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-rw-r--r--src/textbuf.cpp52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/textbuf.cpp b/src/textbuf.cpp
index d9069755a..dc1d7a7cb 100644
--- a/src/textbuf.cpp
+++ b/src/textbuf.cpp
@@ -39,6 +39,29 @@ bool Textbuf::CanDelChar(bool backspace)
}
/**
+ * Get the next character that will be removed by DelChar.
+ * @param backspace if set, delete the character before the caret,
+ * otherwise, delete the character after it.
+ * @return the next character that will be removed by DelChar.
+ * @warning You should ensure Textbuf::CanDelChar returns true before calling this function.
+ */
+WChar Textbuf::GetNextDelChar(bool backspace)
+{
+ assert(this->CanDelChar(backspace));
+
+ const char *s;
+ if (backspace) {
+ s = Utf8PrevChar(this->buf + this->caretpos);
+ } else {
+ s = this->buf + this->caretpos;
+ }
+
+ WChar c;
+ Utf8Decode(&c, s);
+ return c;
+}
+
+/**
* Delete a character at the caret position in a text buf.
* @param backspace if set, delete the character before the caret,
* else delete the character after it.
@@ -85,6 +108,35 @@ bool Textbuf::DeleteChar(int delmode)
return false;
}
+ if (delmode == (WKC_CTRL | WKC_BACKSPACE) || delmode == (WKC_CTRL | WKC_DELETE)) {
+ bool backspace = delmode == (WKC_CTRL | WKC_BACKSPACE);
+
+ if (!CanDelChar(backspace)) return false;
+
+ /* Unconditionally delete one char to the left. */
+ this->DelChar(backspace);
+ if (!CanDelChar(backspace)) return false;
+ WChar c = this->GetNextDelChar(backspace);
+
+ /* Backspace: Delete left whitespaces.
+ * Delete: Delete right word.
+ */
+ while (backspace ? IsWhitespace(c) : !IsWhitespace(c)) {
+ this->DelChar(backspace);
+ if (!this->CanDelChar(backspace)) return true;
+ c = this->GetNextDelChar(backspace);
+ }
+ /* Backspace: Delete left word.
+ * Delete: Delete right whitespaces.
+ */
+ while (backspace ? !IsWhitespace(c) : IsWhitespace(c)) {
+ this->DelChar(backspace);
+ if (!this->CanDelChar(backspace)) return true;
+ c = this->GetNextDelChar(backspace);
+ }
+ return true;
+ }
+
return false;
}