forked from mia/Aegisub
c0fa794e45
Putting this logic for delaying changes in the TextSelectionController isn't the cleanest, but all attempts at saving this state somewhere in the Lua API instead turned out even worse. Also, the logic for inverted selections probably does belong in there.
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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