mirror of https://github.com/odrling/Aegisub
347 lines
10 KiB
C#
347 lines
10 KiB
C#
using System;
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using System.Collections;
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using System.Windows.Forms;
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using System.Data;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Drawing;
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public enum EncodingType {
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//UTF8=0,
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//UTF8WithPreamble,
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//Unicode,
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//Ansi
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ANSI,
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BigEndianUnicode,
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Unicode,
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UTF8,
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Shift_JIS
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};
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public class SaveFileDialogWithEncoding {
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private delegate int OFNHookProcDelegate(int hdlg, int msg, int wParam, int lParam);
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private int m_LabelHandle=0;
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private int m_ComboHandle=0;
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private string m_Filter="";
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private string m_DefaultExt="";
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private string m_FileName="";
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private EncodingType m_EncodingType;
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private Screen m_ActiveScreen;
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[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
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private struct OPENFILENAME {
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public int lStructSize;
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public IntPtr hwndOwner;
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public int hInstance;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrFilter;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrCustomFilter;
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public int nMaxCustFilter;
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public int nFilterIndex;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrFile;
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public int nMaxFile;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrFileTitle;
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public int nMaxFileTitle;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrInitialDir;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrTitle;
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public int Flags;
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public short nFileOffset;
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public short nFileExtension;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpstrDefExt;
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public int lCustData;
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public OFNHookProcDelegate lpfnHook;
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[MarshalAs(UnmanagedType.LPTStr)] public string lpTemplateName;
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//only if on nt 5.0 or higher
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public int pvReserved;
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public int dwReserved;
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public int FlagsEx;
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}
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[DllImport("Comdlg32.dll", CharSet=CharSet.Auto, SetLastError=true)]
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private static extern bool GetSaveFileName(ref OPENFILENAME lpofn);
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[DllImport("Comdlg32.dll")]
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private static extern int CommDlgExtendedError();
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[DllImport("user32.dll")]
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private static extern bool SetWindowPos(int hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
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private struct RECT {
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public int Left;
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public int Top;
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public int Right;
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public int Bottom;
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}
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private struct POINT {
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public int X;
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public int Y;
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}
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private struct NMHDR {
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public int HwndFrom;
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public int IdFrom;
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public int Code;
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}
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[DllImport("user32.dll")]
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private static extern bool GetWindowRect(int hWnd, ref RECT lpRect);
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[DllImport("user32.dll")]
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private static extern int GetParent(int hWnd);
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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private static extern bool SetWindowText(int hWnd, string lpString);
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[DllImport("user32.dll")]
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private static extern int SendMessage(int hWnd, int Msg, int wParam, int lParam);
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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private static extern int SendMessage(int hWnd, int Msg, int wParam, string lParam);
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[DllImport("user32.dll")]
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private static extern bool DestroyWindow(int hwnd);
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private const int OFN_ENABLEHOOK=0x00000020;
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private const int OFN_EXPLORER=0x00080000;
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private const int OFN_FILEMUSTEXIST=0x00001000;
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private const int OFN_HIDEREADONLY=0x00000004;
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private const int OFN_CREATEPROMPT=0x00002000;
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private const int OFN_NOTESTFILECREATE=0x00010000;
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private const int OFN_OVERWRITEPROMPT=0x00000002;
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private const int OFN_PATHMUSTEXIST=0x00000800;
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private const int SWP_NOSIZE=0x0001;
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private const int SWP_NOMOVE=0x0002;
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private const int SWP_NOZORDER=0x0004;
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private const int WM_INITDIALOG=0x110;
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private const int WM_DESTROY=0x2;
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private const int WM_SETFONT=0x0030;
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private const int WM_GETFONT=0x0031;
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private const int CBS_DROPDOWNLIST=0x0003;
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private const int CBS_HASSTRINGS=0x0200;
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private const int CB_ADDSTRING=0x0143;
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private const int CB_SETCURSEL=0x014E;
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private const int CB_GETCURSEL=0x0147;
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private const uint WS_VISIBLE=0x10000000;
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private const uint WS_CHILD=0x40000000;
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private const uint WS_TABSTOP=0x00010000;
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private const int CDN_FILEOK=-606;
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private const int WM_NOTIFY=0x004E;
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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private static extern int GetDlgItem(int hDlg, int nIDDlgItem);
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[DllImport("user32.dll", CharSet=CharSet.Auto)]
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private static extern int CreateWindowEx(int dwExStyle, string lpClassName, string lpWindowName, uint dwStyle, int x, int y, int nWidth, int nHeight, int hWndParent, int hMenu, int hInstance, int lpParam);
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[DllImport("user32.dll")]
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private static extern bool ScreenToClient(int hWnd, ref POINT lpPoint);
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private int HookProc(int hdlg, int msg, int wParam, int lParam) {
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switch (msg) {
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case WM_INITDIALOG:
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//we need to centre the dialog
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Rectangle sr=m_ActiveScreen.Bounds;
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RECT cr=new RECT();
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int parent=GetParent(hdlg);
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GetWindowRect(parent, ref cr);
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int x=(sr.Right + sr.Left - (cr.Right-cr.Left))/2;
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int y=(sr.Bottom + sr.Top - (cr.Bottom-cr.Top))/2;
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SetWindowPos(parent, 0, x, y, cr.Right-cr.Left, cr.Bottom - cr.Top + 32, SWP_NOZORDER);
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//we need to find the label to position our new label under
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int fileTypeWindow=GetDlgItem(parent, 0x441);
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RECT aboveRect=new RECT();
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GetWindowRect(fileTypeWindow, ref aboveRect);
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//now convert the label's screen co-ordinates to client co-ordinates
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POINT point=new POINT();
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point.X=aboveRect.Left;
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point.Y=aboveRect.Bottom;
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ScreenToClient(parent, ref point);
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//create the label
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int labelHandle=CreateWindowEx(0, "STATIC", "mylabel", WS_VISIBLE | WS_CHILD | WS_TABSTOP, point.X, point.Y + 12, 200, 100, parent, 0, 0, 0);
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SetWindowText(labelHandle, "&Encoding:");
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int fontHandle=SendMessage(fileTypeWindow, WM_GETFONT, 0, 0);
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SendMessage(labelHandle, WM_SETFONT, fontHandle, 0);
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//we now need to find the combo-box to position the new combo-box under
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int fileComboWindow=GetDlgItem(parent, 0x470);
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aboveRect=new RECT();
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GetWindowRect(fileComboWindow, ref aboveRect);
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point=new POINT();
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point.X=aboveRect.Left;
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point.Y=aboveRect.Bottom;
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ScreenToClient(parent, ref point);
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POINT rightPoint=new POINT();
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rightPoint.X=aboveRect.Right;
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rightPoint.Y=aboveRect.Top;
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ScreenToClient(parent, ref rightPoint);
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//we create the new combobox
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int comboHandle=CreateWindowEx(0, "ComboBox", "mycombobox", WS_VISIBLE | WS_CHILD | CBS_HASSTRINGS | CBS_DROPDOWNLIST | WS_TABSTOP, point.X, point.Y + 8, rightPoint.X-point.X, 100, parent, 0, 0, 0);
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SendMessage(comboHandle, WM_SETFONT, fontHandle, 0);
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//and add the encodings we want to offer
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SendMessage(comboHandle, CB_ADDSTRING, 0, "ANSI");
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SendMessage(comboHandle, CB_ADDSTRING, 0, "BigEndianUnicode");
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SendMessage(comboHandle, CB_ADDSTRING, 0, "Unicode");
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SendMessage(comboHandle, CB_ADDSTRING, 0, "UTF-8");
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SendMessage(comboHandle, CB_ADDSTRING, 0, "SJIS");
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SendMessage(comboHandle, CB_SETCURSEL, (int)m_EncodingType, 0);
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//remember the handles of the controls we have created so we can destroy them after
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m_LabelHandle=labelHandle;
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m_ComboHandle=comboHandle;
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break;
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case WM_DESTROY:
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//destroy the handles we have created
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if (m_ComboHandle!=0) {
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DestroyWindow(m_ComboHandle);
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}
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if (m_LabelHandle!=0) {
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DestroyWindow(m_LabelHandle);
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}
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break;
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case WM_NOTIFY:
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//we need to intercept the CDN_FILEOK message
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//which is sent when the user selects a filename
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NMHDR nmhdr=(NMHDR)Marshal.PtrToStructure(new IntPtr(lParam), typeof(NMHDR));
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if (nmhdr.Code==CDN_FILEOK) {
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//a file has been selected
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//we need to get the encoding
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m_EncodingType=(EncodingType)SendMessage(m_ComboHandle, CB_GETCURSEL, 0, 0);
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}
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break;
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}
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return 0;
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}
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public string DefaultExt {
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get { return m_DefaultExt; }
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set { m_DefaultExt=value; }
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}
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public string Filter {
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get { return m_Filter; }
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set { m_Filter=value; }
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}
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public string FileName {
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get { return m_FileName; }
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set { m_FileName=value; }
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}
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public EncodingType EncodingType {
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get { return m_EncodingType; }
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set { m_EncodingType=value; }
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}
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public DialogResult ShowDialog(IntPtr ownerhwnd, Screen ownerscreen) {
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return ShowDialog(ownerhwnd,ownerscreen,"Unicode");
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}
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public DialogResult ShowDialog(IntPtr ownerhwnd, Screen ownerscreen, string encoding) {
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//m_EncodingType = stringToEncodingType(encoding);
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//set up the struct and populate it
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OPENFILENAME ofn=new OPENFILENAME();
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ofn.lStructSize= Marshal.SizeOf( ofn );
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ofn.lpstrFilter= m_Filter.Replace('|', '\0') + '\0';
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ofn.lpstrFile = m_FileName + new string(' ', 512);
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ofn.nMaxFile= ofn.lpstrFile.Length;
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ofn.lpstrFileTitle= System.IO.Path.GetFileName(m_FileName) + new string(' ', 512);
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ofn.nMaxFileTitle = ofn.lpstrFileTitle.Length;
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ofn.lpstrTitle= "Save file as";
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ofn.lpstrDefExt=m_DefaultExt;
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//position the dialog above the active window
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ofn.hwndOwner=ownerhwnd;
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//we need to find out the active screen so the dialog box is
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//centred on the correct display
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m_ActiveScreen=ownerscreen;
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//set up some sensible flags
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ofn.Flags=OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_NOTESTFILECREATE | OFN_ENABLEHOOK | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
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//this is where the hook is set. Note that we can use a C# delegate in place of a C function pointer
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ofn.lpfnHook=new OFNHookProcDelegate(HookProc);
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//if we're running on Windows 98/ME then the struct is smaller
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if (System.Environment.OSVersion.Platform!=PlatformID.Win32NT) {
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ofn.lStructSize-=12;
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}
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//show the dialog
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if (!GetSaveFileName(ref ofn)) {
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int ret=CommDlgExtendedError();
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if (ret!=0) {
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throw new ApplicationException("Couldn't show file open dialog - " + ret.ToString());
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}
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return DialogResult.Cancel;
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}
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m_FileName=ofn.lpstrFile;
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return DialogResult.OK;
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}
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public static System.Text.Encoding stringToEncodingType(string input) {
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unsafe {
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switch (input) {
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case "ASCII" : return System.Text.Encoding.ASCII;
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case "ANSI" : return System.Text.Encoding.GetEncoding(1252);
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case "BigEndianUnicode" : return System.Text.Encoding.BigEndianUnicode;
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case "SJIS" :
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case "Shift_JIS" : return System.Text.Encoding.GetEncoding("shift_jis");
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case "UTF8" :
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case "UTF-8" : return System.Text.Encoding.UTF8;
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case "Unicode" :
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default : return System.Text.Encoding.Unicode;
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}
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}
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}
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}
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