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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <o3tl/safeint.hxx>
+#include <osl/thread.h>
+#include <sal/log.hxx>
+
+#include <X11/Xlib.h>
+
+#include <vcl/commandevent.hxx>
+#include <unx/i18n_cb.hxx>
+#include <unx/i18n_ic.hxx>
+#include <unx/i18n_im.hxx>
+#include <salframe.hxx>
+
+// i. preedit start callback
+
+int
+PreeditStartCallback ( XIC, XPointer client_data, XPointer )
+{
+ preedit_data_t* pPreeditData = reinterpret_cast<preedit_data_t*>(client_data);
+ if ( pPreeditData->eState == PreeditStatus::ActivationRequired )
+ {
+ pPreeditData->eState = PreeditStatus::Active;
+ pPreeditData->aText.nLength = 0;
+ }
+
+ return -1;
+}
+
+// ii. preedit done callback
+
+void
+PreeditDoneCallback ( XIC, XPointer client_data, XPointer )
+{
+ preedit_data_t* pPreeditData = reinterpret_cast<preedit_data_t*>(client_data);
+ if (pPreeditData->eState == PreeditStatus::Active )
+ {
+ if( pPreeditData->pFrame )
+ pPreeditData->pFrame->CallCallback( SalEvent::EndExtTextInput, nullptr );
+ }
+ pPreeditData->eState = PreeditStatus::StartPending;
+}
+
+// iii. preedit draw callback
+
+// Handle deletion of text in a preedit_draw_callback
+// from and howmuch are guaranteed to be nonnegative
+
+static void
+Preedit_DeleteText(preedit_text_t *ptext, int from, int howmuch)
+{
+ // If we've been asked to delete no text then just set
+ // nLength correctly and return
+ if (ptext->nLength == 0)
+ {
+ ptext->nLength = from;
+ return;
+ }
+
+ int to = from + howmuch;
+
+ if (to == static_cast<int>(ptext->nLength))
+ {
+ // delete from the end of the text
+ ptext->nLength = from;
+ }
+ else if (to < static_cast<int>(ptext->nLength))
+ {
+ // cut out of the middle of the text
+ memmove( static_cast<void*>(ptext->pUnicodeBuffer + from),
+ static_cast<void*>(ptext->pUnicodeBuffer + to),
+ (ptext->nLength - to) * sizeof(sal_Unicode));
+ memmove( static_cast<void*>(ptext->pCharStyle + from),
+ static_cast<void*>(ptext->pCharStyle + to),
+ (ptext->nLength - to) * sizeof(XIMFeedback));
+ ptext->nLength -= howmuch;
+ }
+ else
+ {
+ // XXX this indicates an error, are we out of sync ?
+ SAL_INFO("vcl.app", "Preedit_DeleteText( from=" << from
+ << " to=" << to
+ << " length=" << ptext->nLength
+ << " ).");
+ fprintf (stderr, "\t XXX internal error, out of sync XXX\n");
+
+ ptext->nLength = from;
+ }
+
+ // NULL-terminate the string
+ ptext->pUnicodeBuffer[ptext->nLength] = u'\0';
+}
+
+// reallocate the textbuffer with sufficiently large size 2^x
+// nnewlimit is presupposed to be larger than ptext->size
+static void
+enlarge_buffer ( preedit_text_t *ptext, int nnewlimit )
+{
+ size_t nnewsize = ptext->nSize;
+
+ while ( nnewsize <= o3tl::make_unsigned(nnewlimit) )
+ nnewsize *= 2;
+
+ ptext->nSize = nnewsize;
+ ptext->pUnicodeBuffer = static_cast<sal_Unicode*>(realloc(static_cast<void*>(ptext->pUnicodeBuffer),
+ nnewsize * sizeof(sal_Unicode)));
+ ptext->pCharStyle = static_cast<XIMFeedback*>(realloc(static_cast<void*>(ptext->pCharStyle),
+ nnewsize * sizeof(XIMFeedback)));
+}
+
+// Handle insertion of text in a preedit_draw_callback
+// string field of XIMText struct is guaranteed to be != NULL
+
+static void
+Preedit_InsertText(preedit_text_t *pText, XIMText *pInsertText, int where)
+{
+ sal_Unicode *pInsertTextString;
+ int nInsertTextLength = 0;
+ XIMFeedback *pInsertTextCharStyle = pInsertText->feedback;
+
+ nInsertTextLength = pInsertText->length;
+
+ // can't handle wchar_t strings, so convert to multibyte chars first
+ char *pMBString;
+ size_t nMBLength;
+ if (pInsertText->encoding_is_wchar)
+ {
+ wchar_t *pWCString = pInsertText->string.wide_char;
+ size_t nBytes = wcstombs ( nullptr, pWCString, 0 /* don't care */);
+ pMBString = static_cast<char*>(alloca( nBytes + 1 ));
+ nMBLength = wcstombs ( pMBString, pWCString, nBytes + 1);
+ }
+ else
+ {
+ pMBString = pInsertText->string.multi_byte;
+ nMBLength = strlen(pMBString); // xxx
+ }
+
+ // convert multibyte chars to unicode
+ rtl_TextEncoding nEncoding = osl_getThreadTextEncoding();
+
+ if (nEncoding != RTL_TEXTENCODING_UNICODE)
+ {
+ rtl_TextToUnicodeConverter aConverter =
+ rtl_createTextToUnicodeConverter( nEncoding );
+ rtl_TextToUnicodeContext aContext =
+ rtl_createTextToUnicodeContext(aConverter);
+
+ sal_Size nBufferSize = nInsertTextLength * 2;
+
+ pInsertTextString = static_cast<sal_Unicode*>(alloca(nBufferSize));
+
+ sal_uInt32 nConversionInfo;
+ sal_Size nConvertedChars;
+
+ rtl_convertTextToUnicode( aConverter, aContext,
+ pMBString, nMBLength,
+ pInsertTextString, nBufferSize,
+ RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_IGNORE
+ | RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE,
+ &nConversionInfo, &nConvertedChars );
+
+ rtl_destroyTextToUnicodeContext(aConverter, aContext);
+ rtl_destroyTextToUnicodeConverter(aConverter);
+
+ }
+ else
+ {
+ pInsertTextString = reinterpret_cast<sal_Unicode*>(pMBString);
+ }
+
+ // enlarge target text-buffer if necessary
+ if (pText->nSize <= (pText->nLength + nInsertTextLength))
+ enlarge_buffer(pText, pText->nLength + nInsertTextLength);
+
+ // insert text: displace old mem and put new bytes in
+ int from = where;
+ int to = where + nInsertTextLength;
+ int howmany = pText->nLength - where;
+
+ memmove(static_cast<void*>(pText->pUnicodeBuffer + to),
+ static_cast<void*>(pText->pUnicodeBuffer + from),
+ howmany * sizeof(sal_Unicode));
+ memmove(static_cast<void*>(pText->pCharStyle + to),
+ static_cast<void*>(pText->pCharStyle + from),
+ howmany * sizeof(XIMFeedback));
+
+ to = from;
+ howmany = nInsertTextLength;
+
+ memcpy(static_cast<void*>(pText->pUnicodeBuffer + to), static_cast<void*>(pInsertTextString),
+ howmany * sizeof(sal_Unicode));
+ memcpy(static_cast<void*>(pText->pCharStyle + to), static_cast<void*>(pInsertTextCharStyle),
+ howmany * sizeof(XIMFeedback));
+
+ pText->nLength += howmany;
+
+ // NULL-terminate the string
+ pText->pUnicodeBuffer[pText->nLength] = u'\0';
+}
+
+// Handle the change of attributes in a preedit_draw_callback
+
+static void
+Preedit_UpdateAttributes ( preedit_text_t* ptext, XIMFeedback const * feedback,
+ int from, int amount )
+{
+ if ( (from + amount) > static_cast<int>(ptext->nLength) )
+ {
+ // XXX this indicates an error, are we out of sync ?
+ SAL_INFO("vcl.app", "Preedit_UpdateAttributes( "
+ << from << " + " << amount << " > " << ptext->nLength
+ << " ).");
+ fprintf (stderr, "\t XXX internal error, out of sync XXX\n");
+
+ return;
+ }
+
+ memcpy ( ptext->pCharStyle + from,
+ feedback, amount * sizeof(XIMFeedback) );
+}
+
+// Convert the XIM feedback values into appropriate VCL
+// EXTTEXTINPUT_ATTR values
+// returns an allocate list of attributes, which must be freed by caller
+static ExtTextInputAttr*
+Preedit_FeedbackToSAL ( const XIMFeedback* pfeedback, int nlength, std::vector<ExtTextInputAttr>& rSalAttr )
+{
+ ExtTextInputAttr *psalattr;
+ ExtTextInputAttr nval;
+ ExtTextInputAttr noldval = ExtTextInputAttr::NONE;
+ XIMFeedback nfeedback;
+
+ // only work with reasonable length
+ if (nlength > 0 && nlength > sal::static_int_cast<int>(rSalAttr.size()) )
+ {
+ rSalAttr.reserve( nlength );
+ psalattr = rSalAttr.data();
+ }
+ else
+ return nullptr;
+
+ for (int npos = 0; npos < nlength; npos++)
+ {
+ nval = ExtTextInputAttr::NONE;
+ nfeedback = pfeedback[npos];
+
+ // means to use the feedback of the previous char
+ if (nfeedback == 0)
+ {
+ nval = noldval;
+ }
+ // convert feedback to attributes
+ else
+ {
+ if (nfeedback & XIMReverse)
+ nval |= ExtTextInputAttr::Highlight;
+ if (nfeedback & XIMUnderline)
+ nval |= ExtTextInputAttr::Underline;
+ if (nfeedback & XIMHighlight)
+ nval |= ExtTextInputAttr::Highlight;
+ if (nfeedback & XIMPrimary)
+ nval |= ExtTextInputAttr::DottedUnderline;
+ if (nfeedback & XIMSecondary)
+ nval |= ExtTextInputAttr::DashDotUnderline;
+ if (nfeedback & XIMTertiary) // same as 2ery
+ nval |= ExtTextInputAttr::DashDotUnderline;
+
+ }
+ // copy in list
+ psalattr[npos] = nval;
+ noldval = nval;
+ }
+ // return list of sal attributes
+ return psalattr;
+}
+
+void
+PreeditDrawCallback(XIC ic, XPointer client_data,
+ XIMPreeditDrawCallbackStruct *call_data)
+{
+ preedit_data_t* pPreeditData = reinterpret_cast<preedit_data_t*>(client_data);
+
+ // if there's nothing to change then change nothing
+ if ( ( (call_data->text == nullptr) && (call_data->chg_length == 0) )
+ || pPreeditData->pFrame == nullptr )
+ return;
+
+ // Solaris 7 deletes the preedit buffer after commit
+ // since the next call to preeditstart will have the same effect just skip this.
+ // if (pPreeditData->eState == ePreeditStatusStartPending && call_data->text == NULL)
+ // return;
+
+ if ( pPreeditData->eState == PreeditStatus::StartPending )
+ pPreeditData->eState = PreeditStatus::ActivationRequired;
+ PreeditStartCallback( ic, client_data, nullptr );
+
+ // Edit the internal textbuffer as indicated by the call_data,
+ // chg_first and chg_length are guaranteed to be nonnegative
+
+ // handle text deletion
+ if (call_data->text == nullptr)
+ {
+ Preedit_DeleteText(&(pPreeditData->aText),
+ call_data->chg_first, call_data->chg_length );
+ }
+ else
+ {
+ // handle text insertion
+ if ( (call_data->chg_length == 0)
+ && (call_data->text->string.wide_char != nullptr))
+ {
+ Preedit_InsertText(&(pPreeditData->aText), call_data->text,
+ call_data->chg_first);
+ }
+ else if ( (call_data->chg_length != 0)
+ && (call_data->text->string.wide_char != nullptr))
+ {
+ // handle text replacement by deletion and insertion of text,
+ // not smart, just good enough
+
+ Preedit_DeleteText(&(pPreeditData->aText),
+ call_data->chg_first, call_data->chg_length);
+ Preedit_InsertText(&(pPreeditData->aText), call_data->text,
+ call_data->chg_first);
+ }
+ else if ( (call_data->chg_length != 0)
+ && (call_data->text->string.wide_char == nullptr))
+ {
+ // not really a text update, only attributes are concerned
+ Preedit_UpdateAttributes(&(pPreeditData->aText),
+ call_data->text->feedback,
+ call_data->chg_first, call_data->chg_length);
+ }
+ }
+
+ // build the SalExtTextInputEvent and send it up
+
+ pPreeditData->aInputEv.mpTextAttr = Preedit_FeedbackToSAL(
+ pPreeditData->aText.pCharStyle, pPreeditData->aText.nLength, pPreeditData->aInputFlags);
+ pPreeditData->aInputEv.mnCursorPos = call_data->caret;
+ pPreeditData->aInputEv.maText = OUString(pPreeditData->aText.pUnicodeBuffer,
+ pPreeditData->aText.nLength);
+ pPreeditData->aInputEv.mnCursorFlags = 0; // default: make cursor visible
+
+ if ( pPreeditData->eState == PreeditStatus::Active && pPreeditData->pFrame )
+ pPreeditData->pFrame->CallCallback(SalEvent::ExtTextInput, static_cast<void*>(&pPreeditData->aInputEv));
+ if (pPreeditData->aText.nLength == 0 && pPreeditData->pFrame )
+ pPreeditData->pFrame->CallCallback( SalEvent::EndExtTextInput, nullptr );
+
+ if (pPreeditData->aText.nLength == 0)
+ pPreeditData->eState = PreeditStatus::StartPending;
+
+ GetPreeditSpotLocation(ic, reinterpret_cast<XPointer>(pPreeditData));
+}
+
+void
+GetPreeditSpotLocation(XIC ic, XPointer client_data)
+{
+
+ // Send SalEventExtTextInputPos event to get spotlocation
+
+ SalExtTextInputPosEvent aPosEvent;
+ preedit_data_t* pPreeditData = reinterpret_cast<preedit_data_t*>(client_data);
+
+ if( pPreeditData->pFrame )
+ pPreeditData->pFrame->CallCallback(SalEvent::ExtTextInputPos, static_cast<void*>(&aPosEvent));
+
+ XPoint point;
+ point.x = aPosEvent.mnX + aPosEvent.mnWidth;
+ point.y = aPosEvent.mnY + aPosEvent.mnHeight;
+
+ XVaNestedList preedit_attr;
+ preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &point, nullptr);
+ XSetICValues(ic, XNPreeditAttributes, preedit_attr, nullptr);
+ XFree(preedit_attr);
+}
+
+// iv. preedit caret callback
+
+#if OSL_DEBUG_LEVEL > 1
+void
+PreeditCaretCallback ( XIC ic, XPointer client_data,
+ XIMPreeditCaretCallbackStruct *call_data )
+{
+ // XXX PreeditCaretCallback is pure debug code for now
+ const char *direction = "?";
+ const char *style = "?";
+
+ switch ( call_data->style )
+ {
+ case XIMIsInvisible: style = "Invisible"; break;
+ case XIMIsPrimary: style = "Primary"; break;
+ case XIMIsSecondary: style = "Secondary"; break;
+ }
+ switch ( call_data->direction )
+ {
+ case XIMForwardChar: direction = "Forward char"; break;
+ case XIMBackwardChar: direction = "Backward char"; break;
+ case XIMForwardWord: direction = "Forward word"; break;
+ case XIMBackwardWord: direction = "Backward word"; break;
+ case XIMCaretUp: direction = "Caret up"; break;
+ case XIMCaretDown: direction = "Caret down"; break;
+ case XIMNextLine: direction = "Next line"; break;
+ case XIMPreviousLine: direction = "Previous line"; break;
+ case XIMLineStart: direction = "Line start"; break;
+ case XIMLineEnd: direction = "Line end"; break;
+ case XIMAbsolutePosition: direction = "Absolute"; break;
+ case XIMDontChange: direction = "Don't change"; break;
+ }
+
+ SAL_INFO("vcl.app", "PreeditCaretCallback( ic=" << ic
+ << ", client=" << client_data
+ << ",");
+ SAL_INFO("vcl.app", "\t position=" << call_data->position
+ << ", direction=\"" << direction
+ << "\", style=\"" << style
+ << "\" ).");
+}
+#else
+void
+PreeditCaretCallback ( XIC, XPointer, XIMPreeditCaretCallbackStruct* )
+{
+}
+#endif
+
+// v. commit string callback: convert an extended text input (iiimp ... )
+// into an ordinary key-event
+
+Bool
+IsControlCode(sal_Unicode nChar)
+{
+ if ( nChar <= 0x1F /* C0 controls */ )
+ return True;
+ else
+ return False;
+}
+
+// vi. status callbacks: for now these are empty, they are just needed for turbo linux
+
+void
+StatusStartCallback (XIC, XPointer, XPointer)
+{
+}
+
+void
+StatusDoneCallback (XIC, XPointer, XPointer)
+{
+}
+
+void
+StatusDrawCallback (XIC, XPointer, XIMStatusDrawCallbackStruct *)
+{
+}
+
+// vii. destroy callbacks: internally disable all IC/IM calls
+
+void
+IC_IMDestroyCallback (XIM, XPointer client_data, XPointer)
+{
+ SalI18N_InputContext *pContext = reinterpret_cast<SalI18N_InputContext*>(client_data);
+ if (pContext != nullptr)
+ pContext->HandleDestroyIM();
+}
+
+void
+IM_IMDestroyCallback (XIM, XPointer client_data, XPointer)
+{
+ SalI18N_InputMethod *pMethod = reinterpret_cast<SalI18N_InputMethod*>(client_data);
+ if (pMethod != nullptr)
+ pMethod->HandleDestroyIM();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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