mirror of
https://github.com/vim/vim
synced 2025-03-15 22:37:52 +01:00
Problem: Code is indented more than necessary. Solution: Use an early return where it makes sense. (Yegappan Lakshmanan, closes #11887)
774 lines
19 KiB
C
774 lines
19 KiB
C
/* vi:set ts=8 sts=4 sw=4 noet:
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*
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* VIM - Vi IMproved by Bram Moolenaar
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*
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* Do ":help uganda" in Vim to read copying and usage conditions.
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* Do ":help credits" in Vim to see a list of people who contributed.
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* See README.txt for an overview of the Vim source code.
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*/
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/*
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* winclip.c
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*
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* Routines for Win32 clipboard handling.
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* Also used by Cygwin, using os_unix.c.
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*/
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#include "vim.h"
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/*
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* Compile only the clipboard handling features when compiling for cygwin
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* posix environment.
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*/
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#ifdef FEAT_CYGWIN_WIN32_CLIPBOARD
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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# include "winclip.pro"
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#endif
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/*
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* When generating prototypes for Win32 on Unix, these lines make the syntax
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* errors disappear. They do not need to be correct.
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*/
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#ifdef PROTO
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#define WINAPI
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#define WINBASEAPI
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typedef int DWORD;
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typedef int LPBOOL;
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typedef int LPCSTR;
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typedef int LPCWSTR;
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typedef int LPSTR;
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typedef int LPWSTR;
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typedef int UINT;
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#endif
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/*
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* Convert an UTF-8 string to UTF-16.
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* "instr[inlen]" is the input. "inlen" is in bytes.
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* When "outstr" is NULL only return the number of UTF-16 words produced.
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* Otherwise "outstr" must be a buffer of sufficient size.
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* Returns the number of UTF-16 words produced.
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*/
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int
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utf8_to_utf16(char_u *instr, int inlen, short_u *outstr, int *unconvlenp)
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{
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int outlen = 0;
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char_u *p = instr;
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int todo = inlen;
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int l;
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int ch;
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while (todo > 0)
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{
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// Only convert if we have a complete sequence.
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l = utf_ptr2len_len(p, todo);
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if (l > todo)
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{
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// Return length of incomplete sequence.
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if (unconvlenp != NULL)
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*unconvlenp = todo;
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break;
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}
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ch = utf_ptr2char(p);
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if (ch >= 0x10000)
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{
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// non-BMP character, encoding with surrogate pairs
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++outlen;
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if (outstr != NULL)
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{
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*outstr++ = (0xD800 - (0x10000 >> 10)) + (ch >> 10);
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*outstr++ = 0xDC00 | (ch & 0x3FF);
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}
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}
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else if (outstr != NULL)
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*outstr++ = ch;
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++outlen;
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p += l;
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todo -= l;
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}
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return outlen;
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}
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/*
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* Convert an UTF-16 string to UTF-8.
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* The input is "instr[inlen]" with "inlen" in number of UTF-16 words.
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* When "outstr" is NULL only return the required number of bytes.
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* Otherwise "outstr" must be a buffer of sufficient size.
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* Return the number of bytes produced.
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*/
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int
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utf16_to_utf8(short_u *instr, int inlen, char_u *outstr)
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{
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int outlen = 0;
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int todo = inlen;
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short_u *p = instr;
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int l;
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int ch, ch2;
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while (todo > 0)
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{
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ch = *p;
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if (ch >= 0xD800 && ch <= 0xDBFF && todo > 1)
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{
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// surrogate pairs handling
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ch2 = p[1];
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if (ch2 >= 0xDC00 && ch2 <= 0xDFFF)
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{
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ch = ((ch - 0xD800) << 10) + (ch2 & 0x3FF) + 0x10000;
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++p;
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--todo;
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}
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}
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if (outstr != NULL)
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{
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l = utf_char2bytes(ch, outstr);
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outstr += l;
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}
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else
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l = utf_char2len(ch);
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++p;
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outlen += l;
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--todo;
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}
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return outlen;
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}
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/*
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* Call MultiByteToWideChar() and allocate memory for the result.
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* Returns the result in "*out[*outlen]" with an extra zero appended.
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* "outlen" is in words.
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*/
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void
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MultiByteToWideChar_alloc(UINT cp, DWORD flags,
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LPCSTR in, int inlen,
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LPWSTR *out, int *outlen)
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{
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*outlen = MultiByteToWideChar(cp, flags, in, inlen, 0, 0);
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// Add one word to avoid a zero-length alloc().
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*out = ALLOC_MULT(WCHAR, *outlen + 1);
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if (*out == NULL)
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return;
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MultiByteToWideChar(cp, flags, in, inlen, *out, *outlen);
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(*out)[*outlen] = 0;
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}
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/*
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* Call WideCharToMultiByte() and allocate memory for the result.
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* Returns the result in "*out[*outlen]" with an extra NUL appended.
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*/
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void
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WideCharToMultiByte_alloc(UINT cp, DWORD flags,
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LPCWSTR in, int inlen,
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LPSTR *out, int *outlen,
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LPCSTR def, LPBOOL useddef)
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{
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*outlen = WideCharToMultiByte(cp, flags, in, inlen, NULL, 0, def, useddef);
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// Add one byte to avoid a zero-length alloc().
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*out = alloc(*outlen + 1);
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if (*out == NULL)
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return;
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WideCharToMultiByte(cp, flags, in, inlen, *out, *outlen, def, useddef);
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(*out)[*outlen] = 0;
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}
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#ifdef FEAT_CLIPBOARD
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/*
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* Clipboard stuff, for cutting and pasting text to other windows.
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*/
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void
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win_clip_init(void)
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{
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clip_init(TRUE);
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/*
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* Vim's own clipboard format recognises whether the text is char, line,
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* or rectangular block. Only useful for copying between two Vims.
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* "Clipboard_T" was used for previous versions, using the first
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* character to specify MCHAR, MLINE or MBLOCK.
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*/
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clip_star.format = RegisterClipboardFormat("VimClipboard2");
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clip_star.format_raw = RegisterClipboardFormat("VimRawBytes");
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}
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// Type used for the clipboard type of Vim's data.
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typedef struct
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{
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int type; // MCHAR, MBLOCK or MLINE
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int txtlen; // length of CF_TEXT in bytes
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int ucslen; // length of CF_UNICODETEXT in words
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int rawlen; // length of clip_star.format_raw, including encoding,
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// excluding terminating NUL
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} VimClipType_t;
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/*
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* Make vim the owner of the current selection. Return OK upon success.
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*/
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int
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clip_mch_own_selection(Clipboard_T *cbd UNUSED)
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{
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/*
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* Never actually own the clipboard. If another application sets the
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* clipboard, we don't want to think that we still own it.
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*/
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return FAIL;
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}
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/*
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* Make vim NOT the owner of the current selection.
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*/
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void
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clip_mch_lose_selection(Clipboard_T *cbd UNUSED)
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{
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// Nothing needs to be done here
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}
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/*
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* Copy "str[*size]" into allocated memory, changing CR-NL to NL.
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* Return the allocated result and the size in "*size".
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* Returns NULL when out of memory.
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*/
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static char_u *
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crnl_to_nl(const char_u *str, int *size)
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{
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int pos = 0;
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int str_len = *size;
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char_u *ret;
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char_u *retp;
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// Avoid allocating zero bytes, it generates an error message.
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ret = alloc(str_len == 0 ? 1 : str_len);
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if (ret != NULL)
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{
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retp = ret;
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for (pos = 0; pos < str_len; ++pos)
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{
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if (str[pos] == '\r' && str[pos + 1] == '\n')
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{
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++pos;
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--(*size);
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}
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*retp++ = str[pos];
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}
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}
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return ret;
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}
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/*
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* Wait for another process to Close the Clipboard.
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* Returns TRUE for success.
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*/
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static int
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vim_open_clipboard(void)
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{
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int delay = 10;
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while (!OpenClipboard(NULL))
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{
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if (delay > 500)
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return FALSE; // waited too long, give up
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Sleep(delay);
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delay *= 2; // wait for 10, 20, 40, 80, etc. msec
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}
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return TRUE;
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}
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/*
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* Get the current selection and put it in the clipboard register.
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*
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* NOTE: Must use GlobalLock/Unlock here to ensure Win32s compatibility.
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* On NT/W95 the clipboard data is a fixed global memory object and
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* so its handle = its pointer.
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* On Win32s, however, co-operation with the Win16 system means that
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* the clipboard data is moveable and its handle is not a pointer at all,
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* so we can't just cast the return value of GetClipboardData to (char_u*).
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* <VN>
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*/
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void
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clip_mch_request_selection(Clipboard_T *cbd)
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{
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VimClipType_t metadata = { -1, -1, -1, -1 };
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HGLOBAL hMem = NULL;
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char_u *str = NULL;
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char_u *to_free = NULL;
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HGLOBAL rawh = NULL;
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int str_size = 0;
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int maxlen;
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size_t n;
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/*
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* Don't pass GetActiveWindow() as an argument to OpenClipboard() because
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* then we can't paste back into the same window for some reason - webb.
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*/
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if (!vim_open_clipboard())
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return;
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// Check for vim's own clipboard format first. This only gets the type of
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// the data, still need to use CF_UNICODETEXT or CF_TEXT for the text.
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if (IsClipboardFormatAvailable(cbd->format))
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{
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VimClipType_t *meta_p;
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HGLOBAL meta_h;
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// We have metadata on the clipboard; try to get it.
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if ((meta_h = GetClipboardData(cbd->format)) != NULL
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&& (meta_p = (VimClipType_t *)GlobalLock(meta_h)) != NULL)
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{
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// The size of "VimClipType_t" changed, "rawlen" was added later.
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// Only copy what is available for backwards compatibility.
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n = sizeof(VimClipType_t);
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if (GlobalSize(meta_h) < n)
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n = GlobalSize(meta_h);
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memcpy(&metadata, meta_p, n);
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GlobalUnlock(meta_h);
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}
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}
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// Check for Vim's raw clipboard format first. This is used without
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// conversion, but only if 'encoding' matches.
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if (IsClipboardFormatAvailable(cbd->format_raw)
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&& metadata.rawlen > (int)STRLEN(p_enc))
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{
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// We have raw data on the clipboard; try to get it.
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if ((rawh = GetClipboardData(cbd->format_raw)) != NULL)
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{
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char_u *rawp;
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rawp = (char_u *)GlobalLock(rawh);
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if (rawp != NULL && STRCMP(p_enc, rawp) == 0)
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{
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n = STRLEN(p_enc) + 1;
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str = rawp + n;
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str_size = (int)(metadata.rawlen - n);
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}
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else
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{
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GlobalUnlock(rawh);
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rawh = NULL;
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}
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}
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}
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if (str == NULL)
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{
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// Try to get the clipboard in Unicode if it's not an empty string.
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if (IsClipboardFormatAvailable(CF_UNICODETEXT) && metadata.ucslen != 0)
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{
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HGLOBAL hMemW;
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if ((hMemW = GetClipboardData(CF_UNICODETEXT)) != NULL)
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{
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WCHAR *hMemWstr = (WCHAR *)GlobalLock(hMemW);
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// Use the length of our metadata if possible, but limit it to
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// the GlobalSize() for safety.
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maxlen = (int)(GlobalSize(hMemW) / sizeof(WCHAR));
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if (metadata.ucslen >= 0)
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{
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if (metadata.ucslen > maxlen)
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str_size = maxlen;
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else
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str_size = metadata.ucslen;
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}
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else
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{
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for (str_size = 0; str_size < maxlen; ++str_size)
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if (hMemWstr[str_size] == NUL)
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break;
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}
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to_free = str = utf16_to_enc((short_u *)hMemWstr, &str_size);
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GlobalUnlock(hMemW);
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}
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}
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// Get the clipboard in the Active codepage.
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else if (IsClipboardFormatAvailable(CF_TEXT))
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{
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if ((hMem = GetClipboardData(CF_TEXT)) != NULL)
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{
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str = (char_u *)GlobalLock(hMem);
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// The length is either what our metadata says or the strlen().
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// But limit it to the GlobalSize() for safety.
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maxlen = (int)GlobalSize(hMem);
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if (metadata.txtlen >= 0)
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{
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if (metadata.txtlen > maxlen)
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str_size = maxlen;
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else
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str_size = metadata.txtlen;
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}
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else
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{
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for (str_size = 0; str_size < maxlen; ++str_size)
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if (str[str_size] == NUL)
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break;
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}
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// The text is in the active codepage. Convert to
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// 'encoding', going through UTF-16.
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acp_to_enc(str, str_size, &to_free, &maxlen);
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if (to_free != NULL)
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{
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str_size = maxlen;
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str = to_free;
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}
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}
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}
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}
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if (str != NULL && metadata.txtlen != 0)
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{
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char_u *temp_clipboard;
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// If the type is not known detect it.
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if (metadata.type == -1)
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metadata.type = MAUTO;
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// Translate <CR><NL> into <NL>.
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temp_clipboard = crnl_to_nl(str, &str_size);
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if (temp_clipboard != NULL)
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{
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clip_yank_selection(metadata.type, temp_clipboard, str_size, cbd);
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vim_free(temp_clipboard);
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}
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}
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// unlock the global object
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if (hMem != NULL)
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GlobalUnlock(hMem);
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if (rawh != NULL)
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GlobalUnlock(rawh);
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CloseClipboard();
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vim_free(to_free);
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}
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/*
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* Send the current selection to the clipboard.
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*/
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void
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clip_mch_set_selection(Clipboard_T *cbd)
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{
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char_u *str = NULL;
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VimClipType_t metadata;
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long_u txtlen;
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HGLOBAL hMemRaw = NULL;
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HGLOBAL hMem = NULL;
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HGLOBAL hMemVim = NULL;
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HGLOBAL hMemW = NULL;
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// If the '*' register isn't already filled in, fill it in now
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cbd->owned = TRUE;
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clip_get_selection(cbd);
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cbd->owned = FALSE;
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// Get the text to be put on the clipboard, with CR-LF.
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metadata.type = clip_convert_selection(&str, &txtlen, cbd);
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if (metadata.type < 0)
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return;
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metadata.txtlen = (int)txtlen;
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metadata.ucslen = 0;
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metadata.rawlen = 0;
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// Always set the raw bytes: 'encoding', NUL and the text. This is used
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// when copy/paste from/to Vim with the same 'encoding', so that illegal
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// bytes can also be copied and no conversion is needed.
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{
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LPSTR lpszMemRaw;
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metadata.rawlen = (int)(txtlen + STRLEN(p_enc) + 1);
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hMemRaw = (LPSTR)GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE,
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metadata.rawlen + 1);
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lpszMemRaw = (LPSTR)GlobalLock(hMemRaw);
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if (lpszMemRaw != NULL)
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{
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STRCPY(lpszMemRaw, p_enc);
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memcpy(lpszMemRaw + STRLEN(p_enc) + 1, str, txtlen + 1);
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GlobalUnlock(hMemRaw);
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}
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else
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metadata.rawlen = 0;
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}
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{
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WCHAR *out;
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int len = metadata.txtlen;
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// Convert the text to UTF-16. This is put on the clipboard as
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// CF_UNICODETEXT.
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out = (WCHAR *)enc_to_utf16(str, &len);
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if (out != NULL)
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{
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WCHAR *lpszMemW;
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// Convert the text for CF_TEXT to Active codepage. Otherwise it's
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// p_enc, which has no relation to the Active codepage.
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metadata.txtlen = WideCharToMultiByte(GetACP(), 0, out, len,
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NULL, 0, 0, 0);
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vim_free(str);
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str = alloc(metadata.txtlen == 0 ? 1 : metadata.txtlen);
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if (str == NULL)
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{
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vim_free(out);
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return; // out of memory
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}
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WideCharToMultiByte(GetACP(), 0, out, len,
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(LPSTR)str, metadata.txtlen, 0, 0);
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// Allocate memory for the UTF-16 text, add one NUL word to
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// terminate the string.
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hMemW = (LPSTR)GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE,
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(len + 1) * sizeof(WCHAR));
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lpszMemW = (WCHAR *)GlobalLock(hMemW);
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if (lpszMemW != NULL)
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{
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memcpy(lpszMemW, out, len * sizeof(WCHAR));
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lpszMemW[len] = NUL;
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GlobalUnlock(hMemW);
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}
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vim_free(out);
|
|
metadata.ucslen = len;
|
|
}
|
|
}
|
|
|
|
// Allocate memory for the text, add one NUL byte to terminate the string.
|
|
hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, metadata.txtlen + 1);
|
|
{
|
|
LPSTR lpszMem = (LPSTR)GlobalLock(hMem);
|
|
|
|
if (lpszMem)
|
|
{
|
|
mch_memmove((char_u *)lpszMem, str, metadata.txtlen);
|
|
GlobalUnlock(hMem);
|
|
}
|
|
}
|
|
|
|
// Set up metadata:
|
|
{
|
|
VimClipType_t *lpszMemVim = NULL;
|
|
|
|
hMemVim = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE,
|
|
sizeof(VimClipType_t));
|
|
lpszMemVim = (VimClipType_t *)GlobalLock(hMemVim);
|
|
memcpy(lpszMemVim, &metadata, sizeof(metadata));
|
|
GlobalUnlock(hMemVim);
|
|
}
|
|
|
|
/*
|
|
* Open the clipboard, clear it and put our text on it.
|
|
* Always set our Vim format. Put Unicode and plain text on it.
|
|
*
|
|
* Don't pass GetActiveWindow() as an argument to OpenClipboard()
|
|
* because then we can't paste back into the same window for some
|
|
* reason - webb.
|
|
*/
|
|
if (vim_open_clipboard())
|
|
{
|
|
if (EmptyClipboard())
|
|
{
|
|
SetClipboardData(cbd->format, hMemVim);
|
|
hMemVim = 0;
|
|
if (hMemW != NULL)
|
|
{
|
|
if (SetClipboardData(CF_UNICODETEXT, hMemW) != NULL)
|
|
hMemW = NULL;
|
|
}
|
|
// Always use CF_TEXT. On Win98 Notepad won't obtain the
|
|
// CF_UNICODETEXT text, only CF_TEXT.
|
|
SetClipboardData(CF_TEXT, hMem);
|
|
hMem = 0;
|
|
}
|
|
CloseClipboard();
|
|
}
|
|
|
|
vim_free(str);
|
|
// Free any allocations we didn't give to the clipboard:
|
|
if (hMemRaw)
|
|
GlobalFree(hMemRaw);
|
|
if (hMem)
|
|
GlobalFree(hMem);
|
|
if (hMemW)
|
|
GlobalFree(hMemW);
|
|
if (hMemVim)
|
|
GlobalFree(hMemVim);
|
|
}
|
|
|
|
#endif // FEAT_CLIPBOARD
|
|
|
|
/*
|
|
* Note: the following two functions are only guaranteed to work when using
|
|
* valid MS-Windows codepages or when iconv() is available.
|
|
*/
|
|
|
|
/*
|
|
* Convert "str" from 'encoding' to UTF-16.
|
|
* Input in "str" with length "*lenp". When "lenp" is NULL, use strlen().
|
|
* Output is returned as an allocated string. "*lenp" is set to the length of
|
|
* the result. A trailing NUL is always added.
|
|
* Returns NULL when out of memory.
|
|
*/
|
|
short_u *
|
|
enc_to_utf16(char_u *str, int *lenp)
|
|
{
|
|
vimconv_T conv;
|
|
WCHAR *ret;
|
|
char_u *allocbuf = NULL;
|
|
int len_loc;
|
|
int length;
|
|
|
|
if (lenp == NULL)
|
|
{
|
|
len_loc = (int)STRLEN(str) + 1;
|
|
lenp = &len_loc;
|
|
}
|
|
|
|
if (enc_codepage > 0)
|
|
{
|
|
// We can do any CP### -> UTF-16 in one pass, and we can do it
|
|
// without iconv() (convert_* may need iconv).
|
|
MultiByteToWideChar_alloc(enc_codepage, 0, (LPCSTR)str, *lenp,
|
|
&ret, &length);
|
|
}
|
|
else
|
|
{
|
|
// Use "latin1" by default, we might be called before we have p_enc
|
|
// set up. Convert to utf-8 first, works better with iconv(). Does
|
|
// nothing if 'encoding' is "utf-8".
|
|
conv.vc_type = CONV_NONE;
|
|
if (convert_setup(&conv, p_enc ? p_enc : (char_u *)"latin1",
|
|
(char_u *)"utf-8") == FAIL)
|
|
return NULL;
|
|
if (conv.vc_type != CONV_NONE)
|
|
{
|
|
str = allocbuf = string_convert(&conv, str, lenp);
|
|
if (str == NULL)
|
|
return NULL;
|
|
}
|
|
convert_setup(&conv, NULL, NULL);
|
|
|
|
length = utf8_to_utf16(str, *lenp, NULL, NULL);
|
|
ret = ALLOC_MULT(WCHAR, length + 1);
|
|
if (ret != NULL)
|
|
{
|
|
utf8_to_utf16(str, *lenp, (short_u *)ret, NULL);
|
|
ret[length] = 0;
|
|
}
|
|
|
|
vim_free(allocbuf);
|
|
}
|
|
|
|
*lenp = length;
|
|
return (short_u *)ret;
|
|
}
|
|
|
|
/*
|
|
* Convert an UTF-16 string to 'encoding'.
|
|
* Input in "str" with length (counted in wide characters) "*lenp". When
|
|
* "lenp" is NULL, use wcslen().
|
|
* Output is returned as an allocated string. If "*lenp" is not NULL it is
|
|
* set to the length of the result.
|
|
* Returns NULL when out of memory.
|
|
*/
|
|
char_u *
|
|
utf16_to_enc(short_u *str, int *lenp)
|
|
{
|
|
vimconv_T conv;
|
|
char_u *utf8_str = NULL, *enc_str = NULL;
|
|
int len_loc;
|
|
|
|
if (lenp == NULL)
|
|
{
|
|
len_loc = (int)wcslen(str) + 1;
|
|
lenp = &len_loc;
|
|
}
|
|
|
|
if (enc_codepage > 0)
|
|
{
|
|
// We can do any UTF-16 -> CP### in one pass.
|
|
int length;
|
|
|
|
WideCharToMultiByte_alloc(enc_codepage, 0, str, *lenp,
|
|
(LPSTR *)&enc_str, &length, 0, 0);
|
|
*lenp = length;
|
|
return enc_str;
|
|
}
|
|
|
|
// Avoid allocating zero bytes, it generates an error message.
|
|
utf8_str = alloc(utf16_to_utf8(str, *lenp == 0 ? 1 : *lenp, NULL));
|
|
if (utf8_str != NULL)
|
|
{
|
|
*lenp = utf16_to_utf8(str, *lenp, utf8_str);
|
|
|
|
// We might be called before we have p_enc set up.
|
|
conv.vc_type = CONV_NONE;
|
|
convert_setup(&conv, (char_u *)"utf-8",
|
|
p_enc? p_enc: (char_u *)"latin1");
|
|
if (conv.vc_type == CONV_NONE)
|
|
{
|
|
// p_enc is utf-8, so we're done.
|
|
enc_str = utf8_str;
|
|
}
|
|
else
|
|
{
|
|
enc_str = string_convert(&conv, utf8_str, lenp);
|
|
vim_free(utf8_str);
|
|
}
|
|
|
|
convert_setup(&conv, NULL, NULL);
|
|
}
|
|
|
|
return enc_str;
|
|
}
|
|
|
|
/*
|
|
* Convert from the active codepage to 'encoding'.
|
|
* Input is "str[str_size]".
|
|
* The result is in allocated memory: "out[outlen]". "outlen" includes the
|
|
* terminating NUL.
|
|
*/
|
|
void
|
|
acp_to_enc(
|
|
char_u *str,
|
|
int str_size,
|
|
char_u **out,
|
|
int *outlen)
|
|
|
|
{
|
|
LPWSTR widestr;
|
|
|
|
MultiByteToWideChar_alloc(GetACP(), 0, (LPCSTR)str, str_size,
|
|
&widestr, outlen);
|
|
if (widestr == NULL)
|
|
return;
|
|
++*outlen; // Include the 0 after the string
|
|
*out = utf16_to_enc((short_u *)widestr, outlen);
|
|
vim_free(widestr);
|
|
}
|
|
|
|
/*
|
|
* Convert from 'encoding' to the active codepage.
|
|
* Input is "str[str_size]".
|
|
* The result is in allocated memory: "out[outlen]". With terminating NUL.
|
|
*/
|
|
void
|
|
enc_to_acp(
|
|
char_u *str,
|
|
int str_size,
|
|
char_u **out,
|
|
int *outlen)
|
|
|
|
{
|
|
LPWSTR widestr;
|
|
int len = str_size;
|
|
|
|
widestr = (WCHAR *)enc_to_utf16(str, &len);
|
|
if (widestr == NULL)
|
|
return;
|
|
WideCharToMultiByte_alloc(GetACP(), 0, widestr, len,
|
|
(LPSTR *)out, outlen, 0, 0);
|
|
vim_free(widestr);
|
|
}
|