| // Copyright 2010-2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "unix/ibus/preedit_handler.h" |
| |
| #include <string> |
| |
| #include "base/logging.h" |
| #include "session/commands.pb.h" |
| |
| namespace mozc { |
| namespace ibus { |
| |
| namespace { |
| // Returns an IBusText composed from |preedit| to render preedit text. |
| // Caller must release the returned IBusText object. |
| IBusText *ComposePreeditText(const commands::Preedit &preedit) { |
| string data; |
| for (int i = 0; i < preedit.segment_size(); ++i) { |
| data.append(preedit.segment(i).value()); |
| } |
| IBusText *text = ibus_text_new_from_string(data.c_str()); |
| |
| int start = 0; |
| int end = 0; |
| for (int i = 0; i < preedit.segment_size(); ++i) { |
| const commands::Preedit::Segment &segment = preedit.segment(i); |
| IBusAttrUnderline attr = IBUS_ATTR_UNDERLINE_ERROR; |
| switch (segment.annotation()) { |
| case commands::Preedit::Segment::NONE: |
| attr = IBUS_ATTR_UNDERLINE_NONE; |
| break; |
| case commands::Preedit::Segment::UNDERLINE: |
| attr = IBUS_ATTR_UNDERLINE_SINGLE; |
| break; |
| case commands::Preedit::Segment::HIGHLIGHT: |
| attr = IBUS_ATTR_UNDERLINE_DOUBLE; |
| break; |
| default: |
| LOG(ERROR) << "unknown annotation:" << segment.annotation(); |
| break; |
| } |
| end += segment.value_length(); |
| ibus_text_append_attribute(text, |
| IBUS_ATTR_TYPE_UNDERLINE, |
| attr, |
| start, |
| end); |
| |
| // Many applications show a single underline regardless of using |
| // IBUS_ATTR_UNDERLINE_SINGLE or IBUS_ATTR_UNDERLINE_DOUBLE for some |
| // reasons. Here we add a background color for the highlighted candidate |
| // to make it easiliy distinguishable. |
| if (segment.annotation() == commands::Preedit::Segment::HIGHLIGHT) { |
| const guint kBackgroundColor = 0xD1EAFF; |
| ibus_text_append_attribute(text, |
| IBUS_ATTR_TYPE_BACKGROUND, |
| kBackgroundColor, |
| start, |
| end); |
| // IBUS_ATTR_TYPE_FOREGROUND is necessary to highlight the segment on |
| // Firefox. |
| const guint kForegroundColor = 0x000000; |
| ibus_text_append_attribute(text, |
| IBUS_ATTR_TYPE_FOREGROUND, |
| kForegroundColor, |
| start, |
| end); |
| } |
| start = end; |
| } |
| |
| return text; |
| } |
| |
| // Returns a cursor position used for updating preedit. |
| // NOTE: We do not use a cursor position obtained from Mozc when the candidate |
| // window is shown since ibus uses the cursor position to locate the candidate |
| // window and the position obtained from Mozc is not what we expect. |
| int CursorPos(const commands::Output &output) { |
| if (!output.has_preedit()) { |
| return 0; |
| } |
| if (output.preedit().has_highlighted_position()) { |
| return output.preedit().highlighted_position(); |
| } |
| return output.preedit().cursor(); |
| } |
| |
| } // namespace |
| |
| PreeditHandler::PreeditHandler() { |
| } |
| |
| PreeditHandler::~PreeditHandler() { |
| } |
| |
| bool PreeditHandler::Update(IBusEngine *engine, |
| const commands::Output &output) { |
| if (!output.has_preedit()) { |
| ibus_engine_hide_preedit_text(engine); |
| return true; |
| } |
| IBusText *text = ComposePreeditText(output.preedit()); |
| ibus_engine_update_preedit_text_with_mode(engine, text, CursorPos(output), |
| TRUE, IBUS_ENGINE_PREEDIT_COMMIT); |
| // |text| is released by ibus_engine_update_preedit_text. |
| return true; |
| } |
| |
| } // namespace ibus |
| } // namespace mozc |