4coder/4ed_view.cpp

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/*
* Mr. 4th Dimention - Allen Webster
*
* 19.08.2015
*
* Viewing
*
*/
// TOP
internal void
init_query_set(Query_Set *set){
Query_Slot *slot = set->slots;
set->free_slot = slot;
set->used_slot = 0;
for (i32 i = 0; i+1 < ArrayCount(set->slots); ++i, ++slot){
slot->next = slot + 1;
}
}
internal Query_Slot*
alloc_query_slot(Query_Set *set){
Query_Slot *slot = set->free_slot;
if (slot != 0){
set->free_slot = slot->next;
slot->next = set->used_slot;
set->used_slot = slot;
}
return(slot);
}
internal void
free_query_slot(Query_Set *set, Query_Bar *match_bar){
Query_Slot *slot = 0;
Query_Slot *prev = 0;
for (slot = set->used_slot; slot != 0; slot = slot->next){
if (slot->query_bar == match_bar) break;
prev = slot;
}
if (slot){
if (prev){
prev->next = slot->next;
}
else{
set->used_slot = slot->next;
}
slot->next = set->free_slot;
set->free_slot = slot;
}
}
function void
free_all_queries(Query_Set *set){
for (;set->used_slot != 0;){
Query_Slot *slot = set->used_slot;
set->used_slot = slot->next;
slot->next = set->free_slot;
set->free_slot = slot;
}
}
////////////////////////////////
internal Command_Map_ID
view_get_map(View *view){
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return(view->file->settings.base_map_id);
}
internal u32
view_get_access_flags(View *view){
u32 result = AccessOpen;
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View_Context_Node *node = view->ctx;
if (node != 0 && node->ctx.hides_buffer){
result |= AccessHidden;
}
result |= file_get_access_flags(view->file);
return(result);
}
internal i32
view_get_index(Live_Views *live_set, View *view){
return((i32)(view - live_set->views));
}
internal View_ID
view_get_id(Live_Views *live_set, View *view){
return((View_ID)(view - live_set->views) + 1);
}
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internal View*
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live_set_alloc_view(Lifetime_Allocator *lifetime_allocator, Live_Views *live_set, Panel *panel){
Assert(live_set->count < live_set->max);
++live_set->count;
View *result = live_set->free_sentinel.next;
dll_remove(result);
block_zero_struct(result);
result->in_use = true;
init_query_set(&result->query_set);
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result->lifetime_object = lifetime_alloc_object(lifetime_allocator, DynamicWorkspace_View, result);
panel->view = result;
result->panel = panel;
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return(result);
}
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internal void
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live_set_free_view(Lifetime_Allocator *lifetime_allocator, Live_Views *live_set, View *view){
Assert(live_set->count > 0);
--live_set->count;
view->next = live_set->free_sentinel.next;
view->prev = &live_set->free_sentinel;
live_set->free_sentinel.next = view;
view->next->prev = view;
view->in_use = false;
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lifetime_free_object(lifetime_allocator, view->lifetime_object);
}
////////////////////////////////
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internal File_Edit_Positions
view_get_edit_pos(View *view){
return(view->edit_pos_);
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}
internal void
view_set_edit_pos(View *view, File_Edit_Positions edit_pos){
edit_pos.scroll.position.line_number = clamp_bot(1, edit_pos.scroll.position.line_number);
edit_pos.scroll.target.line_number = clamp_bot(1, edit_pos.scroll.target.line_number);
view->edit_pos_ = edit_pos;
view->file->state.edit_pos_most_recent = edit_pos;
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}
////////////////////////////////
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internal Rect_f32
view_get_buffer_rect(Models *models, View *view){
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Rect_f32 region = {};
if (models->get_view_buffer_region != 0){
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Rect_f32 rect = Rf32(view->panel->rect_inner);
Rect_f32 sub_region = Rf32(V2(0, 0), rect_dim(rect));
sub_region = models->get_view_buffer_region(&models->app_links, view_get_id(&models->live_set, view), sub_region);
region.p0 = rect.p0 + sub_region.p0;
region.p1 = rect.p0 + sub_region.p1;
region.x1 = clamp_top(region.x1, rect.x1);
region.y1 = clamp_top(region.y1, rect.y1);
region.x0 = clamp_top(region.x0, region.x1);
region.y0 = clamp_top(region.y0, region.y1);
}
else{
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region = Rf32(view->panel->rect_inner);
}
return(region);
}
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internal f32
view_width(Models *models, View *view){
return(rect_width(view_get_buffer_rect(models, view)));
}
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internal f32
view_height(Models *models, View *view){
return(rect_height(view_get_buffer_rect(models, view)));
}
////////////////////////////////
internal Buffer_Layout_Item_List
view_get_line_layout(Models *models, View *view, i64 line_number){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_get_line_layout(models, file, width, face, line_number));
}
internal Line_Shift_Vertical
view_line_shift_y(Models *models, View *view, i64 line_number, f32 y_delta){
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Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_line_shift_y(models, file, width, face, line_number, y_delta));
}
internal f32
view_line_y_difference(Models *models, View *view, i64 line_a, i64 line_b){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_line_y_difference(models, file, width, face, line_a, line_b));
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}
internal i64
view_pos_at_relative_xy(Models *models, View *view, i64 base_line, Vec2_f32 relative_xy){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_pos_at_relative_xy(models, file, width, face, base_line, relative_xy));
}
internal Vec2_f32
view_relative_xy_of_pos(Models *models, View *view, i64 base_line, i64 pos){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_relative_xy_of_pos(models, file, width, face, base_line, pos));
}
internal Buffer_Point
view_normalize_buffer_point(Models *models, View *view, Buffer_Point point){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_normalize_buffer_point(models, file, width, face, point));
}
internal Vec2_f32
view_buffer_point_difference(Models *models, View *view, Buffer_Point a, Buffer_Point b){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_buffer_point_difference(models, file, width, face, a, b));
}
internal Buffer_Point
view_move_buffer_point(Models *models, View *view, Buffer_Point buffer_point, Vec2_f32 delta){
delta += buffer_point.pixel_shift;
Line_Shift_Vertical shift = view_line_shift_y(models, view, buffer_point.line_number, delta.y);
buffer_point.line_number = shift.line;
buffer_point.pixel_shift = V2f32(delta.x, delta.y - shift.y_delta);
return(buffer_point);
}
internal Line_Shift_Character
view_line_shift_characters(Models *models, View *view, i64 line_number, i64 character_delta){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_line_shift_characters(models, file, width, face, line_number, character_delta));
}
internal i64
view_line_character_difference(Models *models, View *view, i64 line_a, i64 line_b){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_line_character_difference(models, file, width, face, line_a, line_b));
}
internal i64
view_pos_from_relative_character(Models *models, View *view, i64 base_line, i64 relative_character){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_pos_from_relative_character(models, file, width, face, base_line, relative_character));
}
internal i64
view_relative_character_from_pos(Models *models, View *view, i64 base_line, i64 pos){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
f32 width = view_width(models, view);
return(file_relative_character_from_pos(models, file, width, face, base_line, pos));
}
internal Buffer_Cursor
view_compute_cursor(View *view, Buffer_Seek seek){
Editing_File *file = view->file;
return(file_compute_cursor(file, seek));
}
////////////////////////////////
internal Interval_f32
view_acceptable_y(f32 view_height, f32 line_height){
Interval_f32 acceptable_y = {};
if (view_height <= line_height*5.f){
if (view_height < line_height){
acceptable_y.max = view_height;
}
else{
acceptable_y.max = view_height - line_height;
}
}
else{
acceptable_y = If32(line_height*2.f, view_height - line_height*2.f);
}
return(acceptable_y);
}
internal Vec2_f32
view_safety_margin(f32 view_width, f32 acceptable_y_height, f32 line_height, f32 typical_advance){
Vec2_f32 safety = {};
safety.y = min(line_height*5.f, (acceptable_y_height + 1.f)*0.5f);
safety.x = min(view_width*0.5f, typical_advance*8.f);
return(safety);
}
internal b32
view_move_view_to_cursor(Models *models, View *view, Buffer_Scroll *scroll){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
Rect_f32 rect = view_get_buffer_rect(models, view);
Vec2_f32 view_dim = rect_dim(rect);
File_Edit_Positions edit_pos = view_get_edit_pos(view);
Vec2_f32 p = file_relative_xy_of_pos(models, file, view_dim.x, face, scroll->target.line_number,
edit_pos.cursor_pos);
p -= scroll->target.pixel_shift;
f32 line_height = face->line_height;
f32 typical_advance = face->typical_advance;
Interval_f32 acceptable_y = view_acceptable_y(view_dim.y, line_height);
Vec2_f32 safety = view_safety_margin(view_dim.x, range_size(acceptable_y), line_height, typical_advance);
Vec2_f32 target_p_relative = {};
if (p.y < acceptable_y.min){
target_p_relative.y = p.y - safety.y;
}
else if (p.y > acceptable_y.max){
target_p_relative.y = (p.y + safety.y) - view_dim.y;
}
if (p.x < 0.f){
target_p_relative.x = p.x - safety.x;
}
else if (p.x > view_dim.x){
target_p_relative.x = (p.x + safety.x) - view_dim.x;
}
scroll->target.pixel_shift = target_p_relative;
scroll->target = view_normalize_buffer_point(models, view, scroll->target);
scroll->target.pixel_shift.x = f32_round32(scroll->target.pixel_shift.x);
scroll->target.pixel_shift.y = f32_round32(scroll->target.pixel_shift.y);
return(target_p_relative != V2f32(0.f, 0.f));
}
internal b32
view_move_cursor_to_view(Models *models, View *view, Buffer_Scroll scroll, i64 *pos_in_out, f32 preferred_x){
Editing_File *file = view->file;
Face *face = file_get_face(models, file);
Rect_f32 rect = view_get_buffer_rect(models, view);
Vec2_f32 view_dim = rect_dim(rect);
Vec2_f32 p = file_relative_xy_of_pos(models, file, view_dim.x, face, scroll.target.line_number, *pos_in_out);
p -= scroll.target.pixel_shift;
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f32 line_height = face->line_height;
Interval_f32 acceptable_y = view_acceptable_y(view_dim.y, line_height);
Vec2_f32 safety = view_safety_margin(view_dim.x, range_size(acceptable_y),
line_height, face->typical_advance);
b32 adjusted_y = true;
if (p.y < acceptable_y.min){
p.y = acceptable_y.min + safety.y;
}
else if (p.y > acceptable_y.max){
p.y = acceptable_y.max - safety.y;
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}
else{
adjusted_y = false;
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}
b32 result = false;
if (adjusted_y){
p += scroll.target.pixel_shift;
*pos_in_out = file_pos_at_relative_xy(models, file, view_dim.x, face, scroll.target.line_number, p);
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result = true;
}
return(result);
}
internal void
view_set_cursor(Models *models, View *view, i64 pos){
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File_Edit_Positions edit_pos = view_get_edit_pos(view);
file_edit_positions_set_cursor(&edit_pos, pos);
view_set_edit_pos(view, edit_pos);
Buffer_Scroll scroll = edit_pos.scroll;
if (view_move_view_to_cursor(models, view, &scroll)){
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edit_pos.scroll = scroll;
view_set_edit_pos(view, edit_pos);
}
}
internal void
view_set_scroll(Models *models, View *view, Buffer_Scroll scroll){
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File_Edit_Positions edit_pos = view_get_edit_pos(view);
file_edit_positions_set_scroll(&edit_pos, scroll);
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view_set_edit_pos(view, edit_pos);
if (view_move_cursor_to_view(models, view, edit_pos.scroll, &edit_pos.cursor_pos, view->preferred_x)){
view_set_edit_pos(view, edit_pos);
}
}
internal void
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view_set_cursor_and_scroll(Models *models, View *view, i64 pos, Buffer_Scroll scroll){
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File_Edit_Positions edit_pos = view_get_edit_pos(view);
file_edit_positions_set_cursor(&edit_pos, pos);
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Buffer_Cursor cursor = view_compute_cursor(view, seek_pos(pos));
Vec2_f32 p = view_relative_xy_of_pos(models, view, cursor.line, pos);
view->preferred_x = p.x;
file_edit_positions_set_scroll(&edit_pos, scroll);
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edit_pos.last_set_type = EditPos_None;
view_set_edit_pos(view, edit_pos);
}
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internal void
view_post_paste_effect(View *view, f32 seconds, i64 start, i64 size, u32 color){
Editing_File *file = view->file;
file->state.paste_effect.start = start;
file->state.paste_effect.end = start + size;
file->state.paste_effect.color = color;
file->state.paste_effect.seconds_down = seconds;
file->state.paste_effect.seconds_max = seconds;
}
////////////////////////////////
internal void
view_set_file(Models *models, View *view, Editing_File *file){
Assert(file != 0);
Editing_File *old_file = view->file;
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if (old_file != 0){
file_touch(&models->working_set, old_file);
file_edit_positions_push(old_file, view_get_edit_pos(view));
}
view->file = file;
File_Edit_Positions edit_pos = file_edit_positions_pop(file);
view_set_edit_pos(view, edit_pos);
view->mark = edit_pos.cursor_pos;
Buffer_Cursor cursor = view_compute_cursor(view, seek_pos(edit_pos.cursor_pos));
Vec2_f32 p = view_relative_xy_of_pos(models, view, cursor.line, edit_pos.cursor_pos);
view->preferred_x = p.x;
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models->layout.panel_state_dirty = true;
}
////////////////////////////////
internal App_Coroutine_State
get_co_state(Application_Links *app){
App_Coroutine_State state = {};
state.co = app->current_coroutine;
state.type = app->type_coroutine;
return(state);
}
internal void
restore_co_state(Application_Links *app, App_Coroutine_State state){
app->current_coroutine = state.co;
app->type_coroutine = state.type;
}
internal Coroutine*
co_handle_request(Models *models, Coroutine *co, Co_Out *out){
Coroutine *result = 0;
switch (out->request){
case CoRequest_NewFontFace:
{
Face_Description *description = out->face_description;
Face *face = font_set_new_face(&models->font_set, description);
Co_In in = {};
in.face_id = face->id;
result = coroutine_run(&models->coroutines, co, &in, out);
}break;
case CoRequest_ModifyFace:
{
Face_Description *description = out->face_description;
Face_ID face_id = out->face_id;
Co_In in = {};
in.success = font_set_modify_face(&models->font_set, face_id, description);
result = coroutine_run(&models->coroutines, co, &in, out);
}break;
}
return(result);
}
internal Coroutine*
co_run(Models *models, App_Coroutine_Purpose purpose, Coroutine *co,
Co_In *in, Co_Out *out){
Application_Links *app = &models->app_links;
App_Coroutine_State prev_state = get_co_state(app);
app->current_coroutine = co;
app->type_coroutine = purpose;
Coroutine *result = coroutine_run(&models->coroutines, co, in, out);
for (;result != 0 && out->request != CoRequest_None;){
result = co_handle_request(models, result, out);
}
restore_co_state(app, prev_state);
return(result);
}
internal void
view_event_context_base__inner(Coroutine *coroutine){
Co_In *in = (Co_In*)coroutine->in;
Models *models = in->models;
Custom_Command_Function *event_context_base = in->event_context_base;
Assert(event_context_base != 0);
event_context_base(&models->app_links);
}
function void
view_init(Models *models, View *view, Editing_File *initial_buffer,
Custom_Command_Function *event_context_base){
view_set_file(models, view, initial_buffer);
view->co = coroutine_create(&models->coroutines, view_event_context_base__inner);
Co_In in = {};
in.models = models;
in.event_context_base = event_context_base;
view->co = co_run(models, Co_View, view->co, &in, &view->co_out);
// TODO(allen): deal with this kind of problem!
Assert(view->co != 0);
}
function b32
view_close(Models *models, View *view){
Layout *layout = &models->layout;
b32 result = false;
if (layout_close_panel(layout, view->panel)){
live_set_free_view(&models->lifetime_allocator, &models->live_set, view);
result = true;
}
return(result);
}
internal void
view_check_co_exited(Models *models, View *view){
if (view->co == 0){
b32 result = view_close(models, view);
// TODO(allen): Here it looks like the final view has
// closed exited from it's event handler. We should probably
// have a failsafe restarter for the event handler when this
// happens.
Assert(result);
}
}
internal void
co_single_abort(Models *models, View *view){
Coroutine *co = view->co;
Co_In in = {};
in.user_input.abort = true;
view->co = co_run(models, Co_View, co, &in, &view->co_out);
view_check_co_exited(models, view);
}
internal void
co_full_abort(Models *models, View *view){
Coroutine *co = view->co;
Co_In in = {};
in.user_input.abort = true;
for (u32 j = 0; j < 100 && co != 0; ++j){
co = co_run(models, Co_View, co, &in, &view->co_out);
}
if (co != 0){
#define M "SERIOUS ERROR: full stack abort did not complete"
print_message(&models->app_links, string_u8_litexpr(M));
#undef M
}
view->co = 0;
init_query_set(&view->query_set);
}
function b32
co_send_event(Models *models, View *view, Input_Event *event){
b32 event_was_handled = false;
Coroutine *co = view->co;
Co_Out *co_out = &view->co_out;
Event_Property abort_flags = co_out->abort_flags;
Event_Property get_flags = co_out->get_flags|abort_flags;
Event_Property event_flags = get_event_properties(event);
if ((get_flags&event_flags) != 0){
models->event_unhandled = false;
Co_In in = {};
in.user_input.event = *event;
in.user_input.abort = ((abort_flags & event_flags) != 0);
block_copy_struct(&models->event, &in.user_input.event);
view->co = co_run(models, Co_View, view->co, &in, &view->co_out);
view_check_co_exited(models, view);
if (!HasFlag(event_flags, EventProperty_Animate)){
models->animate_next_frame = true;
}
event_was_handled = !models->event_unhandled;
}
return(event_was_handled);
}
function b32
co_send_core_event(Models *models, View *view, Core_Code code){
Input_Event event = {};
event.kind = InputEventKind_Core;
event.core.code = code;
return(co_send_event(models, view, &event));
}
////////////////////////////////
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function View_Context_Node*
view__alloc_context_node(Live_Views *views){
View_Context_Node *node = views->free_nodes;
if (node != 0){
sll_stack_pop(views->free_nodes);
}
else{
node = push_array(views->node_arena, View_Context_Node, 1);
}
return(node);
}
function void
view__free_context_node(Live_Views *views, View_Context_Node *node){
sll_stack_push(views->free_nodes, node);
}
function void
view_push_context(Models *models, View *view, View_Context *ctx){
View_Context_Node *node = view__alloc_context_node(&models->live_set);
sll_stack_push(view->ctx, node);
block_copy_struct(&node->ctx, ctx);
}
function void
view_pop_context(Models *models, View *view){
View_Context_Node *node = view->ctx;
if (node != 0){
sll_stack_pop(view->ctx);
view__free_context_node(&models->live_set, node);
}
}
function View_Context
view_current_context(Models *models, View *view){
View_Context ctx = {};
View_Context_Node *node = view->ctx;
if (node != 0){
block_copy_struct(&ctx, &node->ctx);
}
return(ctx);
}
////////////////////////////////
internal b32
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file_is_viewed(Layout *layout, Editing_File *file){
b32 is_viewed = false;
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for (Panel *panel = layout_get_first_open_panel(layout);
panel != 0;
panel = layout_get_next_open_panel(layout, panel)){
View *view = panel->view;
if (view->file == file){
is_viewed = true;
break;
}
}
return(is_viewed);
}
internal void
adjust_views_looking_at_file_to_new_cursor(Models *models, Editing_File *file){
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Layout *layout = &models->layout;
for (Panel *panel = layout_get_first_open_panel(layout);
panel != 0;
panel = layout_get_next_open_panel(layout, panel)){
View *view = panel->view;
if (view->file == file){
File_Edit_Positions edit_pos = view_get_edit_pos(view);
view_set_cursor(models, view, edit_pos.cursor_pos);
}
}
}
internal void
global_set_font_and_update_files(Models *models, Face *new_global_face){
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for (Node *node = models->working_set.active_file_sentinel.next;
node != &models->working_set.active_file_sentinel;
node = node->next){
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Editing_File *file = CastFromMember(Editing_File, main_chain_node, node);
file->settings.face_id = new_global_face->id;
}
models->global_face_id = new_global_face->id;
}
internal b32
release_font_and_update(Models *models, Face *face, Face *replacement_face){
b32 success = false;
Assert(replacement_face != 0 && replacement_face != face);
if (font_set_release_face(&models->font_set, face->id)){
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for (Node *node = models->working_set.active_file_sentinel.next;
node != &models->working_set.active_file_sentinel;
node = node->next){
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Editing_File *file = CastFromMember(Editing_File, main_chain_node, node);
if (file->settings.face_id == face->id){
file->settings.face_id = replacement_face->id;
}
}
if (models->global_face_id == face->id){
models->global_face_id = replacement_face->id;
}
success = true;
}
return(success);
}
////////////////////////////////
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internal argb_color
finalize_color(Color_Table color_table, int_color color){
argb_color color_argb = color;
if ((color & 0xFF000000) == 0){
color_argb = color_table.vals[color % color_table.count];
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}
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return(color_argb);
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}
////////////////////////////////
internal View*
imp_get_view(Models *models, View_ID view_id){
Live_Views *live_set = &models->live_set;
View *view = 0;
view_id -= 1;
if (0 <= view_id && view_id < live_set->max){
view = live_set->views + view_id;
if (!view->in_use){
view = 0;
}
}
return(view);
}
// BOTTOM