layout handles, looking up cursor values

4coder_API/4coder_types.h

@@ -34,6 +34,13 @@ TYPEDEF i32 View_ID;
 
 TYPEDEF i32 Panel_ID;
 
+TYPEDEF u32 Text_Layout_ID;
+
+STRUCT Buffer_Point{
+    i32 line_number;
+    Vec2 pixel_shift;
+};
+
 ENUM(u32, Child_Process_Set_Target_Flags){
     ChildProcessSet_FailIfBufferAlreadyAttachedToAProcess = 1,
     ChildProcessSet_FailIfProcessAlreadyAttachedToABuffer = 2,

4coder_default_hooks.cpp

@@ -321,16 +321,11 @@ struct View_Render_Parameters{
     Rect_i32 buffer_rect;
 };
 
-struct Buffer_Position{
+static Buffer_Point
-    i32 line_number;
-    Vec2 pixel_shift;
-};
-
-static Buffer_Position
 buffer_position_from_scroll_position(Application_Links *app, View_ID view_id, Vec2 scroll){
     Full_Cursor render_cursor = {};
     view_compute_cursor(app, view_id, seek_wrapped_xy(scroll.x, scroll.y, false), &render_cursor);
-    Buffer_Position result = {};
+    Buffer_Point result = {};
     result.line_number = render_cursor.line;
     result.pixel_shift.x = scroll.x;
     result.pixel_shift.y = scroll.y - render_cursor.wrapped_y;
@@ -355,11 +350,11 @@ default_buffer_render_caller(Application_Links *app, Frame_Info frame_info, View
     GUI_Scroll_Vars scroll = {};
     view_get_scroll_vars(app, view_id, &scroll);
     
-    Buffer_Position buffer_pos = buffer_position_from_scroll_position(app, view_id, scroll.scroll_p);
+    Buffer_Point buffer_point = buffer_position_from_scroll_position(app, view_id, scroll.scroll_p);
     Range on_screen_range = {};
-    compute_render_layout(app, view_id, buffer_id, buffer_rect,
+    Text_Layout_ID text_layout_id = 0;
-                          buffer_pos.line_number, buffer_pos.pixel_shift.y, buffer_pos.pixel_shift.x,
+    compute_render_layout(app, view_id, buffer_id, buffer_rect, buffer_point,
-                          &on_screen_range);
+                          &on_screen_range, &text_layout_id);
     
     View_Summary view = get_view(app, view_id, AccessAll);
     Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessAll);
@@ -704,6 +699,7 @@ default_buffer_render_caller(Application_Links *app, Frame_Info frame_info, View
     }
     
     draw_render_layout(app, view_id);
+    text_layout_free(app, text_layout_id);
     
     // NOTE(allen): FPS HUD
     if (show_fps_hud){

4coder_fancy.cpp

@@ -216,9 +216,12 @@ draw_fancy_string(Application_Links *app, Face_ID font_id, Fancy_String *string,
         // TODO(casey): need to fill the background here, but I don't know the line height,
         // and I can't actually render filled shapes, so, like, I can't properly do dP :(
         
-        P += (string->pre_margin)*dP;
+        Face_Metrics metrics = {};
+        get_face_metrics(app, font_id, &metrics);
+        
+        P += (string->pre_margin*metrics.typical_character_width)*dP;
         draw_string(app, use_font_id, string->value, P, use_fore, flags, dP);
-        P += (adv + string->post_margin)*dP;
+        P += (adv + string->post_margin*metrics.typical_character_width)*dP;
     }
     return(P);
 }

4coder_generated/app_functions.h

@@ -168,7 +168,10 @@ struct Application_Links;
 #define DRAW_COORDINATE_CENTER_PUSH_SIG(n) void n(Application_Links *app, Vec2 point)
 #define DRAW_COORDINATE_CENTER_POP_SIG(n) Vec2 n(Application_Links *app)
 #define GET_DEFAULT_FONT_FOR_VIEW_SIG(n) Face_ID n(Application_Links *app, View_ID view_id)
-#define COMPUTE_RENDER_LAYOUT_SIG(n) b32 n(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, i32 buffer_line_number, f32 y_pixel_shift, f32 scroll_x, Range *on_screen_range_out)
+#define TEXT_LAYOUT_GET_BUFFER_SIG(n) b32 n(Application_Links *app, Text_Layout_ID text_layout_id, Buffer_ID *buffer_id_out)
+#define TEXT_LAYOUT_COMPUTE_CURSOR_SIG(n) b32 n(Application_Links *app, Text_Layout_ID text_layout_id, Vec2 p, b32 round_down, Full_Cursor *cursor_out)
+#define TEXT_LAYOUT_FREE_SIG(n) b32 n(Application_Links *app, Text_Layout_ID text_layout_id)
+#define COMPUTE_RENDER_LAYOUT_SIG(n) b32 n(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, Buffer_Point buffer_point, Range *on_screen_range_out, Text_Layout_ID *text_layout_id_out)
 #define DRAW_RENDER_LAYOUT_SIG(n) void n(Application_Links *app, View_ID view_id)
 #define OPEN_COLOR_PICKER_SIG(n) void n(Application_Links *app, color_picker *picker)
 #define ANIMATE_IN_N_MILLISECONDS_SIG(n) void n(Application_Links *app, u32 n)
@@ -343,6 +346,9 @@ typedef DRAW_CLIP_POP_SIG(Draw_Clip_Pop_Function);
 typedef DRAW_COORDINATE_CENTER_PUSH_SIG(Draw_Coordinate_Center_Push_Function);
 typedef DRAW_COORDINATE_CENTER_POP_SIG(Draw_Coordinate_Center_Pop_Function);
 typedef GET_DEFAULT_FONT_FOR_VIEW_SIG(Get_Default_Font_For_View_Function);
+typedef TEXT_LAYOUT_GET_BUFFER_SIG(Text_Layout_Get_Buffer_Function);
+typedef TEXT_LAYOUT_COMPUTE_CURSOR_SIG(Text_Layout_Compute_Cursor_Function);
+typedef TEXT_LAYOUT_FREE_SIG(Text_Layout_Free_Function);
 typedef COMPUTE_RENDER_LAYOUT_SIG(Compute_Render_Layout_Function);
 typedef DRAW_RENDER_LAYOUT_SIG(Draw_Render_Layout_Function);
 typedef OPEN_COLOR_PICKER_SIG(Open_Color_Picker_Function);
@@ -520,6 +526,9 @@ Draw_Clip_Pop_Function *draw_clip_pop;
 Draw_Coordinate_Center_Push_Function *draw_coordinate_center_push;
 Draw_Coordinate_Center_Pop_Function *draw_coordinate_center_pop;
 Get_Default_Font_For_View_Function *get_default_font_for_view;
+Text_Layout_Get_Buffer_Function *text_layout_get_buffer;
+Text_Layout_Compute_Cursor_Function *text_layout_compute_cursor;
+Text_Layout_Free_Function *text_layout_free;
 Compute_Render_Layout_Function *compute_render_layout;
 Draw_Render_Layout_Function *draw_render_layout;
 Open_Color_Picker_Function *open_color_picker;
@@ -696,6 +705,9 @@ Draw_Clip_Pop_Function *draw_clip_pop_;
 Draw_Coordinate_Center_Push_Function *draw_coordinate_center_push_;
 Draw_Coordinate_Center_Pop_Function *draw_coordinate_center_pop_;
 Get_Default_Font_For_View_Function *get_default_font_for_view_;
+Text_Layout_Get_Buffer_Function *text_layout_get_buffer_;
+Text_Layout_Compute_Cursor_Function *text_layout_compute_cursor_;
+Text_Layout_Free_Function *text_layout_free_;
 Compute_Render_Layout_Function *compute_render_layout_;
 Draw_Render_Layout_Function *draw_render_layout_;
 Open_Color_Picker_Function *open_color_picker_;
@@ -880,6 +892,9 @@ app_links->draw_clip_pop_ = Draw_Clip_Pop;\
 app_links->draw_coordinate_center_push_ = Draw_Coordinate_Center_Push;\
 app_links->draw_coordinate_center_pop_ = Draw_Coordinate_Center_Pop;\
 app_links->get_default_font_for_view_ = Get_Default_Font_For_View;\
+app_links->text_layout_get_buffer_ = Text_Layout_Get_Buffer;\
+app_links->text_layout_compute_cursor_ = Text_Layout_Compute_Cursor;\
+app_links->text_layout_free_ = Text_Layout_Free;\
 app_links->compute_render_layout_ = Compute_Render_Layout;\
 app_links->draw_render_layout_ = Draw_Render_Layout;\
 app_links->open_color_picker_ = Open_Color_Picker;\
@@ -1056,7 +1071,10 @@ static f32_Rect draw_clip_pop(Application_Links *app){return(app->draw_clip_pop(
 static void draw_coordinate_center_push(Application_Links *app, Vec2 point){(app->draw_coordinate_center_push(app, point));}
 static Vec2 draw_coordinate_center_pop(Application_Links *app){return(app->draw_coordinate_center_pop(app));}
 static Face_ID get_default_font_for_view(Application_Links *app, View_ID view_id){return(app->get_default_font_for_view(app, view_id));}
-static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, i32 buffer_line_number, f32 y_pixel_shift, f32 scroll_x, Range *on_screen_range_out){return(app->compute_render_layout(app, view_id, buffer_id, screen_rect, buffer_line_number, y_pixel_shift, scroll_x, on_screen_range_out));}
+static b32 text_layout_get_buffer(Application_Links *app, Text_Layout_ID text_layout_id, Buffer_ID *buffer_id_out){return(app->text_layout_get_buffer(app, text_layout_id, buffer_id_out));}
+static b32 text_layout_compute_cursor(Application_Links *app, Text_Layout_ID text_layout_id, Vec2 p, b32 round_down, Full_Cursor *cursor_out){return(app->text_layout_compute_cursor(app, text_layout_id, p, round_down, cursor_out));}
+static b32 text_layout_free(Application_Links *app, Text_Layout_ID text_layout_id){return(app->text_layout_free(app, text_layout_id));}
+static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, Buffer_Point buffer_point, Range *on_screen_range_out, Text_Layout_ID *text_layout_id_out){return(app->compute_render_layout(app, view_id, buffer_id, screen_rect, buffer_point, on_screen_range_out, text_layout_id_out));}
 static void draw_render_layout(Application_Links *app, View_ID view_id){(app->draw_render_layout(app, view_id));}
 static void open_color_picker(Application_Links *app, color_picker *picker){(app->open_color_picker(app, picker));}
 static void animate_in_n_milliseconds(Application_Links *app, u32 n){(app->animate_in_n_milliseconds(app, n));}
@@ -1232,7 +1250,10 @@ static f32_Rect draw_clip_pop(Application_Links *app){return(app->draw_clip_pop_
 static void draw_coordinate_center_push(Application_Links *app, Vec2 point){(app->draw_coordinate_center_push_(app, point));}
 static Vec2 draw_coordinate_center_pop(Application_Links *app){return(app->draw_coordinate_center_pop_(app));}
 static Face_ID get_default_font_for_view(Application_Links *app, View_ID view_id){return(app->get_default_font_for_view_(app, view_id));}
-static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, i32 buffer_line_number, f32 y_pixel_shift, f32 scroll_x, Range *on_screen_range_out){return(app->compute_render_layout_(app, view_id, buffer_id, screen_rect, buffer_line_number, y_pixel_shift, scroll_x, on_screen_range_out));}
+static b32 text_layout_get_buffer(Application_Links *app, Text_Layout_ID text_layout_id, Buffer_ID *buffer_id_out){return(app->text_layout_get_buffer_(app, text_layout_id, buffer_id_out));}
+static b32 text_layout_compute_cursor(Application_Links *app, Text_Layout_ID text_layout_id, Vec2 p, b32 round_down, Full_Cursor *cursor_out){return(app->text_layout_compute_cursor_(app, text_layout_id, p, round_down, cursor_out));}
+static b32 text_layout_free(Application_Links *app, Text_Layout_ID text_layout_id){return(app->text_layout_free_(app, text_layout_id));}
+static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, Buffer_Point buffer_point, Range *on_screen_range_out, Text_Layout_ID *text_layout_id_out){return(app->compute_render_layout_(app, view_id, buffer_id, screen_rect, buffer_point, on_screen_range_out, text_layout_id_out));}
 static void draw_render_layout(Application_Links *app, View_ID view_id){(app->draw_render_layout_(app, view_id));}
 static void open_color_picker(Application_Links *app, color_picker *picker){(app->open_color_picker_(app, picker));}
 static void animate_in_n_milliseconds(Application_Links *app, u32 n){(app->animate_in_n_milliseconds_(app, n));}

4ed.cpp

@@ -869,8 +869,9 @@ App_Init_Sig(app_init){
     models->working_set.default_display_width = DEFAULT_DISPLAY_WIDTH;
     models->working_set.default_minimum_base_display_width = DEFAULT_MINIMUM_BASE_DISPLAY_WIDTH;
     
-    // NOTE(allen): history setup
+    // NOTE(allen): 
     global_history_init(&models->global_history);
+    text_layout_init(&models->app_links, &models->text_layouts);
     
     // NOTE(allen): clipboard setup
     models->working_set.clipboard_max_size = ArrayCount(models->working_set.clipboards);

4ed_api_implementation.cpp

@@ -2402,7 +2402,6 @@ DOC_SEE(Full_Cursor)
     b32 result = false;
     if (view_api_check_view(view)){
         Editing_File *file = view->file;
-        Assert(file != 0);
         if (buffer_api_check_file(file)){
             if (file->settings.unwrapped_lines && seek.type == buffer_seek_wrapped_xy){
                 seek.type = buffer_seek_unwrapped_xy;
@@ -4634,7 +4633,49 @@ Get_Default_Font_For_View(Application_Links *app, View_ID view_id)
 }
 
 API_EXPORT b32
-Compute_Render_Layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, i32 buffer_line_number, f32 y_pixel_shift, f32 scroll_x, Range *on_screen_range_out){
+Text_Layout_Get_Buffer(Application_Links *app, Text_Layout_ID text_layout_id, Buffer_ID *buffer_id_out){
+    Models *models = (Models*)app->cmd_context;
+    Text_Layout layout = {};
+    b32 result = false;
+    if (text_layout_get(&models->text_layouts, text_layout_id, &layout)){
+        *buffer_id_out = layout.buffer_id;
+        result = true;
+    }
+    return(result);
+}
+
+API_EXPORT b32
+Text_Layout_Compute_Cursor(Application_Links *app, Text_Layout_ID text_layout_id, Vec2 p, b32 round_down, Full_Cursor *cursor_out){
+    Models *models = (Models*)app->cmd_context;
+    Text_Layout layout = {};
+    b32 result = false;
+    if (text_layout_get(&models->text_layouts, text_layout_id, &layout)){
+        Editing_File *file = imp_get_file(models, layout.buffer_id);
+        if (buffer_api_check_file(file)){
+            System_Functions *system = models->system;
+            Full_Cursor top = file_compute_cursor(system, file, seek_line_char(layout.point.line_number, 1));
+            f32 top_y = top.wrapped_y;
+            if (file->settings.unwrapped_lines){
+                top_y = top.unwrapped_y;
+            }
+            p += layout.point.pixel_shift;
+            p.y += top_y;
+            Buffer_Seek seek = seek_xy(p.x, p.y, round_down, file->settings.unwrapped_lines);
+            *cursor_out = file_compute_cursor(system, file, seek);
+            result = true;
+        }
+    }
+    return(result);
+}
+
+API_EXPORT b32
+Text_Layout_Free(Application_Links *app, Text_Layout_ID text_layout_id){
+    Models *models = (Models*)app->cmd_context;
+    return(text_layout_erase(&models->text_layouts, text_layout_id));
+}
+
+API_EXPORT b32
+Compute_Render_Layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 screen_rect, Buffer_Point buffer_point, Range *on_screen_range_out, Text_Layout_ID *text_layout_id_out){
     Models *models = (Models*)app->cmd_context;
     System_Functions *system = models->system;
     View *view = imp_get_view(models, view_id);
@@ -4672,8 +4713,9 @@ Compute_Render_Layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_
         
         Full_Cursor render_cursor = view_get_render_cursor(system, view);
 #else
-        Full_Cursor intermediate_cursor = file_compute_cursor(system, file, seek_line_char(buffer_line_number, 1));
+        Full_Cursor intermediate_cursor = file_compute_cursor(system, file, seek_line_char(buffer_point.line_number, 1));
-        f32 scroll_y = intermediate_cursor.unwrapped_y + y_pixel_shift;
+        f32 scroll_x = buffer_point.pixel_shift.x;
+        f32 scroll_y = intermediate_cursor.unwrapped_y + buffer_point.pixel_shift.y;
         Full_Cursor render_cursor = view_get_render_cursor(system, view, scroll_y);
 #endif
 
@@ -4755,7 +4797,12 @@ Compute_Render_Layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_
         view->render.items = items;
         view->render.item_count = item_count;
         
-        *on_screen_range_out = range;
+        if (on_screen_range_out != 0){
+            *on_screen_range_out = range;
+        }
+        if (text_layout_id_out != 0){
+            *text_layout_id_out = text_layout_new(&models->mem.heap, &models->text_layouts, buffer_id, buffer_point);
+        }
     }
     return(result);
 }

4ed_app_models.h

@@ -70,6 +70,7 @@ struct Models{
     Live_Views live_set;
     Parse_Context_Memory parse_context_memory;
     Global_History global_history;
+    Text_Layout_Container text_layouts;
     
     Dynamic_Variable_Layout variable_layout;
     Dynamic_Workspace dynamic_workspace;

4ed_app_target.cpp

@@ -62,6 +62,7 @@ struct Mem_Options{
 #include "4ed_layout.h"
 #include "4ed_view.h"
 #include "4ed_edit.h"
+#include "4ed_text_layout.h"
 #include "4ed_app_models.h"
 
 #include "4ed_mem.cpp"
@@ -89,6 +90,7 @@ struct Mem_Options{
 #include "4ed_view.cpp"
 #include "4ed_edit.cpp"
 #include "4ed_view_ui.cpp"
+#include "4ed_text_layout.cpp"
 #include "4ed.cpp"
 
 // BOTTOM

4ed_text_layout.cpp

@@ -0,0 +1,65 @@
+/*
+ * Mr. 4th Dimention - Allen Webster
+ *
+ * 31.03.2019
+ *
+ * Text layout representation
+ *
+ */
+
+// TOP
+
+internal void
+text_layout_init(Application_Links *app, Text_Layout_Container *container){
+    block_zero_struct(container);
+    container->node_arena = make_arena(app);
+}
+
+internal Text_Layout*
+text_layout_new__alloc_layout(Text_Layout_Container *container){
+    Text_Layout_Node *node = container->free_nodes;
+    if (node == 0){
+        node = push_array(&container->node_arena, Text_Layout_Node, 1);
+    }
+    else{
+        container->free_nodes = node->next;
+    }
+    return(&node->layout);
+}
+
+internal Text_Layout_ID
+text_layout_new(Heap *heap, Text_Layout_Container *container, Buffer_ID buffer_id, Buffer_Point point){
+    Text_Layout *new_layout_data = text_layout_new__alloc_layout(container);
+    new_layout_data->buffer_id = buffer_id;
+    new_layout_data->point = point;
+    Text_Layout_ID new_id = ++container->id_counter;
+    insert_u32_Ptr_table(heap, &container->table, new_id, new_layout_data);
+    return(new_id);
+}
+
+internal b32
+text_layout_get(Text_Layout_Container *container, Text_Layout_ID id, Text_Layout *out){
+    b32 result = false;
+    void *ptr = 0;
+    if (lookup_u32_Ptr_table(&container->table, id, &ptr)){
+        block_copy(out, ptr, sizeof(*out));
+        result = true;
+    }
+    return(result);
+}
+
+internal b32
+text_layout_erase(Text_Layout_Container *container, Text_Layout_ID id){
+    b32 result = false;
+    void *ptr = 0;
+    if (lookup_u32_Ptr_table(&container->table, id, &ptr)){
+        erase_u32_Ptr_table(&container->table, id);
+        Text_Layout_Node *node = CastFromMember(Text_Layout_Node, layout, ptr);
+        node->next = container->free_nodes;
+        container->free_nodes = node;
+        result = true;
+    }
+    return(result);
+}
+
+// BOTTOM

4ed_text_layout.h

@@ -3,7 +3,7 @@
  *
  * 31.03.2019
  *
- * Implementation of the API functions.
+ * Text layout representation
  *
  */
 
@@ -20,8 +20,19 @@ struct Text_Layout{
     // this just stores the parameters that should be handed to any
     // system that attempts to query the layout for hit testing.
     Buffer_ID buffer_id;
-    i32 line;
+    Buffer_Point point;
-    Vec2 pixel_shift;
+};
+
+union Text_Layout_Node{
+    Text_Layout_Node *next;
+    Text_Layout layout;
+};
+
+struct Text_Layout_Container{
+    Arena node_arena;
+    Text_Layout_Node *free_nodes;
+    u32_Ptr_Table table;
+    u32 id_counter;
 };
 
 #endif