TerminalFont: add support for ConEmu

src/detection/terminalfont/terminalfont_windows.c

@@ -1,4 +1,5 @@
 #include "common/properties.h"
+#include "common/io.h"
 #include "detection/terminalshell/terminalshell.h"
 #include "terminalfont.h"
 
@@ -73,10 +74,64 @@ exit:
     RegCloseKey(hKey);
 }
 
+static void detectConEmu(const FFinstance* instance, FFTerminalFontResult* terminalFont)
+{
+    FF_UNUSED(instance)
+
+    //https://conemu.github.io/en/ConEmuXml.html#search-sequence
+    FFstrbuf path;
+    ffStrbufInit(&path);
+
+    FFstrbuf fontName;
+    ffStrbufInit(&fontName);
+
+    FFstrbuf fontSize;
+    ffStrbufInit(&fontSize);
+
+    const char* paths[] = { "ConEmuDir", "ConEmuBaseDir", "APPDATA" };
+    for (uint32_t i = 0; i < sizeof(paths) / sizeof(paths[0]); ++i)
+    {
+        ffStrbufSetS(&path, getenv(paths[i]));
+        if(path.length > 0)
+        {
+            ffStrbufAppendS(&path, "/ConEmu.xml");
+            if(ffParsePropFileValues(path.chars, 2, (FFpropquery[]){
+                {"<value name=\"FontName\" type=\"string\" data=\"", &fontName},
+                {"<value name=\"FontSize\" type=\"ulong\" data=\"", &fontSize}
+            }))
+                break;
+        }
+    }
+    ffStrbufDestroy(&path);
+
+    if(fontName.length == 0 && fontSize.length == 0)
+    {
+        ffStrbufAppendS(&terminalFont->error, "Failed to parse ConEmu.xml");
+        return;
+    }
+
+    if(fontName.length > 0)
+        ffStrbufSubstrBeforeLastC(&fontName, '"');
+    else
+        ffStrbufAppendS(&fontName, "Consola");
+
+    if(fontSize.length > 0)
+        ffStrbufSubstrBeforeLastC(&fontSize, '"');
+    else
+        ffStrbufAppendS(&fontSize, "14");
+
+    ffFontInitValues(&terminalFont->font, fontName.chars, fontSize.chars);
+
+    ffStrbufDestroy(&fontName);
+    ffStrbufDestroy(&fontSize);
+}
+
 void ffDetectTerminalFontPlatform(const FFinstance* instance, const FFTerminalShellResult* terminalShell, FFTerminalFontResult* terminalFont)
 {
     if(ffStrbufIgnCaseCompS(&terminalShell->terminalProcessName, "mintty") == 0)
         detectMintty(instance, terminalFont);
     else if(ffStrbufIgnCaseCompS(&terminalShell->terminalProcessName, "conhost.exe") == 0)
         detectConhost(instance, terminalFont);
+    else if(ffStrbufStartsWithIgnCaseS(&terminalShell->terminalProcessName, "ConEmuC"))
+        detectConEmu(instance, terminalFont);
 }