HaikuDepot: Added work-in-progress TextEditor class
The intention here is to be able to set it on a TextDocumentView to add editing capabilities.
This commit is contained in:
Stephan Aßmus
parent
85ad88c67e
commit
130db54051
@ -26,6 +26,8 @@ local textDocumentSources =
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TextDocument.cpp
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TextDocumentLayout.cpp
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TextDocumentView.cpp
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TextEditor.cpp
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TextSelection.cpp
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TextSpan.cpp
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TextView.cpp
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;
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345
src/apps/haiku-depot/textview/TextEditor.cpp
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345
src/apps/haiku-depot/textview/TextEditor.cpp
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@ -0,0 +1,345 @@
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/*
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* Copyright 2014, Stephan Aßmus <superstippi@gmx.de>.
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* All rights reserved. Distributed under the terms of the MIT License.
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*/
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#include "TextEditor.h"
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#include <algorithm>
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TextEditor::TextEditor()
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:
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fDocument(),
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fLayout(),
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fSelection(),
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fCaretAnchorX(0.0f),
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fStyleAtCaret()
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{
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}
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TextEditor::TextEditor(const TextEditor& other)
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:
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fDocument(other.fDocument),
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fLayout(other.fLayout),
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fSelection(other.fSelection),
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fCaretAnchorX(other.fCaretAnchorX),
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fStyleAtCaret(other.fStyleAtCaret)
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{
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}
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TextEditor&
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TextEditor::operator=(const TextEditor& other)
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{
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if (this == &other)
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return *this;
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fDocument = other.fDocument;
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fLayout = other.fLayout;
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fSelection = other.fSelection;
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fCaretAnchorX = other.fCaretAnchorX;
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fStyleAtCaret = other.fStyleAtCaret;
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return *this;
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}
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bool
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TextEditor::operator==(const TextEditor& other) const
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{
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if (this == &other)
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return true;
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return fDocument == other.fDocument
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&& fLayout == other.fLayout
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&& fSelection == other.fSelection
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&& fCaretAnchorX == other.fCaretAnchorX
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&& fStyleAtCaret == other.fStyleAtCaret;
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}
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bool
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TextEditor::operator!=(const TextEditor& other) const
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{
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return !(*this == other);
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}
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// #pragma mark -
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void
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TextEditor::SetDocument(const TextDocumentRef& ref)
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{
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fDocument = ref;
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SetSelection(TextSelection());
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}
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void
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TextEditor::SetLayout(const TextDocumentLayoutRef& ref)
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{
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fLayout = ref;
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SetSelection(TextSelection());
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}
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void
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TextEditor::SetSelection(TextSelection selection)
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{
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_SetSelection(selection.Caret(), selection.Anchor(), true, true);
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}
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void
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TextEditor::SetCharacterStyle(::CharacterStyle style)
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{
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if (fStyleAtCaret == style)
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return;
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fStyleAtCaret = style;
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if (fSelection.Caret() != fSelection.Anchor()) {
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// TODO: Apply style to selection range
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}
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}
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void
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TextEditor::KeyDown(KeyEvent event)
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{
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if (fDocument.Get() == NULL)
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return;
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bool select = (event.modifiers & B_SHIFT_KEY) != 0;
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switch (event.key) {
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case B_UP_ARROW:
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_LineUp(select);
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break;
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case B_DOWN_ARROW:
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_LineDown(select);
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break;
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case B_LEFT_ARROW:
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if (_HasSelection() && !select) {
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_SetCaretOffset(
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std::min(fSelection.Caret(), fSelection.Anchor()),
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true, false, true
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);
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} else
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_SetCaretOffset(fSelection.Caret() - 1, true, select, true);
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break;
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case B_RIGHT_ARROW:
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if (_HasSelection() && !select) {
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_SetCaretOffset(
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std::max(fSelection.Caret(), fSelection.Anchor()),
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true, false, true
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);
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} else
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_SetCaretOffset(fSelection.Caret() + 1, true, select, true);
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break;
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case B_HOME:
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_LineStart(select);
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break;
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case B_END:
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_LineEnd(select);
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break;
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case B_ENTER:
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Insert(fSelection.Caret(), "\n");
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break;
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case B_TAB:
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// TODO: Tab support in TextLayout
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Insert(fSelection.Caret(), " ");
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break;
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case B_ESCAPE:
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break;
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case B_BACKSPACE:
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if (_HasSelection()) {
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Remove(_SelectionStart(), _SelectionLength());
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} else {
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if (fSelection.Caret() > 0)
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Remove(fSelection.Caret() - 1, 1);
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}
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break;
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case B_DELETE:
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if (_HasSelection()) {
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Remove(_SelectionStart(), _SelectionLength());
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} else {
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if (fSelection.Caret() < fDocument->Length())
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Remove(fSelection.Caret(), 1);
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}
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break;
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case B_INSERT:
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// TODO: Toggle insert mode (or maybe just don't support it)
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break;
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case B_PAGE_UP:
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case B_PAGE_DOWN:
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case B_SUBSTITUTE:
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case B_FUNCTION_KEY:
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case B_KATAKANA_HIRAGANA:
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case B_HANKAKU_ZENKAKU:
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break;
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default:
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if (event.bytes != NULL && event.length > 0) {
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// Handle null-termintating the string
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BString text(event.bytes, event.length);
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Insert(fSelection.Caret(), text);
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}
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break;
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}
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}
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void
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TextEditor::Insert(int32 offset, const BString& string)
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{
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// TODO: ...
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}
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void
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TextEditor::Remove(int32 offset, int32 length)
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{
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// TODO: ...
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}
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// #pragma mark - private
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// _SetCaretOffset
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void
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TextEditor::_SetCaretOffset(int32 offset, bool updateAnchor,
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bool lockSelectionAnchor, bool updateSelectionStyle)
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{
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if (fDocument.Get() == NULL)
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return;
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if (offset < 0)
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offset = 0;
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int32 textLength = fDocument->Length();
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if (offset > textLength)
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offset = textLength;
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int32 caret = offset;
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int32 anchor = lockSelectionAnchor ? fSelection.Anchor() : offset;
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_SetSelection(caret, anchor, updateAnchor, updateSelectionStyle);
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}
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// _SetSelection
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void
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TextEditor::_SetSelection(int32 caret, int32 anchor, bool updateAnchor,
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bool updateSelectionStyle)
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{
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if (fLayout.Get() == NULL)
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return;
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if (caret == fSelection.Caret() && caret == fSelection.Anchor())
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return;
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fSelection.SetAnchor(anchor);
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fSelection.SetCaret(caret);
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if (updateAnchor) {
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float x1;
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float y1;
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float x2;
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float y2;
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fLayout->GetTextBounds(caret, x1, y1, x2, y2);
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fCaretAnchorX = x1;
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}
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if (updateSelectionStyle)
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_UpdateStyleAtCaret();
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}
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void
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TextEditor::_UpdateStyleAtCaret()
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{
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if (fDocument.Get() == NULL)
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return;
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int32 offset = fSelection.Caret() - 1;
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if (offset < 0)
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offset = 0;
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SetCharacterStyle(fDocument->CharacterStyleAt(offset));
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}
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// #pragma mark -
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void
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TextEditor::_LineUp(bool select)
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{
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// TODO
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}
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void
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TextEditor::_LineDown(bool select)
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{
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// TODO
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}
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void
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TextEditor::_LineStart(bool select)
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{
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// TODO
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}
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void
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TextEditor::_LineEnd(bool select)
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{
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// TODO
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}
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// #pragma mark -
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bool
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TextEditor::_HasSelection() const
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{
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return _SelectionLength() > 0;
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}
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int32
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TextEditor::_SelectionStart() const
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{
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return std::min(fSelection.Caret(), fSelection.Anchor());
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}
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int32
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TextEditor::_SelectionEnd() const
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{
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return std::max(fSelection.Caret(), fSelection.Anchor());
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}
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int32
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TextEditor::_SelectionLength() const
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{
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return _SelectionEnd() - _SelectionStart();
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}
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85
src/apps/haiku-depot/textview/TextEditor.h
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85
src/apps/haiku-depot/textview/TextEditor.h
Normal file
@ -0,0 +1,85 @@
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/*
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* Copyright 2014, Stephan Aßmus <superstippi@gmx.de>.
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* All rights reserved. Distributed under the terms of the MIT License.
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*/
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#ifndef TEXT_EDITOR_H
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#define TEXT_EDITOR_H
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#include "CharacterStyle.h"
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#include "TextDocument.h"
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#include "TextDocumentLayout.h"
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#include "TextSelection.h"
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class KeyEvent {
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public:
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const char* bytes;
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int32 length;
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int32 key;
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int32 modifiers;
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};
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class TextEditor {
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public:
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TextEditor();
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TextEditor(const TextEditor& other);
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TextEditor& operator=(const TextEditor& other);
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bool operator==(const TextEditor& other) const;
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bool operator!=(const TextEditor& other) const;
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void SetDocument(const TextDocumentRef& ref);
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TextDocumentRef Document() const
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{ return fDocument; }
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void SetLayout(
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const TextDocumentLayoutRef& ref);
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TextDocumentLayoutRef Layout() const
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{ return fLayout; }
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void SetSelection(TextSelection selection);
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inline TextSelection Selection() const
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{ return fSelection; }
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void SetCharacterStyle(::CharacterStyle style);
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::CharacterStyle CharacterStyle() const
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{ return fStyleAtCaret; }
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void KeyDown(KeyEvent event);
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void Insert(int32 offset, const BString& string);
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void Remove(int32 offset, int32 length);
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private:
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void _SetCaretOffset(int32 offset,
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bool updateAnchor,
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bool lockSelectionAnchor,
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bool updateSelectionStyle);
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void _SetSelection(int32 caret, int32 anchor,
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bool updateAnchor,
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bool updateSelectionStyle);
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void _UpdateStyleAtCaret();
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void _LineUp(bool select);
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void _LineDown(bool select);
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void _LineStart(bool select);
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void _LineEnd(bool select);
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bool _HasSelection() const;
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int32 _SelectionStart() const;
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int32 _SelectionEnd() const;
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int32 _SelectionLength() const;
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private:
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TextDocumentRef fDocument;
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TextDocumentLayoutRef fLayout;
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TextSelection fSelection;
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float fCaretAnchorX;
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::CharacterStyle fStyleAtCaret;
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};
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#endif // TEXT_EDITOR_H
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