DOC("Iteratively tries completing the word to the left of the cursor with other words in open buffers that have the same prefix string.")
{
View_Summary view = get_active_view(app, AccessOpen);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessOpen);
// NOTE(allen): I just do this because this command is a lot of work
// and there is no point in doing any of it if nothing will happen anyway.
if (buffer.exists){
int32_t do_init = false;
if (view_paste_index[view.view_id].rewrite != RewriteWordComplete){
do_init = true;
}
view_paste_index[view.view_id].next_rewrite = RewriteWordComplete;
if (!complete_state.initialized){
do_init = true;
}
int32_t word_end = 0;
int32_t word_start = 0;
int32_t cursor_pos = 0;
int32_t size = 0;
if (do_init){
// NOTE(allen): Get the range where the
// partial word is written.
word_end = view.cursor.pos;
word_start = word_end;
cursor_pos = word_end - 1;
char space[1024];
Stream_Chunk chunk = {0};
if (init_stream_chunk(&chunk, app, &buffer, cursor_pos, space, sizeof(space))){
int32_t still_looping = true;
do{
for (; cursor_pos >= chunk.start; --cursor_pos){
char c = chunk.data[cursor_pos];
if (char_is_alpha_utf8(c)){
word_start = cursor_pos;
}
else if (!char_is_numeric(c)){
goto double_break;
}
}
still_looping = backward_stream_chunk(&chunk);
}while(still_looping);
}
double_break:;
size = word_end - word_start;
if (size == 0){
complete_state.initialized = false;
return;
}
// NOTE(allen): Initialize the search iterator with the partial word.
complete_state.initialized = true;
Search_Key key = {0};
search_key_alloc(&global_general, &key, &size, 1);
buffer_read_range(app, &buffer, word_start, word_end, key.words[0].str);
key.words[0].size = size;
search_iter_init(&complete_state.iter, key);
// NOTE(allen): Initialize the set of ranges to be searched.
int32_t buffer_count = get_buffer_count(app);
search_set_init(&global_general, &complete_state.set, buffer_count);
Search_Range *ranges = complete_state.set.ranges;
ranges[0].type = SearchRange_Wave;
ranges[0].flags = SearchFlag_MatchWordPrefix;
ranges[0].buffer = buffer.buffer_id;
ranges[0].start = 0;
ranges[0].size = buffer.size;
ranges[0].mid_start = word_start;
ranges[0].mid_size = size;
int32_t j = 1;
for (Buffer_Summary buffer_it = get_buffer_first(app, AccessAll);
buffer_it.exists;
get_buffer_next(app, &buffer_it, AccessAll)){
if (buffer.buffer_id != buffer_it.buffer_id){
ranges[j].type = SearchRange_FrontToBack;
ranges[j].flags = SearchFlag_MatchWordPrefix;
ranges[j].buffer = buffer_it.buffer_id;
ranges[j].start = 0;
ranges[j].size = buffer_it.size;
++j;
}
}
complete_state.set.count = j;
// NOTE(allen): Initialize the search hit table.
search_hits_init(&global_general, &complete_state.hits, &complete_state.str, 100, (4 << 10));
String word = complete_state.iter.key.words[0];
search_hit_add(&global_general, &complete_state.hits, &complete_state.str, word.str, word.size);
complete_state.word_start = word_start;
complete_state.word_end = word_end;
}
else{
word_start = complete_state.word_start;
word_end = complete_state.word_end;
size = complete_state.iter.key.words[0].size;
}
// NOTE(allen): Iterate through matches.
if (size > 0){
for (;;){
int32_t match_size = 0;
Search_Match match = search_next_match(app, &complete_state.set, &complete_state.iter);
if (match.found_match){
match_size = match.end - match.start;
Temp_Memory temp = begin_temp_memory(&global_part);
char *spare = push_array(&global_part, char, match_size);
buffer_read_range(app, &match.buffer, match.start, match.end, spare);
if (search_hit_add(&global_general, &complete_state.hits, &complete_state.str, spare, match_size)){
buffer_replace_range(app, &buffer, word_start, word_end, spare, match_size);
view_set_cursor(app, &view, seek_pos(word_start + match_size), true);
complete_state.word_end = word_start + match_size;
complete_state.set.ranges[0].mid_size = match_size;
end_temp_memory(temp);
break;
}
end_temp_memory(temp);
}
else{
complete_state.iter.pos = 0;
complete_state.iter.i = 0;
search_hits_init(&global_general, &complete_state.hits, &complete_state.str, 100, (4 << 10));
String word = complete_state.iter.key.words[0];
search_hit_add(&global_general, &complete_state.hits, &complete_state.str, word.str, word.size);
match_size = word.size;
char *str = word.str;
buffer_replace_range(app, &buffer, word_start, word_end, str, match_size);
view_set_cursor(app, &view, seek_pos(word_start + match_size), true);
complete_state.word_end = word_start + match_size;
complete_state.set.ranges[0].mid_size = match_size;
break;
}
}
}
}
}
#endif
// BOTTOM
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