Implement the logging tab by reading the log file straight from disk.

win32/FireflyShell/LogPage.cpp

@@ -16,8 +16,94 @@
 
 #include "stdafx.h"
 #include "LogPage.h"
+#include "FireflyShell.h"
+#include "IniFile.h"
 
 LRESULT CLogPage::OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
 {
+	LoadLog();
 	return 0;
 }
+
+LRESULT CLogPage::OnRefresh(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
+{
+	LoadLog();
+	return 0;
+}
+
+void CLogPage::LoadLog()
+{
+	CWaitCursor wait;
+
+	const size_t MAX_LOG = 65000;
+
+	IniFile ini(GetApplication()->GetConfigPath());
+
+	CString filename = ini.GetString(_T("general"), _T("logfile"), _T(""));
+	if (filename.IsEmpty())
+	{
+		CString str;
+		str.LoadString(IDS_LOG_NOLOG);
+		GetDlgItem(IDC_LOG).SetWindowText(str);
+	}
+	else
+	{
+		FILE *fp = _tfopen(filename, _T("r"));
+		if (fp)
+		{
+			// Fathom the length
+			fseek(fp, 0, SEEK_END);
+			long len = ftell(fp);
+			if (len > MAX_LOG)
+			{
+				len = MAX_LOG;
+				fseek(fp, -len, SEEK_END);
+			}
+			else
+			{
+				fseek(fp, 0, SEEK_SET);
+			}
+
+			char *buffer = new char[len + 1];
+			size_t nread = fread(buffer, 1, len, fp);
+			ATLASSERT(nread < MAX_LOG);
+			buffer[nread] = 0;
+			fclose(fp);
+
+			// Normalise the line endings. Not particularly efficient but
+			// it does work. It would be nice if we could cheaply tell
+			// CString to preallocate a certain size.
+			CString log(_T("Log file: "));
+			log += filename;
+			log += _T("\r\n\r\n");
+
+			size_t n = 0;
+			while (n < nread)
+			{
+				switch (buffer[n])
+				{
+				case '\r':
+					// Ignore
+					break;
+				case '\n':
+					log += _T("\r\n");
+					break;
+				default:
+					log += buffer[n];
+					break;
+				}
+				++n;
+			}
+
+			GetDlgItem(IDC_LOG).SetWindowText(log);
+			delete []buffer;
+		}
+		else
+		{
+			CString str;
+			str.Format(IDS_LOG_OPENFAILED, filename);
+			GetDlgItem(IDC_LOG).SetWindowText(str);
+		}
+	}
+}
+