Aegisub/src/text_selection_controller.cpp

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// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "text_selection_controller.h"
#include <wx/stc/stc.h>
void TextSelectionController::SetControl(wxStyledTextCtrl *ctrl) {
this->ctrl = ctrl;
if (ctrl)
ctrl->Bind(wxEVT_STC_UPDATEUI, &TextSelectionController::UpdateUI, this);
}
TextSelectionController::~TextSelectionController() {
if (ctrl) ctrl->Unbind(wxEVT_STC_UPDATEUI, &TextSelectionController::UpdateUI, this);
}
#define GET(var, new_value) do { \
int tmp = new_value; \
if (tmp != var) { \
var = tmp; \
changed = true; \
} \
} while(false)
#define SET(var, new_value, Setter) do { \
if (var != new_value) { \
var = new_value; \
if (ctrl) ctrl->Setter(var); \
} \
} while (false)
void TextSelectionController::UpdateUI(wxStyledTextEvent &evt) {
if (changing) return;
bool changed = false;
GET(insertion_point, ctrl->GetInsertionPoint());
if (evt.GetUpdated() & wxSTC_UPDATE_SELECTION) {
GET(selection_start, ctrl->GetSelectionStart());
GET(selection_end, ctrl->GetSelectionEnd());
}
else {
GET(selection_start, insertion_point);
GET(selection_end, insertion_point);
}
if (changed) AnnounceSelectionChanged();
}
void TextSelectionController::SetInsertionPoint(int position) {
changing = true;
SET(insertion_point, position, SetInsertionPoint);
changing = false;
AnnounceSelectionChanged();
}
void TextSelectionController::SetSelection(int start, int end) {
changing = true;
SET(selection_start, start, SetSelectionStart);
SET(selection_end, end, SetSelectionEnd);
changing = false;
AnnounceSelectionChanged();
}