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// -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
/*
* Copyright 2013 Inalogic® Inc.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, as
* published by the Free Software Foundation; either version 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Brandon Schaefer
*
*/
#include "Nux.h"
#include "TextEntry.h"
#include "XICClient.h"
#include <string>
#include "NuxCore/Logger.h"
DECLARE_LOGGER(logger, "xim.callbacks");
using namespace std;
namespace nux
{
int const FEEDBACK_MASK = (XIMUnderline | XIMReverse);
int XICClient::PreeditStartCallback(XIC xic,
XPointer clientdata,
XPointer call_data)
{
TextEntry* text_entry = (TextEntry*)clientdata;
if (text_entry)
{
text_entry->PreeditStarted();
}
return 0;
}
int XICClient::PreeditDoneCallback(XIC xic,
XPointer clientdata,
XPointer call_data)
{
TextEntry* text_entry = (TextEntry*)clientdata;
if (text_entry)
{
text_entry->ClearPreedit();
}
return 0;
}
void add_feedback_attr(PangoAttrList* attrs,
char const* str,
XIMFeedback feedback,
int start,
int end)
{
PangoAttribute* attr;
int start_index = g_utf8_offset_to_pointer(str, start) - str;
int end_index = g_utf8_offset_to_pointer(str, end) - str;
if (feedback & XIMUnderline)
{
attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert (attrs, attr);
}
if (feedback & XIMReverse)
{
attr = pango_attr_foreground_new(0xFFFF, 0xFFFF, 0xFFFF);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert (attrs, attr);
attr = pango_attr_background_new(0x0, 0x0, 0x0);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert (attrs, attr);
}
if (feedback & ~FEEDBACK_MASK)
{
LOG_WARN(logger) << "Unrenderer feedback: " << (feedback & ~FEEDBACK_MASK);
}
}
void feedback_to_pango_list(PangoAttrList** attrs,
char const* str,
int nfeedbacks,
XIMFeedback* feedbacks)
{
XIMFeedback last_feedback = 0;
int start = -1;
int i = 0;
if (attrs)
{
*attrs = pango_attr_list_new();
for (i = 0; i < nfeedbacks; ++i)
{
XIMFeedback new_feedback = (feedbacks[i] & FEEDBACK_MASK);
if (new_feedback != last_feedback)
{
last_feedback = new_feedback;
start = i;
}
else
{
PangoAttribute* attr;
int start_index = g_utf8_offset_to_pointer(str, start) - str;
int end_index = g_utf8_offset_to_pointer(str, i) - str;
attr = pango_attr_foreground_new(0x0, 0x0, 0x0);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert (*attrs, attr);
attr = pango_attr_background_new(0xFFFF, 0xFFFF, 0xFFFF);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert (*attrs, attr);
}
}
if (start >= 0)
add_feedback_attr(*attrs, str, last_feedback, start, i);
}
}
int XICClient::PreeditDrawCallback(XIC xic,
XPointer clientdata,
XIMPreeditDrawCallbackStruct* call_data)
{
TextEntry* text_entry = (TextEntry*)clientdata;
if (call_data->text && text_entry)
{
string preedit;
// TODO Actually handle this correctly...
if (call_data->text->encoding_is_wchar)
{
preedit = string("");
}
else
{
preedit = string(call_data->text->string.multi_byte);
}
PangoAttrList* preedit_attr;
feedback_to_pango_list(&preedit_attr, preedit.c_str(),
call_data->text->length,
call_data->text->feedback);
text_entry->UpdatePreeditAttribs(preedit_attr);
text_entry->UpdatePreedit(preedit, call_data->caret);
}
return 0;
}
}
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