| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qtextcursor_p.h" |
| 5 | #include "qtextdocument_p.h" |
| 6 | #include "qtextblock_p.h" |
| 7 | |
| 8 | QT_BEGIN_NAMESPACE |
| 9 | |
| 10 | namespace Utils { |
| 11 | |
| 12 | class TextFrame; |
| 13 | class TextTable; |
| 14 | class TextTableCell; |
| 15 | |
| 16 | TextCursor::TextCursor(TextDocument *document) : m_document(document) { } |
| 17 | |
| 18 | bool TextCursor::movePosition(TextCursor::MoveOperation op, TextCursor::MoveMode mode, int n) |
| 19 | { |
| 20 | Q_UNUSED(n); |
| 21 | switch (op) { |
| 22 | case NoMove: |
| 23 | return true; |
| 24 | case Start: |
| 25 | m_position = 0; |
| 26 | break; |
| 27 | case PreviousCharacter: |
| 28 | while (--n >= 0) { |
| 29 | if (m_position == 0) |
| 30 | return false; |
| 31 | --m_position; |
| 32 | } |
| 33 | break; |
| 34 | case End: |
| 35 | m_position = m_document->characterCount(); |
| 36 | break; |
| 37 | case NextCharacter: |
| 38 | while (--n >= 0) { |
| 39 | if (m_position == m_document->characterCount()) |
| 40 | return false; |
| 41 | ++m_position; |
| 42 | } |
| 43 | break; |
| 44 | } |
| 45 | |
| 46 | if (mode == MoveAnchor) |
| 47 | m_anchor = m_position; |
| 48 | |
| 49 | return false; |
| 50 | } |
| 51 | |
| 52 | int TextCursor::position() const |
| 53 | { |
| 54 | return m_position; |
| 55 | } |
| 56 | |
| 57 | void TextCursor::setPosition(int pos, Utils::TextCursor::MoveMode mode) |
| 58 | { |
| 59 | m_position = pos; |
| 60 | if (mode == MoveAnchor) |
| 61 | m_anchor = pos; |
| 62 | } |
| 63 | |
| 64 | QString TextCursor::selectedText() const |
| 65 | { |
| 66 | return m_document->toPlainText().mid(position: qMin(a: m_position, b: m_anchor), n: qAbs(t: m_position - m_anchor)); |
| 67 | } |
| 68 | |
| 69 | void TextCursor::clearSelection() |
| 70 | { |
| 71 | m_anchor = m_position; |
| 72 | } |
| 73 | |
| 74 | TextDocument *TextCursor::document() const |
| 75 | { |
| 76 | return m_document; |
| 77 | } |
| 78 | |
| 79 | void TextCursor::insertText(const QString &text) |
| 80 | { |
| 81 | const QString orig = m_document->toPlainText(); |
| 82 | const QString left = orig.left(n: qMin(a: m_position, b: m_anchor)); |
| 83 | const QString right = orig.mid(position: qMax(a: m_position, b: m_anchor)); |
| 84 | m_document->setPlainText(left + text + right); |
| 85 | } |
| 86 | |
| 87 | TextBlock TextCursor::block() const |
| 88 | { |
| 89 | TextBlock current = m_document->firstBlock(); |
| 90 | while (current.isValid()) { |
| 91 | if (current.position() <= position() |
| 92 | && current.position() + current.length() > current.position()) |
| 93 | break; |
| 94 | current = current.next(); |
| 95 | } |
| 96 | return current; |
| 97 | } |
| 98 | |
| 99 | int TextCursor::positionInBlock() const |
| 100 | { |
| 101 | return m_position - block().position(); |
| 102 | } |
| 103 | |
| 104 | int TextCursor::blockNumber() const |
| 105 | { |
| 106 | return block().blockNumber(); |
| 107 | } |
| 108 | |
| 109 | void TextCursor::removeSelectedText() |
| 110 | { |
| 111 | insertText(text: QString()); |
| 112 | } |
| 113 | |
| 114 | int TextCursor::selectionEnd() const |
| 115 | { |
| 116 | return qMax(a: m_position, b: m_anchor); |
| 117 | } |
| 118 | |
| 119 | bool TextCursor::isNull() const |
| 120 | { |
| 121 | return m_document == nullptr; |
| 122 | } |
| 123 | |
| 124 | } // namespace Utils |
| 125 | |
| 126 | QT_END_NAMESPACE |
| 127 |