mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r24519) -Codechange [FS#5203]: Refactor character removal code of text edit
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@ -27,11 +27,27 @@ bool GetClipboardContents(char *buffer, size_t buff_len);
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int _caret_timer;
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/* Delete a character at the caret position in a text buf.
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* If backspace is set, delete the character before the caret,
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* else delete the character after it. */
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/**
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* Checks if it is possible to delete a character.
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* @param backspace if set, delete the character before the caret,
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* otherwise, delete the character after it.
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* @return true if a character can be deleted in the given direction.
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*/
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bool Textbuf::CanDelChar(bool backspace)
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{
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return backspace ? this->caretpos != 0 : this->caretpos < this->bytes - 1;
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}
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/**
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* Delete a character at the caret position in a text buf.
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* @param backspace if set, delete the character before the caret,
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* else delete the character after it.
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* @warning You should ensure Textbuf::CanDelChar returns true before calling this function.
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*/
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void Textbuf::DelChar(bool backspace)
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{
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assert(this->CanDelChar(backspace));
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WChar c;
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char *s = this->buf + this->caretpos;
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@ -60,12 +76,13 @@ void Textbuf::DelChar(bool backspace)
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*/
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bool Textbuf::DeleteChar(int delmode)
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{
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if (delmode == WKC_BACKSPACE && this->caretpos != 0) {
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this->DelChar(true);
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return true;
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} else if (delmode == WKC_DELETE && this->caretpos < this->bytes - 1) {
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this->DelChar(false);
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return true;
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if (delmode == WKC_BACKSPACE || delmode == WKC_DELETE) {
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bool backspace = delmode == WKC_BACKSPACE;
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if (CanDelChar(backspace)) {
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this->DelChar(backspace);
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return true;
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}
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return false;
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}
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return false;
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@ -39,6 +39,7 @@ struct Textbuf {
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void UpdateSize();
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private:
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bool CanDelChar(bool backspace);
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void DelChar(bool backspace);
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bool CanMoveCaretLeft();
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WChar MoveCaretLeft();
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