mirror of
https://github.com/reactos/reactos.git
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ebe3d5273e
- Improve the scrolling support for bitmaps, DIBs and text formats. This completes the work started in CORE-10679 by Ricardo Hanke. Includes scrolling with the keyboard and the mouse wheel. - Add support for the CF_DSP* clipboard formats, as well as CF_TEXT and CF_OEMTEXT. - Add support for owner-display clipboard format CF_OWNERDISPLAY. - Realize any palette found in the clipboard (CF_PALETTE) before displaying the clipboard data format we want. - Remove dead code. - Update the file headers.
373 lines
10 KiB
C
373 lines
10 KiB
C
/*
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* PROJECT: ReactOS Clipboard Viewer
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* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
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* PURPOSE: Clipboard helper functions.
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* COPYRIGHT: Copyright 2015-2018 Ricardo Hanke
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* Copyright 2015-2018 Hermes Belusca-Maito
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*/
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#include "precomp.h"
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LRESULT
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SendClipboardOwnerMessage(
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IN BOOL bUnicode,
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IN UINT uMsg,
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IN WPARAM wParam,
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IN LPARAM lParam)
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{
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HWND hwndOwner;
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hwndOwner = GetClipboardOwner();
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if (!hwndOwner)
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return GetLastError();
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if (bUnicode)
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return SendMessageW(hwndOwner, uMsg, wParam, lParam);
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else
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return SendMessageA(hwndOwner, uMsg, wParam, lParam);
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}
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static int
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GetPredefinedClipboardFormatName(HINSTANCE hInstance,
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UINT uFormat,
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BOOL Unicode,
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PVOID lpszFormat,
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UINT cch)
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{
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static
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struct FORMAT_NAME
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{
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UINT uFormat;
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UINT uResID;
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} uFormatList[] = {
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/* Table sorted in increasing order of CF_xxx values, please keep it this way! */
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{CF_TEXT , STRING_CF_TEXT }, // 1
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{CF_BITMAP , STRING_CF_BITMAP }, // 2
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{CF_METAFILEPICT, STRING_CF_METAFILEPICT}, // 3
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{CF_SYLK , STRING_CF_SYLK }, // 4
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{CF_DIF , STRING_CF_DIF }, // 5
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{CF_TIFF , 0/*STRING_CF_TIFF*/ }, // 6
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{CF_OEMTEXT , STRING_CF_OEMTEXT }, // 7
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{CF_DIB , STRING_CF_DIB }, // 8
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{CF_PALETTE , STRING_CF_PALETTE }, // 9
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{CF_PENDATA , 0/*STRING_CF_PENDATA*/ }, // 10
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{CF_RIFF , 0/*STRING_CF_RIFF*/ }, // 11
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{CF_WAVE , 0/*STRING_CF_WAVE*/ }, // 12
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{CF_UNICODETEXT , STRING_CF_UNICODETEXT }, // 13
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{CF_ENHMETAFILE , STRING_CF_ENHMETAFILE }, // 14
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#if(WINVER >= 0x0400)
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{CF_HDROP , STRING_CF_HDROP }, // 15
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{CF_LOCALE , STRING_CF_LOCALE }, // 16
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#endif
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#if(WINVER >= 0x0500)
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{CF_DIBV5 , STRING_CF_DIBV5 }, // 17
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#endif
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};
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switch (uFormat)
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{
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case CF_TEXT: case CF_BITMAP: case CF_METAFILEPICT:
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case CF_SYLK: case CF_DIF: // case CF_TIFF:
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case CF_OEMTEXT: case CF_DIB: case CF_PALETTE:
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// case CF_PENDATA: // case CF_RIFF: // case CF_WAVE:
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case CF_UNICODETEXT: case CF_ENHMETAFILE:
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#if(WINVER >= 0x0400)
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case CF_HDROP: case CF_LOCALE:
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#endif
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#if(WINVER >= 0x0500)
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case CF_DIBV5:
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#endif
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{
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if (Unicode)
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return LoadStringW(hInstance, uFormatList[uFormat-1].uResID, (LPWSTR)lpszFormat, cch);
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else
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return LoadStringA(hInstance, uFormatList[uFormat-1].uResID, (LPSTR)lpszFormat, cch);
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}
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default:
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{
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return 0;
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}
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}
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}
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void
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RetrieveClipboardFormatName(HINSTANCE hInstance,
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UINT uFormat,
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BOOL Unicode,
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PVOID lpszFormat,
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UINT cch)
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{
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ZeroMemory(lpszFormat, cch * (Unicode ? sizeof(WCHAR) : sizeof(CHAR)));
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/* Check for predefined clipboard format */
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if (GetPredefinedClipboardFormatName(hInstance, uFormat, Unicode, lpszFormat, cch) != 0)
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return;
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/* Check for owner-display format */
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if (uFormat == CF_OWNERDISPLAY)
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{
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if (SendClipboardOwnerMessage(Unicode, WM_ASKCBFORMATNAME,
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(WPARAM)cch, (LPARAM)lpszFormat) != 0)
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{
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if (Unicode)
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LoadStringW(hInstance, STRING_CF_UNKNOWN, (LPWSTR)lpszFormat, cch);
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else
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LoadStringA(hInstance, STRING_CF_UNKNOWN, (LPSTR)lpszFormat, cch);
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}
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return;
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}
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/* Fallback to registered clipboard format */
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if (Unicode)
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{
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if (!GetClipboardFormatNameW(uFormat, (LPWSTR)lpszFormat, cch))
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LoadStringW(hInstance, STRING_CF_UNKNOWN, (LPWSTR)lpszFormat, cch);
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}
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else
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{
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if (!GetClipboardFormatNameA(uFormat, (LPSTR)lpszFormat, cch))
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LoadStringA(hInstance, STRING_CF_UNKNOWN, (LPSTR)lpszFormat, cch);
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}
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}
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void DeleteClipboardContent(void)
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{
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if (!OpenClipboard(Globals.hMainWnd))
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{
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ShowLastWin32Error(Globals.hMainWnd);
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return;
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}
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if (!EmptyClipboard())
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{
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ShowLastWin32Error(Globals.hMainWnd);
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}
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CloseClipboard();
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}
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UINT GetAutomaticClipboardFormat(void)
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{
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static UINT uFormatList[] =
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{
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CF_OWNERDISPLAY,
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CF_UNICODETEXT,
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CF_TEXT,
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CF_OEMTEXT,
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CF_ENHMETAFILE,
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CF_METAFILEPICT,
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CF_DIBV5,
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CF_DIB,
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CF_BITMAP,
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CF_DSPTEXT,
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CF_DSPBITMAP,
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CF_DSPMETAFILEPICT,
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CF_DSPENHMETAFILE,
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CF_PALETTE
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};
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return GetPriorityClipboardFormat(uFormatList, ARRAYSIZE(uFormatList));
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}
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BOOL IsClipboardFormatSupported(UINT uFormat)
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{
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switch (uFormat)
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{
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case CF_OWNERDISPLAY:
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case CF_UNICODETEXT:
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case CF_TEXT:
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case CF_OEMTEXT:
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case CF_BITMAP:
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case CF_ENHMETAFILE:
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case CF_METAFILEPICT:
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case CF_DIB:
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case CF_DIBV5:
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case CF_HDROP:
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{
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return TRUE;
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}
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default:
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{
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return FALSE;
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}
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}
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}
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SIZE_T
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GetLineExtentW(
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IN LPCWSTR lpText,
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OUT LPCWSTR* lpNextLine)
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{
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LPCWSTR ptr;
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/* Find the next line of text (lpText is NULL-terminated) */
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/* For newlines, focus only on '\n', not on '\r' */
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ptr = wcschr(lpText, L'\n'); // Find the end of this line.
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if (ptr)
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{
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/* We have the end of this line, go to the next line (ignore the endline in the count) */
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*lpNextLine = ptr + 1;
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}
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else
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{
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/* This line was the last one, go pointing to the terminating NULL */
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ptr = lpText + wcslen(lpText);
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*lpNextLine = ptr;
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}
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return (ptr - lpText);
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}
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SIZE_T
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GetLineExtentA(
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IN LPCSTR lpText,
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OUT LPCSTR* lpNextLine)
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{
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LPCSTR ptr;
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/* Find the next line of text (lpText is NULL-terminated) */
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/* For newlines, focus only on '\n', not on '\r' */
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ptr = strchr(lpText, '\n'); // Find the end of this line.
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if (ptr)
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{
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/* We have the end of this line, go to the next line (ignore the endline in the count) */
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*lpNextLine = ptr + 1;
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}
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else
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{
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/* This line was the last one, go pointing to the terminating NULL */
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ptr = lpText + strlen(lpText);
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*lpNextLine = ptr;
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}
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return (ptr - lpText);
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}
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BOOL GetClipboardDataDimensions(UINT uFormat, PRECT pRc)
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{
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SetRectEmpty(pRc);
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if (!OpenClipboard(Globals.hMainWnd))
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{
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return FALSE;
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}
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switch (uFormat)
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{
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case CF_DSPBITMAP:
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case CF_BITMAP:
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{
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HBITMAP hBitmap;
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BITMAP bmp;
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hBitmap = (HBITMAP)GetClipboardData(CF_BITMAP);
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GetObjectW(hBitmap, sizeof(bmp), &bmp);
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SetRect(pRc, 0, 0, bmp.bmWidth, bmp.bmHeight);
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break;
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}
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case CF_DIB:
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case CF_DIBV5:
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{
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HGLOBAL hGlobal;
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LPBITMAPINFOHEADER lpInfoHeader;
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hGlobal = GetClipboardData(uFormat);
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if (!hGlobal)
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break;
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lpInfoHeader = GlobalLock(hGlobal);
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if (!lpInfoHeader)
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break;
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if (lpInfoHeader->biSize == sizeof(BITMAPCOREHEADER))
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{
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LPBITMAPCOREHEADER lpCoreHeader = (LPBITMAPCOREHEADER)lpInfoHeader;
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SetRect(pRc, 0, 0,
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lpCoreHeader->bcWidth,
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lpCoreHeader->bcHeight);
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}
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else if ((lpInfoHeader->biSize == sizeof(BITMAPINFOHEADER)) ||
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(lpInfoHeader->biSize == sizeof(BITMAPV4HEADER)) ||
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(lpInfoHeader->biSize == sizeof(BITMAPV5HEADER)))
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{
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SetRect(pRc, 0, 0,
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lpInfoHeader->biWidth,
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/* NOTE: biHeight < 0 for bottom-up DIBs, or > 0 for top-down DIBs */
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(lpInfoHeader->biHeight > 0) ? lpInfoHeader->biHeight
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: -lpInfoHeader->biHeight);
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}
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else
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{
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/* Invalid format */
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}
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GlobalUnlock(hGlobal);
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break;
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}
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case CF_DSPTEXT:
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case CF_TEXT:
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case CF_OEMTEXT:
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case CF_UNICODETEXT:
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{
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HDC hDC;
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HGLOBAL hGlobal;
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PVOID lpText, ptr;
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DWORD dwSize;
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SIZE txtSize = {0, 0};
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SIZE_T lineSize;
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hGlobal = GetClipboardData(uFormat);
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if (!hGlobal)
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break;
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lpText = GlobalLock(hGlobal);
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if (!lpText)
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break;
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hDC = GetDC(Globals.hMainWnd);
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/* Find the size of the rectangle enclosing the text */
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for (;;)
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{
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if (uFormat == CF_UNICODETEXT)
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{
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if (*(LPCWSTR)lpText == UNICODE_NULL)
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break;
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lineSize = GetLineExtentW(lpText, (LPCWSTR*)&ptr);
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dwSize = GetTabbedTextExtentW(hDC, lpText, lineSize, 0, NULL);
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}
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else
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{
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if (*(LPCSTR)lpText == ANSI_NULL)
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break;
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lineSize = GetLineExtentA(lpText, (LPCSTR*)&ptr);
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dwSize = GetTabbedTextExtentA(hDC, lpText, lineSize, 0, NULL);
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}
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txtSize.cx = max(txtSize.cx, LOWORD(dwSize));
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txtSize.cy += HIWORD(dwSize);
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lpText = ptr;
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}
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ReleaseDC(Globals.hMainWnd, hDC);
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GlobalUnlock(hGlobal);
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SetRect(pRc, 0, 0, txtSize.cx, txtSize.cy);
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break;
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}
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default:
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{
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break;
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}
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}
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CloseClipboard();
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return TRUE;
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}
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