From a85ddda2a7d50bbe9194e7631a0393a8ba6bc81c Mon Sep 17 00:00:00 2001
From: Allen Webster <allenwebster@Allens-MBP.lan>
Date: Mon, 20 Nov 2017 15:05:14 -0500
Subject: [PATCH] Mac Italics and Bold

---
 platform_mac/mac_4ed.cpp                    | 31 +++++++++-
 platform_mac/mac_4ed.m                      | 64 +++++++++++++++++----
 platform_mac/osx_objective_c_to_cpp_links.h |  8 +++
 3 files changed, 92 insertions(+), 11 deletions(-)

diff --git a/platform_mac/mac_4ed.cpp b/platform_mac/mac_4ed.cpp
index 5d45916d..151020bf 100644
--- a/platform_mac/mac_4ed.cpp
+++ b/platform_mac/mac_4ed.cpp
@@ -338,7 +338,36 @@ global u32 system_font_method = SystemFontMethod_FilePath;
 
 internal
 Sys_Font_Path(name, parameters){
-    // TODO(allen)
+    b32 italic = (parameters != 0 && parameters->italics);
+    b32 bold = (parameters != 0 && parameters->bold);
+    i32 pt_size = 12;
+    if (parameters != 0){
+        pt_size = parameters->pt_size;
+    }
+    
+    OSX_Font_Match match = osx_get_font_match(name, pt_size, italic, bold);
+    
+    Font_Path path = {0};
+    if (match.path != 0){
+        Partition *part = &shared_vars.font_scratch;
+        path.temp = begin_temp_memory(part);
+        
+        i32 len = str_size(match.path);
+        char *buffer = push_array(part, char, len + 1);
+        if (buffer == 0){
+            sysshared_partition_grow(part, l_round_up_i32(len + 1, KB(4)));
+            buffer = push_array(part, char, len + 1);
+        }
+        
+        if (buffer != 0){
+            push_align(part, 8);
+            memcpy(buffer, match.path, len + 1);
+            path.len = len;
+            path.name = buffer;
+        }
+    }
+    
+    return(path);
 }
 
 Sys_Font_Data_Not_Used;
diff --git a/platform_mac/mac_4ed.m b/platform_mac/mac_4ed.m
index 3f3f02d6..7ee6f6ed 100644
--- a/platform_mac/mac_4ed.m
+++ b/platform_mac/mac_4ed.m
@@ -726,6 +726,8 @@ osx_timer_seconds(void){
     return(result);
 }
 
+NSFontManager *font_manager = 0;
+
 NSString *get_font_path(NSFont *font){
     CFStringRef name = (CFStringRef)[font fontName];
     CGFloat size = [font pointSize];
@@ -735,9 +737,60 @@ NSString *get_font_path(NSFont *font){
     return(path);
 }
 
+OSX_Font_Match
+osx_get_font_match(char *name, i32 pt_size, b32 italic, b32 bold){
+    if (font_manager == 0){
+        font_manager = [NSFontManager sharedFontManager];
+    }
+    
+    NSString *name_string = [NSString stringWithUTF8String:name];
+    NSFontTraitMask trait_mask = 0;
+    if (italic){
+        trait_mask = (trait_mask | NSItalicFontMask);
+    }
+    NSInteger weight = 5;
+    if (bold){
+        weight = 9;
+    }
+    
+    b32 used_base_file = false;
+    NSFont *font = [font_manager
+            fontWithFamily: name_string
+            traits: trait_mask
+            weight: weight
+            size:(float)pt_size];
+    
+    if (font == nil){
+        font = [font_manager
+                fontWithFamily: name_string
+                traits: 0
+                weight: 5
+                size:(float)pt_size];
+        used_base_file = true;
+    }
+    
+    OSX_Font_Match match = {0};
+    if (font != nil){
+        NSString *path = get_font_path(font);
+        char *path_c = 0;
+        if (path != nil){
+            path_c = (char*)[path UTF8String];
+        }
+        if (path_c != 0){
+            match.path = path_c;
+            match.used_base_file = used_base_file;
+        }
+    }
+    
+    return(match);
+}
+
 OSX_Loadable_Fonts
 osx_list_loadable_fonts(void){
-    NSFontManager *font_manager = [NSFontManager sharedFontManager];
+    if (font_manager == 0){
+        font_manager = [NSFontManager sharedFontManager];
+    }
+    
     NSArray<NSString*> *fonts = [font_manager availableFontFamilies];
     
     OSX_Loadable_Fonts result = {0};
@@ -768,15 +821,6 @@ osx_list_loadable_fonts(void){
         result.paths[i] = path_c;
     }
     
-#if 0
-    for (int i = 0; i < count; ++i){
-        char *name = result.names[i];
-        char *path = result.paths[i];
-        fprintf(stdout, "found: %s\nat: %s\n", name, path);
-        fflush(stdout);
-    }
-#endif
-    
     return(result);
 }
 
diff --git a/platform_mac/osx_objective_c_to_cpp_links.h b/platform_mac/osx_objective_c_to_cpp_links.h
index 31f8069f..92f9f5f9 100644
--- a/platform_mac/osx_objective_c_to_cpp_links.h
+++ b/platform_mac/osx_objective_c_to_cpp_links.h
@@ -62,6 +62,11 @@ typedef struct OSX_Loadable_Fonts{
     i32 count;
 } OSX_Loadable_Fonts;
 
+typedef struct OSX_Font_Match{
+    char *path;
+    b32 used_base_file;
+} OSX_Font_Match;
+
 // In C++ layer.
 extern OSX_Objective_C_Vars osx_objc;
 
@@ -135,6 +140,9 @@ osx_close_app(void);
 external f32
 osx_timer_seconds(void);
 
+external OSX_Font_Match
+osx_get_font_match(char *name, i32 pt_size, b32 italic, b32 bold);
+
 external OSX_Loadable_Fonts
 osx_list_loadable_fonts(void);