/// <summary>
/// Ensure that low >= high (swap them if they are not)
/// </summary>
public static void FixOrder(ref TokenLoc low, ref TokenLoc high)
{
if (low > high)
{
TokenLoc temp = low;
low = high;
high = temp;
}
}
/// <summary>
/// Moves to the next char location.
/// </summary>
public void Inc()
{
if (Location.Line >= mLines.Length)
{
Location = new TokenLoc();
return;
}
Location.Char++;
if (Location.Char > mLines[Location.Line].Length)
{
Location.Char = 0;
Location.Line++;
}
}
/// <summary>
/// Check to see if 'find' matches the text in 'text'.
/// Returns TRUE if they match, FALSE if not.
/// Changes the current scan locations, does not always set matchEnd
/// </summary>
bool MatchInternal(Scanner text, Scanner find, ref TokenLoc matchEnd)
{
// Verify we are at the start of a word (if requested)
if (checkMatchWholeWord.Checked)
{
text.Location.Char--;
if (!IsWordSeparator(text.Peek()))
{
return(false);
}
text.Location.Char++;
}
// Scan until we find a match or find the end
bool matchCase = checkMatchCase.Checked;
bool found = true;
while (!find.AtEnd())
{
char findPeek = find.Peek();
char textPeek = text.Peek();
if (!matchCase)
{
findPeek = char.ToUpper(findPeek);
textPeek = char.ToUpper(textPeek);
}
if (findPeek != textPeek)
{
found = false;
break;
}
find.Inc();
text.Inc();
}
// Verify we are at the end of a word (if requested)
if (checkMatchWholeWord.Checked && found)
{
return(IsWordSeparator(text.Peek()));
}
return(found);
}
/// <summary>
/// Check to see if 'find' matches the text in 'text'.
/// Returns TRUE if they match, FALSE if not.
/// Does not change the current scan locations
/// </summary>
bool Match(Scanner text, Scanner find, ref TokenLoc matchEnd)
{
// Save original locations
TokenLoc textLoc = text.Location;
TokenLoc findLoc = find.Location;
matchEnd = textLoc;
bool found = MatchInternal(text, find, ref matchEnd);
// Restore text locations, return result
if (found)
{
matchEnd = text.Location;
}
text.Location = textLoc;
find.Location = findLoc;
return(found);
}
/// <summary>
/// Gets a section of text.
/// </summary>
public string[] GetText(TokenLoc start, TokenLoc end)
{
// Bounds check parameters
start.Line = Bound(start.Line, 0, mLines.Count - 1);
start.Char = Bound(start.Char, 0, mLines[start.Line].Length);
end.Line = Bound(end.Line, 0, mLines.Count - 1);
end.Char = Bound(end.Char, 0, mLines[end.Line].Length);
if (end.Line < start.Line)
{
end.Line = start.Line;
}
if (start.Line == end.Line && end.Char < start.Char)
{
end.Char = start.Char;
}
int startIndex = start.Char;
int endIndex = end.Char;
if (start.Line == end.Line && startIndex >= endIndex)
{
return(new string[0]);
}
if (start.Line == end.Line)
{
return(new string[] { mLines[start.Line].Substring(startIndex, endIndex - startIndex) });
}
// Break up the first and last line at the start position
string [] lines = new string[end.Line - start.Line + 1];
lines[0] = mLines[start.Line].Substring(startIndex);
for (int i = 1; i < lines.Length - 1; i++)
{
lines[i] = mLines[start.Line + i];
}
lines[end.Line - start.Line] = mLines[end.Line].Substring(0, endIndex);
return(lines);
}
/// <summary>
/// Call this function to show the search form
/// </summary>
public static void Show(Form owner, Editor editor)
{
// Create the form
if (mFormSearch == null || mFormSearch.IsDisposed)
{
mFormSearch = new FormSearch();
}
// Display the form (possibly with a new owner)
mFormSearch.mEditor = editor;
if (owner != mFormSearch.Owner)
{
mFormSearch.Visible = false;
}
if (!mFormSearch.Visible)
{
mFormSearch.Show(owner);
}
// Take selected text for search box (if any)
TokenLoc selStart = editor.SelStart;
TokenLoc selEnd = editor.SelEnd;
if (selStart != selEnd && selStart.Line == selEnd.Line)
{
string [] search = editor.Lexer.GetText(selStart, selEnd);
if (search.Length == 1)
{
mFormSearch.textSearch.Text = search[0];
}
}
// Set search box focus
mFormSearch.textSearch.Focus();
mFormSearch.textSearch.SelectAll();
}
/// <summary>
/// Start a new search whenever the search text changes
/// </summary>
private void textSearch_TextChanged(object sender, EventArgs e)
{
mPreviousSearchLoc = new TokenLoc(-1, -1);
}
/// <summary>
/// Find Next
/// </summary>
void FindNext(Form messageBoxParent)
{
// Find start location (cursor or beginning of selected text)
TokenLoc start = mEditor.CursorLoc;
if (mEditor.HasSel())
{
start = mEditor.SelStart;
}
// Start new search?
if (mPreviousSearchLoc != start)
{
mPreviousSearchLoc = new TokenLoc(-1, -1);
mStartSearchLoc = start;
}
// Create text scanner
Scanner text = new Scanner(mEditor.Lexer.GetText());
text.Location = start;
// Create search string scanner
List <string> findList = new List <string>();
findList.Add(textSearch.Text);
Scanner find = new Scanner(findList.ToArray());
// Skip first char to move past previous search
if (mEditor.HasSel())
{
text.Inc();
}
// Scan for a match
TokenLoc matchEnd = new TokenLoc();
bool firstChar = true;
bool pastEnd = false;
while (true)
{
// Past end of previous search?
if (!firstChar && text.Location == start)
{
MessageBox.Show(messageBoxParent,
"The search text was not found", Text);
return;
}
if (!firstChar && text.Location == mStartSearchLoc)
{
pastEnd = true;
}
// Found match?
if (Match(text, find, ref matchEnd))
{
mEditor.SelSet(text.Location, matchEnd);
mEditor.CursorLoc = text.Location;
mPreviousSearchLoc = text.Location;
if (pastEnd)
{
MessageBox.Show(messageBoxParent,
"Find reached the starting point of the search", Text);
}
return;
}
text.Inc();
firstChar = false;
}
}
/// <summary>
/// Replace a section of text. This function is used to insert,
/// delete, and change a section of text. It will re-analyze the
/// text (replacing all tokens on all lines that were changed)
/// and updating the positions of the tokens.
/// RETURNS: The new end location of the inserted text
/// </summary>
public TokenLoc ReplaceText(string[] replacementText,
TokenLoc start, TokenLoc end)
{
// Bounds check parameters
start.Line = Bound(start.Line, 0, mLines.Count - 1);
start.Char = Bound(start.Char, 0, mLines[start.Line].Length);
end.Line = Bound(end.Line, 0, mLines.Count - 1);
end.Char = Bound(end.Char, 0, mLines[end.Line].Length);
if (end.Line < start.Line)
{
end.Line = start.Line;
}
if (start.Line == end.Line && end.Char < start.Char)
{
end.Char = start.Char;
}
int startIndex = start.Char;
int endIndex = end.Char;
// Adjust first line
if (start.Line != end.Line || startIndex != endIndex)
{
mLines[start.Line] = mLines[start.Line].Substring(0, startIndex)
+ mLines[end.Line].Substring(endIndex);
}
// Remove unused lines
if (start.Line != end.Line)
{
mLines.RemoveRange(start.Line + 1, end.Line - start.Line);
mTokens.RemoveRange(start.Line + 1, end.Line - start.Line);
}
// Start and end are the same
end.Line = start.Line;
endIndex = startIndex;
// Insert new text
if (replacementText != null && replacementText.Length != 0)
{
// Break up the first line at the start position
string startStr = mLines[start.Line].Substring(0, startIndex);
string endStr = mLines[start.Line].Substring(startIndex);
if (replacementText.Length <= 1)
{
mLines[start.Line] = startStr + replacementText[0] + endStr;
endIndex = startStr.Length + replacementText[0].Length;
}
else
{
// Insert new lines
mLines[start.Line] = startStr + replacementText[0];
for (int i = 1; i < replacementText.Length; i++)
{
mLines.Insert(start.Line + i, replacementText[i]);
mTokens.Insert(start.Line + i, new List <Token>());
}
end.Line = start.Line + replacementText.Length - 1;
endIndex = replacementText[replacementText.Length - 1].Length;
mLines[end.Line] += endStr;
}
}
// Re-scan the updated text lines
for (int i = start.Line; i <= end.Line; i++)
{
mTokens[i] = ScanLine(mLines[i], i);
}
// Re-adjust token line positions
for (int i = start.Line; i < mTokens.Count; i++)
{
foreach (Token token in mTokens[i])
{
token.Line = i;
}
}
// Calculate end of inserted text
end.Char = endIndex;
return(end);
}
