mirror of
https://git.lyx.org/repos/lyx.git
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e464398e44
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_3_X@9357 a592a061-630c-0410-9148-cb99ea01b6c8
442 lines
8.6 KiB
C
442 lines
8.6 KiB
C
/**
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* \file ispell.C
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* Copyright 2002 the LyX Team
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* Read the file COPYING
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*
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* \author unknown
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* \author John Levon <levon@movementarian.org>
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*/
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#include <config.h>
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#include "LString.h"
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#include "lyxrc.h"
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#include "language.h"
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#include "debug.h"
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#include "encoding.h"
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#include "ispell.h"
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#include "WordLangTuple.h"
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#include "gettext.h"
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#include "support/forkedcall.h"
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#include "support/lstrings.h"
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// HP-UX 11.x doesn't have this header
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <sys/time.h>
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#ifndef CXX_GLOBAL_CSTD
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using std::strcpy;
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using std::strlen;
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using std::strpbrk;
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using std::strstr;
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#endif
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using std::endl;
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using std::max;
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namespace {
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class LaunchIspell : public ForkedProcess {
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public:
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///
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LaunchIspell(BufferParams const & p, string const & l,
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int * in, int * out, int * err)
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: params(p), lang(l), pipein(in), pipeout(out), pipeerr(err) {}
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///
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virtual ForkedProcess * clone() const {
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return new LaunchIspell(*this);
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}
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///
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int start();
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private:
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///
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virtual int generateChild();
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///
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BufferParams const & params;
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string const & lang;
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int * const pipein;
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int * const pipeout;
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int * const pipeerr;
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};
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int LaunchIspell::start()
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{
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command_ = "ispell";
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return runNonBlocking();
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}
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int LaunchIspell::generateChild()
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{
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pid_t isp_pid = fork();
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if (isp_pid != 0) {
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// failed (-1) or parent process (>0)
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return isp_pid;
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}
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// child process
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dup2(pipein[0], STDIN_FILENO);
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dup2(pipeout[1], STDOUT_FILENO);
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dup2(pipeerr[1], STDERR_FILENO);
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close(pipein[0]);
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close(pipein[1]);
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close(pipeout[0]);
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close(pipeout[1]);
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close(pipeerr[0]);
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close(pipeerr[1]);
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char * argv[14];
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int argc = 0;
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char * tmp = new char[lyxrc.isp_command.length() + 1];
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lyxrc.isp_command.copy(tmp, lyxrc.isp_command.length());
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tmp[lyxrc.isp_command.length()] = '\0';
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argv[argc++] = tmp;
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tmp = new char[3];
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string("-a").copy(tmp, 2); tmp[2] = '\0'; // pipe mode
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argv[argc++] = tmp;
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if (lang != "default") {
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tmp = new char[3];
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string("-d").copy(tmp, 2); tmp[2] = '\0'; // Dictionary file
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argv[argc++] = tmp;
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tmp = new char[lang.length() + 1];
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lang.copy(tmp, lang.length()); tmp[lang.length()] = '\0';
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argv[argc++] = tmp;
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}
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if (lyxrc.isp_accept_compound) {
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// Consider run-together words as legal compounds
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tmp = new char[3];
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string("-C").copy(tmp, 2); tmp[2] = '\0';
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argv[argc++] = tmp;
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} else {
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// Report run-together words with
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// missing blanks as errors
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tmp = new char[3];
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string("-B").copy(tmp, 2); tmp[2] = '\0';
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argv[argc++] = tmp;
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}
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if (lyxrc.isp_use_esc_chars) {
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// Specify additional characters that
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// can be part of a word
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tmp = new char[3];
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string("-w").copy(tmp, 2); tmp[2] = '\0';
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argv[argc++] = tmp;
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// Put the escape chars in ""s
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string tms = '"' + lyxrc.isp_esc_chars + '"';
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tmp = new char[tms.length() + 1];
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tms.copy(tmp, tms.length()); tmp[tms.length()] = '\0';
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argv[argc++] = tmp;
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}
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if (lyxrc.isp_use_pers_dict) {
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// Specify an alternate personal dictionary
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tmp = new char[3];
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string("-p").copy(tmp, 2);
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tmp[2]= '\0';
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argv[argc++] = tmp;
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tmp = new char[lyxrc.isp_pers_dict.length() + 1];
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lyxrc.isp_pers_dict.copy(tmp, lyxrc.isp_pers_dict.length());
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tmp[lyxrc.isp_pers_dict.length()] = '\0';
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argv[argc++] = tmp;
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}
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if (lyxrc.isp_use_input_encoding &&
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params.inputenc != "default") {
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string enc = (params.inputenc == "auto")
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? params.language->encoding()->LatexName()
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: params.inputenc;
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string::size_type n = enc.length();
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tmp = new char[3];
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string("-T").copy(tmp, 2);
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tmp[2] = '\0';
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argv[argc++] = tmp; // Input encoding
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tmp = new char[n + 1];
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enc.copy(tmp, n);
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tmp[n] = '\0';
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argv[argc++] = tmp;
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}
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argv[argc++] = 0;
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execvp(argv[0], const_cast<char * const *>(argv));
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// free the memory used by string::copy in the
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// setup of argv
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for (int i = 0; i < argc - 1; ++i)
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delete[] argv[i];
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lyxerr << "LyX: Failed to start ispell!" << endl;
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_exit(0);
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}
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} // namespace anon
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ISpell::ISpell(BufferParams const & params, string const & lang)
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: in(0), out(0), inerr(0), str(0)
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{
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lyxerr[Debug::GUI] << "Created ispell" << endl;
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// static due to the setvbuf. Ugly.
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static char o_buf[BUFSIZ];
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// We need to throw an exception not do this
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pipein[0] = pipein[1] = pipeout[0] = pipeout[1]
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= pipeerr[0] = pipeerr[1] = -1;
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// This is what happens when goto gets banned.
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if (pipe(pipein) == -1) {
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error_ = _("Can't create pipe for spellchecker.");
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return;
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}
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if (pipe(pipeout) == -1) {
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close(pipein[0]);
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close(pipein[1]);
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error_ = _("Can't create pipe for spellchecker.");
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return;
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}
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if (pipe(pipeerr) == -1) {
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close(pipein[0]);
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close(pipein[1]);
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close(pipeout[0]);
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close(pipeout[1]);
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error_ = _("Can't create pipe for spellchecker.");
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return;
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}
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if ((out = fdopen(pipein[1], "w")) == 0) {
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error_ = _("Can't open pipe for spellchecker.");
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return;
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}
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if ((in = fdopen(pipeout[0], "r")) == 0) {
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error_ = _("Can't open pipe for spellchecker.");
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return;
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}
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if ((inerr = fdopen(pipeerr[0], "r")) == 0) {
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error_ = _("Can't open pipe for spellchecker.");
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return;
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}
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setvbuf(out, o_buf, _IOLBF, BUFSIZ);
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LaunchIspell * li = new LaunchIspell(params, lang, pipein, pipeout, pipeerr);
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child_.reset(li);
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if (li->start() == -1) {
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error_ = _("Could not create an ispell process.\nYou may not have "
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"the right languages installed.");
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child_.reset(0);
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return;
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}
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/* Parent process: Read ispells identification message */
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bool err_read;
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bool error = select(err_read);
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if (!error) {
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if (!err_read) {
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// Set terse mode (silently accept correct words)
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fputs("!\n", out);
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return;
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}
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/* must have read something from stderr */
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error_ = buf;
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} else {
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// select returned error
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error_ = _("The spell process returned an error.\nPerhaps "
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"it has been configured wrongly ?");
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}
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close(pipein[0]);
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close(pipein[1]);
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close(pipeout[0]);
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close(pipeout[1]);
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close(pipeerr[0]);
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close(pipeerr[1]);
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child_->kill();
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child_.reset(0);
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}
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ISpell::~ISpell()
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{
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lyxerr[Debug::GUI] << "Killing ispell" << endl;
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if (in)
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fclose(in);
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if (inerr)
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fclose(inerr);
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if (out) {
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fputs("#\n", out); // Save personal dictionary
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fflush(out);
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fclose(out);
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}
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close(pipein[0]);
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close(pipein[1]);
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close(pipeout[0]);
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close(pipeout[1]);
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close(pipeerr[0]);
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close(pipeerr[1]);
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delete [] str;
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}
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bool ISpell::select(bool & err_read)
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{
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fd_set infds;
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struct timeval tv;
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int retval = 0;
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FD_ZERO(&infds);
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FD_SET(pipeout[0], &infds);
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FD_SET(pipeerr[0], &infds);
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tv.tv_sec = 2;
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tv.tv_usec = 0;
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retval = ::select(SELECT_TYPE_ARG1 (max(pipeout[0], pipeerr[0]) + 1),
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SELECT_TYPE_ARG234 (&infds),
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0,
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0,
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SELECT_TYPE_ARG5 (&tv));
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// error
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if (retval <= 0)
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return true;
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if (FD_ISSET(pipeerr[0], &infds)) {
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fgets(buf, BUFSIZ, inerr);
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err_read = true;
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return false;
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}
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fgets(buf, BUFSIZ, in);
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err_read = false;
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return false;
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}
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string const ISpell::nextMiss()
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{
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// Well, somebody is a sick fuck.
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if (str == 0 || *(e+1) == '\0')
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return "";
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char * b = e + 2;
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e = strpbrk(b, ",\n");
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*e = '\0';
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if (b)
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return b;
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return "";
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}
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bool ISpell::alive()
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{
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return child_.get() && child_->running();
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}
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enum ISpell::Result ISpell::check(WordLangTuple const & word)
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{
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// FIXME Please rewrite to use string.
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Result res;
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::fputs(word.word().c_str(), out);
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::fputc('\n', out);
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bool err_read;
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bool error = select(err_read);
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if (error) {
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error_ = _("Could not communicate with the spell-checker program.");
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return UNKNOWN;
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}
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if (err_read) {
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error_ = buf;
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return UNKNOWN;
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}
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// I think we have to check if ispell is still alive here because
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// the signal-handler could have disabled blocking on the fd
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if (!alive())
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return UNKNOWN;
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switch (*buf) {
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case '*':
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res = OK;
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break;
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case '+':
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res = ROOT;
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break;
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case '-':
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res = COMPOUNDWORD;
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break;
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case '\n':
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res = IGNORE;
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break;
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case '#': // Not found, no near misses and guesses
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res = UNKNOWN;
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break;
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case '?': // Not found, and no near misses, but guesses (guesses are ignored)
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case '&': // Not found, but we have near misses
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{
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res = MISSED;
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char * p = strpbrk(buf, ":");
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str = new char[strlen(p) + 1];
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e = str;
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strcpy(str, p);
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break;
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}
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default: // This shouldn't happen, but you know Murphy
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res = UNKNOWN;
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}
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*buf = 0;
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if (res != IGNORE) {
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/* wait for ispell to finish */
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while (*buf!= '\n')
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fgets(buf, 255, in);
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}
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return res;
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}
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void ISpell::insert(WordLangTuple const & word)
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{
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::fputc('*', out); // Insert word in personal dictionary
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::fputs(word.word().c_str(), out);
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::fputc('\n', out);
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}
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void ISpell::accept(WordLangTuple const & word)
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{
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::fputc('@', out); // Accept in this session
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::fputs(word.word().c_str(), out);
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::fputc('\n', out);
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}
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string const ISpell::error()
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{
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return error_;
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}
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