125 lines
5.3 KiB
C++
125 lines
5.3 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/** This class is used to invoke a range of text-editor navigation methods on
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an object, based upon a keypress event.
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It's currently used internally by the TextEditor and CodeEditorComponent.
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@tags{GUI}
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*/
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template <class CallbackClass>
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struct TextEditorKeyMapper
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{
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/** Checks the keypress and invokes one of a range of navigation functions that
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the target class must implement, based on the key event.
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*/
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static bool invokeKeyFunction (CallbackClass& target, const KeyPress& key)
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{
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auto mods = key.getModifiers();
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const bool isShiftDown = mods.isShiftDown();
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const bool ctrlOrAltDown = mods.isCtrlDown() || mods.isAltDown();
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int numCtrlAltCommandKeys = 0;
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if (mods.isCtrlDown()) ++numCtrlAltCommandKeys;
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if (mods.isAltDown()) ++numCtrlAltCommandKeys;
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if (key == KeyPress (KeyPress::downKey, ModifierKeys::ctrlModifier, 0) && target.scrollUp()) return true;
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if (key == KeyPress (KeyPress::upKey, ModifierKeys::ctrlModifier, 0) && target.scrollDown()) return true;
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#if JUCE_MAC
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if (mods.isCommandDown() && ! ctrlOrAltDown)
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{
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if (key.isKeyCode (KeyPress::upKey)) return target.moveCaretToTop (isShiftDown);
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if (key.isKeyCode (KeyPress::downKey)) return target.moveCaretToEnd (isShiftDown);
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if (key.isKeyCode (KeyPress::leftKey)) return target.moveCaretToStartOfLine (isShiftDown);
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if (key.isKeyCode (KeyPress::rightKey)) return target.moveCaretToEndOfLine (isShiftDown);
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}
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if (mods.isCommandDown())
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++numCtrlAltCommandKeys;
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#endif
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if (numCtrlAltCommandKeys < 2)
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{
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if (key.isKeyCode (KeyPress::leftKey)) return target.moveCaretLeft (ctrlOrAltDown, isShiftDown);
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if (key.isKeyCode (KeyPress::rightKey)) return target.moveCaretRight (ctrlOrAltDown, isShiftDown);
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if (key.isKeyCode (KeyPress::homeKey)) return ctrlOrAltDown ? target.moveCaretToTop (isShiftDown)
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: target.moveCaretToStartOfLine (isShiftDown);
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if (key.isKeyCode (KeyPress::endKey)) return ctrlOrAltDown ? target.moveCaretToEnd (isShiftDown)
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: target.moveCaretToEndOfLine (isShiftDown);
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}
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if (numCtrlAltCommandKeys == 0)
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{
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if (key.isKeyCode (KeyPress::upKey)) return target.moveCaretUp (isShiftDown);
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if (key.isKeyCode (KeyPress::downKey)) return target.moveCaretDown (isShiftDown);
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if (key.isKeyCode (KeyPress::pageUpKey)) return target.pageUp (isShiftDown);
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if (key.isKeyCode (KeyPress::pageDownKey)) return target.pageDown (isShiftDown);
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}
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if (key == KeyPress ('c', ModifierKeys::commandModifier, 0)
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|| key == KeyPress (KeyPress::insertKey, ModifierKeys::ctrlModifier, 0))
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return target.copyToClipboard();
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if (key == KeyPress ('x', ModifierKeys::commandModifier, 0)
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|| key == KeyPress (KeyPress::deleteKey, ModifierKeys::shiftModifier, 0))
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return target.cutToClipboard();
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if (key == KeyPress ('v', ModifierKeys::commandModifier, 0)
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|| key == KeyPress (KeyPress::insertKey, ModifierKeys::shiftModifier, 0))
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return target.pasteFromClipboard();
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// NB: checking for delete must happen after the earlier check for shift + delete
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if (numCtrlAltCommandKeys < 2)
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{
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if (key.isKeyCode (KeyPress::backspaceKey)) return target.deleteBackwards (ctrlOrAltDown);
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if (key.isKeyCode (KeyPress::deleteKey)) return target.deleteForwards (ctrlOrAltDown);
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}
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if (key == KeyPress ('a', ModifierKeys::commandModifier, 0))
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return target.selectAll();
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if (key == KeyPress ('z', ModifierKeys::commandModifier, 0))
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return target.undo();
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if (key == KeyPress ('y', ModifierKeys::commandModifier, 0)
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|| key == KeyPress ('z', ModifierKeys::commandModifier | ModifierKeys::shiftModifier, 0))
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return target.redo();
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return false;
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}
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};
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} // namespace juce
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