Aegisub/aegisub/src/scintilla_text_ctrl.cpp

// Copyright (c) 2007, Rodrigo Braz Monteiro
// All rights reserved.
//
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//     this list of conditions and the following disclaimer.
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// Aegisub Project http://www.aegisub.org/

/// @file scintilla_text_ctrl.cpp
/// @brief Customised version of wxStyledTextControl used for main edit box
/// @ingroup custom_control
///

#include "config.h"

#include "scintilla_text_ctrl.h"
#include "utils.h"

ScintillaTextCtrl::ScintillaTextCtrl(wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style)
: wxStyledTextCtrl(parent, id, pos, size, style, value)
{
	Bind(wxEVT_MOUSEWHEEL, &ScintillaTextCtrl::OnMouseWheel, this);
}

/// @brief Get unicode-compatible position
int ScintillaTextCtrl::GetUnicodePosition(int pos) {
	return GetText().Left(pos).utf8_str().length();
}

/// @brief Reverse unicode-compatible position
int ScintillaTextCtrl::GetReverseUnicodePosition(int pos) {
	wxCharBuffer buffer = GetTextRaw();
	return wxString::FromUTF8(buffer.data(), std::min<int>(pos, buffer.length())).length();
}

/// @brief Start unicode-safe styling
void ScintillaTextCtrl::StartUnicodeStyling(int start,int mask) {
	StartStyling(GetUnicodePosition(start),mask);
	// Cache the text for styling as GetText is hideously slow
	text = GetText();
}

/// @brief Unicode-safe styling
void ScintillaTextCtrl::SetUnicodeStyling(int start,int length,int style) {
	// Get the real length
	int len = text.Mid(start, length).utf8_str().length();

	// Set styling
	SetStyling(len,style);
}

/// @brief Set selection, unicode-aware
void ScintillaTextCtrl::SetSelectionU(int start, int end) {
	SetSelection(GetUnicodePosition(start),GetUnicodePosition(end));
}

void ScintillaTextCtrl::OnMouseWheel(wxMouseEvent& evt) {
	if (ForwardMouseWheelEvent(this, evt)) {
		// Skip the event so that wxSTC's default mouse wheel handler is hit
		evt.Skip();
	}
}