forked from mia/Aegisub
64 lines
2.6 KiB
C++
64 lines
2.6 KiB
C++
// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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#include <libaegisub/signal.h>
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class wxStyledTextCtrl;
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class wxStyledTextEvent;
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class TextSelectionController {
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int selection_start = 0;
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int selection_end = 0;
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int insertion_point = 0;
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bool changing = false;
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int staged_selection_start = 0;
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int staged_selection_end = 0;
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bool has_staged_selection = false;
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wxStyledTextCtrl *ctrl = nullptr;
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void UpdateUI(wxStyledTextEvent &evt);
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agi::signal::Signal<> AnnounceSelectionChanged;
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public:
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void SetSelection(int start, int end);
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void SetInsertionPoint(int point);
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// This set of functions allows staging changes to the selection or insertion points, which can then be applied later.
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// This is useful when one is still waiting on other changes to be applied, but already listening for changes to the
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// selection in the eventually visible text.
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// They also provide a wrapper for setting a selection whose insertion point is on the left side.
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void StageSetSelection(int start, int end) { staged_selection_start = start; staged_selection_end = end; has_staged_selection = true; };
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void StageSetInsertionPoint(int point) { StageSetSelection(point, point); };
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void CommitStagedChanges();
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void DropStagedChanges() { has_staged_selection = false; };
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int GetSelectionStart() const { return selection_start; }
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int GetSelectionEnd() const { return selection_end; }
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int GetInsertionPoint() const { return insertion_point; }
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int GetStagedSelectionStart() const { return has_staged_selection ? staged_selection_start : selection_start; }
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int GetStagedSelectionEnd() const { return has_staged_selection ? staged_selection_end : selection_end; }
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int GetStagedInsertionPoint() const { return has_staged_selection ? staged_selection_end : insertion_point; }
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void SetControl(wxStyledTextCtrl *ctrl);
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~TextSelectionController();
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DEFINE_SIGNAL_ADDERS(AnnounceSelectionChanged, AddSelectionListener)
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};
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