4coder/4ed_file.cpp

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/*
* Mr. 4th Dimention - Allen Webster
*
* 03.01.2017
*
* File layer for 4coder
*
*/
// TOP
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internal Buffer_Slot_ID
to_file_id(i32 id){
Buffer_Slot_ID result;
result.id = id;
return(result);
}
////////////////////////////////
internal void
edit_pos_set_cursor(File_Edit_Positions *edit_pos, Full_Cursor cursor, b32 set_preferred_x, b32 unwrapped_lines){
edit_pos->cursor = cursor;
if (set_preferred_x){
edit_pos->preferred_x = cursor.wrapped_x;
if (unwrapped_lines){
edit_pos->preferred_x = cursor.unwrapped_x;
}
}
edit_pos->last_set_type = EditPos_CursorSet;
}
internal void
edit_pos_set_scroll(File_Edit_Positions *edit_pos, GUI_Scroll_Vars scroll){
edit_pos->scroll = scroll;
edit_pos->last_set_type = EditPos_ScrollSet;
}
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internal void
edit_pos_push(Editing_File *file, File_Edit_Positions edit_pos){
if (file->state.edit_pos_stack_top + 1 < ArrayCount(file->state.edit_pos_stack)){
file->state.edit_pos_stack_top += 1;
file->state.edit_pos_stack[file->state.edit_pos_stack_top] = edit_pos;
}
}
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internal File_Edit_Positions
edit_pos_pop(Editing_File *file){
File_Edit_Positions edit_pos = {};
if (file->state.edit_pos_stack_top >= 0){
edit_pos = file->state.edit_pos_stack[file->state.edit_pos_stack_top];
file->state.edit_pos_stack_top -= 1;
}
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return(edit_pos);
}
////////////////////////////////
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internal b32
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file_needs_save(Editing_File *file){
b32 result = false;
if (file->state.dirty == DirtyState_UnsavedChanges){
result = true;
}
return(result);
}
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internal b32
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file_can_save(Editing_File *file){
b32 result = false;
if (file->state.dirty == DirtyState_UnsavedChanges ||
file->state.dirty == DirtyState_UnloadedChanges){
result = true;
}
return(result);
}
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internal b32
file_is_ready(Editing_File *file){
b32 result = false;
if (file != 0 && file->is_loading == 0){
result = true;
}
return(result);
}
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internal void
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file_set_unimportant(Editing_File *file, b32 val){
if (val){
file->state.dirty = DirtyState_UpToDate;
}
file->settings.unimportant = (b8)(val != false);
}
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internal void
file_set_to_loading(Editing_File *file){
memset(&file->state, 0, sizeof(file->state));
memset(&file->settings, 0, sizeof(file->settings));
file->is_loading = true;
}
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internal void
file_set_dirty_flag(Editing_File *file, Dirty_State state){
if (!file->settings.unimportant){
file->state.dirty = state;
}
else{
file->state.dirty = DirtyState_UpToDate;
}
}
////////////////////////////////
internal b32
save_file_to_name(System_Functions *system, Models *models, Editing_File *file, char *filename){
b32 result = false;
b32 using_actual_filename = false;
if (filename == 0){
terminate_with_null(&file->canon.name);
filename = file->canon.name.str;
using_actual_filename = true;
}
if (filename != 0){
Mem_Options *mem = &models->mem;
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if (models->hook_save_file != 0){
models->hook_save_file(&models->app_links, file->id.id);
}
Gap_Buffer *buffer = &file->state.buffer;
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b32 dos_write_mode = file->settings.dos_write_mode;
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i32 max = 0;
if (dos_write_mode){
max = buffer_size(buffer) + buffer->line_count + 1;
}
else{
max = buffer_size(buffer);
}
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b32 used_heap = 0;
Temp_Memory temp = begin_temp_memory(&mem->part);
char empty = 0;
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char *data = 0;
if (max == 0){
data = &empty;
}
else{
data = (char*)push_array(&mem->part, char, max);
if (!data){
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used_heap = 1;
data = heap_array(&mem->heap, char, max);
}
}
Assert(data != 0);
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i32 size = 0;
if (dos_write_mode){
size = buffer_convert_out(buffer, data, max);
}
else{
size = max;
buffer_stringify(buffer, 0, size, data);
}
if (!using_actual_filename && file->canon.name.str != 0){
char space[512];
u32 length = str_size(filename);
system->get_canonical(filename, length, space, sizeof(space));
char *source_path = file->canon.name.str;
if (match(space, source_path)){
using_actual_filename = true;
}
}
result = system->save_file(filename, data, size);
if (result && using_actual_filename){
file->state.ignore_behind_os = 1;
}
file_set_dirty_flag(file, DirtyState_UpToDate);
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if (used_heap){
heap_free(&mem->heap, data);
}
end_temp_memory(temp);
}
return(result);
}
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internal b32
save_file(System_Functions *system, Models *models, Editing_File *file){
b32 result = save_file_to_name(system, models, file, 0);
return(result);
}
////////////////////////////////
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internal b32
file_compute_partial_cursor(Editing_File *file, Buffer_Seek seek, Partial_Cursor *cursor){
b32 result = true;
switch (seek.type){
case buffer_seek_pos:
{
*cursor = buffer_partial_from_pos(&file->state.buffer, seek.pos);
}break;
case buffer_seek_line_char:
{
*cursor = buffer_partial_from_line_character(&file->state.buffer, seek.line, seek.character);
}break;
default:
{
result = false;
}break;
}
return(result);
}
internal Full_Cursor
file_compute_cursor(System_Functions *system, Editing_File *file, Buffer_Seek seek, b32 return_hint){
Font_Pointers font = system->font.get_pointers_by_id(file->settings.font_id);
Assert(font.valid);
Full_Cursor result = {};
Buffer_Cursor_Seek_Params params;
params.buffer = &file->state.buffer;
params.seek = seek;
params.system = system;
params.font = font;
params.wrap_line_index = file->state.wrap_line_index;
params.character_starts = file->state.character_starts;
params.virtual_white = file->settings.virtual_white;
params.return_hint = return_hint;
params.cursor_out = &result;
Buffer_Cursor_Seek_State state = {};
Buffer_Layout_Stop stop = {};
i32 size = buffer_size(params.buffer);
f32 line_shift = 0.f;
b32 do_wrap = 0;
i32 wrap_unit_end = 0;
b32 first_wrap_determination = 1;
i32 wrap_array_index = 0;
do{
stop = buffer_cursor_seek(&state, params, line_shift, do_wrap, wrap_unit_end);
switch (stop.status){
case BLStatus_NeedWrapDetermination:
{
if (stop.pos >= size){
do_wrap = 0;
wrap_unit_end = max_i32;
}
else{
if (first_wrap_determination){
wrap_array_index = binary_search(file->state.wrap_positions, stop.pos, 0, file->state.wrap_position_count);
++wrap_array_index;
if (file->state.wrap_positions[wrap_array_index] == stop.pos){
do_wrap = 1;
wrap_unit_end = file->state.wrap_positions[wrap_array_index];
}
else{
do_wrap = 0;
wrap_unit_end = file->state.wrap_positions[wrap_array_index];
}
first_wrap_determination = 0;
}
else{
Assert(stop.pos == wrap_unit_end);
do_wrap = 1;
++wrap_array_index;
wrap_unit_end = file->state.wrap_positions[wrap_array_index];
}
}
}break;
case BLStatus_NeedWrapLineShift:
case BLStatus_NeedLineShift:
{
line_shift = file->state.line_indents[stop.wrap_line_index];
}break;
}
}while(stop.status != BLStatus_Finished);
return(result);
}
////////////////////////////////
internal i32
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file_grow_starts_as_needed(Heap *heap, Gap_Buffer *buffer, i32 additional_lines){
b32 result = GROW_NOT_NEEDED;
i32 max = buffer->line_max;
i32 count = buffer->line_count;
i32 target_lines = count + additional_lines;
if (target_lines > max || max == 0){
max = l_round_up_i32(target_lines + max, KB(1));
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i32 *new_lines = heap_array(heap, i32, max);
if (new_lines != 0){
result = GROW_SUCCESS;
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memcpy(new_lines, buffer->line_starts, sizeof(*new_lines)*count);
heap_free(heap, buffer->line_starts);
buffer->line_starts = new_lines;
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buffer->line_max = max;
}
else{
result = GROW_FAILED;
}
}
return(result);
}
internal void
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file_measure_starts(Heap *heap, Gap_Buffer *buffer){
if (buffer->line_starts == 0){
i32 max = buffer->line_max = KB(1);
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buffer->line_starts = heap_array(heap, i32, max);
Assert(buffer->line_starts != 0);
}
Buffer_Measure_Starts state = {};
for (;buffer_measure_starts(&state, buffer);){
i32 count = state.count;
i32 max = ((buffer->line_max + 1) << 1);
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i32 *new_lines = heap_array(heap, i32, max);
Assert(new_lines != 0);
memcpy(new_lines, buffer->line_starts, sizeof(*new_lines)*count);
heap_free(heap, buffer->line_starts);
buffer->line_starts = new_lines;
buffer->line_max = max;
}
}
internal void
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file_allocate_metadata_as_needed(Heap *heap, Gap_Buffer *buffer, void **mem, i32 *mem_max_count, i32 count, i32 item_size){
if (*mem == 0){
i32 max = l_round_up_i32(((count + 1)*2), KB(1));
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*mem = heap_allocate(heap, max*item_size);
*mem_max_count = max;
Assert(*mem != 0);
}
else if (*mem_max_count < count){
i32 old_max = *mem_max_count;
i32 max = l_round_up_i32(((count + 1)*2), KB(1));
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void *new_mem = heap_allocate(heap, item_size*max);
memcpy(new_mem, *mem, item_size*old_max);
heap_free(heap, *mem);
*mem = new_mem;
*mem_max_count = max;
Assert(*mem != 0);
}
}
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internal void
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file_allocate_character_starts_as_needed(Heap *heap, Editing_File *file){
file_allocate_metadata_as_needed(heap,
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&file->state.buffer, (void**)&file->state.character_starts,
&file->state.character_start_max, file->state.buffer.line_count + 1, sizeof(i32));
}
internal void
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file_allocate_indents_as_needed(Heap *heap, Editing_File *file, i32 min_last_index){
i32 min_amount = min_last_index + 1;
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file_allocate_metadata_as_needed(heap,
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&file->state.buffer, (void**)&file->state.line_indents,
&file->state.line_indent_max, min_amount, sizeof(f32));
}
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internal void
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file_allocate_wraps_as_needed(Heap *heap, Editing_File *file){
file_allocate_metadata_as_needed(heap,
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&file->state.buffer, (void**)&file->state.wrap_line_index,
&file->state.wrap_max, file->state.buffer.line_count + 1, sizeof(f32));
}
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internal void
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file_allocate_wrap_positions_as_needed(Heap *heap, Editing_File *file, i32 min_last_index){
i32 min_amount = min_last_index + 1;
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file_allocate_metadata_as_needed(heap,
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&file->state.buffer, (void**)&file->state.wrap_positions,
&file->state.wrap_position_max, min_amount, sizeof(f32));
}
////////////////////////////////
internal void
file_create_from_string(System_Functions *system, Models *models, Editing_File *file, String val, u32 flags){
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Heap *heap = &models->mem.heap;
Partition *part = &models->mem.part;
Application_Links *app_links = &models->app_links;
memset(&file->state, 0, sizeof(file->state));
Gap_Buffer_Init init = buffer_begin_init(&file->state.buffer, val.str, val.size);
for (; buffer_init_need_more(&init); ){
i32 page_size = buffer_init_page_size(&init);
page_size = l_round_up_i32(page_size, KB(4));
if (page_size < KB(4)){
page_size = KB(4);
}
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void *data = heap_allocate(heap, page_size);
buffer_init_provide_page(&init, data, page_size);
}
i32 scratch_size = partition_remaining(part);
Assert(scratch_size > 0);
b32 init_success = buffer_end_init(&init, part->base + part->pos, scratch_size);
AllowLocal(init_success); Assert(init_success);
if (buffer_size(&file->state.buffer) < val.size){
file->settings.dos_write_mode = 1;
}
file_set_dirty_flag(file, DirtyState_UpToDate);
Face_ID font_id = models->global_font_id;
file->settings.font_id = font_id;
Font_Pointers font = system->font.get_pointers_by_id(font_id);
Assert(font.valid);
{
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file_measure_starts(heap, &file->state.buffer);
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file_allocate_character_starts_as_needed(heap, file);
buffer_measure_character_starts(system, font, &file->state.buffer, file->state.character_starts, 0, file->settings.virtual_white);
file_measure_wraps(system, &models->mem, file, font);
//adjust_views_looking_at_files_to_new_cursor(system, models, file);
}
file->lifetime_object = lifetime_alloc_object(heap, &models->lifetime_allocator, DynamicWorkspace_Buffer, file);
file->settings.read_only = ((flags & FileCreateFlag_ReadOnly) != 0);
if (!file->settings.read_only){
// TODO(allen): Redo undo system (if you don't mind the pun)
i32 request_size = KB(64);
file->state.undo.undo.max = request_size;
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file->state.undo.undo.strings = (u8*)heap_allocate(heap, request_size);
file->state.undo.undo.edit_max = request_size/sizeof(Edit_Step);
file->state.undo.undo.edits = (Edit_Step*)heap_allocate(heap, request_size);
file->state.undo.redo.max = request_size;
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file->state.undo.redo.strings = (u8*)heap_allocate(heap, request_size);
file->state.undo.redo.edit_max = request_size/sizeof(Edit_Step);
file->state.undo.redo.edits = (Edit_Step*)heap_allocate(heap, request_size);
file->state.undo.history.max = request_size;
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file->state.undo.history.strings = (u8*)heap_allocate(heap, request_size);
file->state.undo.history.edit_max = request_size/sizeof(Edit_Step);
file->state.undo.history.edits = (Edit_Step*)heap_allocate(heap, request_size);
file->state.undo.children.max = request_size;
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file->state.undo.children.strings = (u8*)heap_allocate(heap, request_size);
file->state.undo.children.edit_max = request_size/sizeof(Buffer_Edit);
file->state.undo.children.edits = (Buffer_Edit*)heap_allocate(heap, request_size);
file->state.undo.history_block_count = 1;
file->state.undo.history_head_block = 0;
file->state.undo.current_block_normal = 1;
}
// TODO(allen): do(cleanup the create and settings dance)
// Right now we have this thing where we call hook_open_file, which may or may not
// trigger a lex job or serial lex, or might just flag the buffer to say it wants
// tokens. Then we check if we need to lex still and do it here too. Better would
// be to make sure it always happens in one way.
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Open_File_Hook_Function *hook_open_file = models->hook_open_file;
if (hook_open_file != 0){
hook_open_file(app_links, file->id.id);
}
if (file->settings.tokens_exist){
if (file->state.token_array.tokens == 0){
file_first_lex(system, models, file);
}
}
else{
file_mark_edit_finished(&models->working_set, file);
}
file->settings.is_initialized = true;
}
internal void
file_free(System_Functions *system, Application_Links *app, Heap *heap, Lifetime_Allocator *lifetime_allocator,
Editing_File *file){
if (file->state.still_lexing){
system->cancel_job(BACKGROUND_THREADS, file->state.lex_job);
if (file->state.swap_array.tokens){
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heap_free(heap, file->state.swap_array.tokens);
file->state.swap_array.tokens = 0;
}
}
if (file->state.token_array.tokens){
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heap_free(heap, file->state.token_array.tokens);
}
lifetime_free_object(heap, lifetime_allocator, file->lifetime_object);
Gap_Buffer *buffer = &file->state.buffer;
if (buffer->data){
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heap_free(heap, buffer->data);
heap_free(heap, buffer->line_starts);
}
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heap_free(heap, file->state.wrap_line_index);
heap_free(heap, file->state.character_starts);
heap_free(heap, file->state.line_indents);
if (file->state.undo.undo.edits){
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heap_free(heap, file->state.undo.undo.strings);
heap_free(heap, file->state.undo.undo.edits);
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heap_free(heap, file->state.undo.redo.strings);
heap_free(heap, file->state.undo.redo.edits);
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heap_free(heap, file->state.undo.history.strings);
heap_free(heap, file->state.undo.history.edits);
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heap_free(heap, file->state.undo.children.strings);
heap_free(heap, file->state.undo.children.edits);
}
}
internal void
init_normal_file(System_Functions *system, Models *models, char *buffer, i32 size, Editing_File *file){
String val = make_string(buffer, size);
file_create_from_string(system, models, file, val, 0);
}
internal void
init_read_only_file(System_Functions *system, Models *models, Editing_File *file){
String val = null_string;
file_create_from_string(system, models, file, val, FileCreateFlag_ReadOnly);
}
// BOTTOM