[Examples] Count of characters and words

[Sergey Tkachenko]

Calculating a number of characters

Code: Select all

uses CRVData;

function GetCharCount(RVData: TCustomRVData): Integer;
var i,r,c: Integer;
     table: TRVTableItemInfo;
begin
Result := 0;
for i := 0 to RVData.Items.Count-1 do
  if RVData.GetItemStyle(i)>=0 then begin // this is a text item
    inc(Result, RVData.GetItemTextLength(i))
  else if RVData.GetItemStyle(i)=rvsTab then 
    inc(Result)
  else if RVData.GetItemStyle(i)=rvsTable then begin
    table := TRVTableItemInfo(RVData.GetItem(i));
    for r := 0 to table.Rows.Count-1 do
      for c := 0 to table.Rows[r].Count-1 do
        if table.Cells[r,c]<>nil then
          inc(Result, GetCharCount(table.Cells[r,c].GetRVData));
  end;
end;

Call:

Code: Select all

r := GetCharCount(RichView.RVData);

This function does not count images, etc.

Updated 2017-02-15 for compatibility with TRichView 16.13. For older versions of TRichView, use ItemLength instead of GetItemTextLength

[Sergey Tkachenko]

Calculating a number of words

You can use a class from RVWordEnum.pas

Create a class

Code: Select all

TWordCounter = class(TRVWordEnumerator)
private
    FCounter: Integer;
protected
    function ProcessWord: Boolean; override;
public
   function GetWordCount(rve: TCustomRichViewEdit): Integer;
end;

function TWordCounter.ProcessWord: Boolean;
begin
  inc(FCounter);
  Result := True;
end;

function TWordCounter.GetWordCount(rve: TCustomRichViewEdit): Integer;
begin
  FCounter := 0;
  Run(rve, rvesFromStart);
  Result := FCounter;
end;

(this function treats word written with two different fonts as two words)

Call:

Code: Select all

var wcnt: TWordCounter;

wcnt := TWordCounter.Create;
r := wcnt.GetWordCount(RichViewEdit1);
wcnt.Free;

[christopher00]

Calculating a number of characters

Code: Select all

uses CRVData;

function GetCharCount(RVData: TCustomRVData): Integer;
var i,r,c: Integer;
     table: TRVTableItemInfo;
begin
Result := 0;
for i := 0 to RVData.Items.Count-1 do
  if RVData.GetItemStyle(i)>=0 then begin // this is a text item
    inc(Result, RVData.ItemLength(i))
  else if RVData.GetItemStyle(i)=rvsTable then begin
    table := TRVTableItemInfo(RVData.GetItem(i));
    for r := 0 to table.Rows.Count-1 do
      for c := 0 to table.Rows[r].Count-1 do
        if table.Cells[r,c]<>nil then
          inc(Result, GetCharCount(table.Cells[r,c].GetRVData));
  end;
end;

Call:

Code: Select all

r := GetCharCount(RichView.RVData);

This function does not count images, etc.

Will this function count the characters in a TRichViewEdit? The word count function looks like it would.

[Sergey Tkachenko]

Yes, it can be used for TRichViewEdit too.

PS: I just modified it to take tab characters into account. Line breaks are still not counted.

[beboyle]

This pair of functions counts the number of words and characters in a TRichViewEdit control. The WordCount function is just a generic routine to return word count from any text. The second is fired when the text changes. It loops through the text items in the RVE and passes each to WordCount and totals up the results.

Code: Select all

// Function to provide word count from memo or text field
function WordCount(t: String): LongInt;
var
  ws: Boolean;
  wc: Integer;
  i: Integer;
begin
  ws := True; // In whitespace
  wc := 0;
  for i := 0 to Length(t) - 1 do
  begin
    if t[i] in [' ', #9, #10, #13] then
         ws := True
    else if ws then
      begin
        ws := False;
        Inc(wc);
      end;
  end;
    Result := wc;
end;

// Change in text - count words and characters.
procedure Tform1.RVEChange(Sender: TObject);
var
  wc, cc: LongInt;
  I: Integer;
begin
  cc := 0;
  wc := 0;
  with RVE do
  begin
    for I := 0 to RVData.Items.Count - 1 do
      if RVData.GetItemStyle(I) >= 0 then
      begin
        inc (cc, RVData.GetItemTextLength(I));
        inc (wc, WordCount(RVData.GetItemTextA(I)));
      end;
  end;
  lbCount.Caption := IntToStr(cc) + ' characters, ' + IntToStr(wc) + ' words.';
end;

Updated 2017-02-15 for compatibility with TRichView 16.13. For older versions of TRichView, use ItemLength instead of GetItemTextLength

[Sergey Tkachenko]

Calculating a number of words in the selection.

Code: Select all

uses RVWordEnum, RVTable, CRVFData;

type
  TSelWordCounter = class(TRVWordEnumerator)
  private
    FCounter: Integer;
    FSelRVData: TCustomRVFormattedData;
    FSelStartItemNo, FSelStartOffs, FSelEndItemNo, FSelEndOffs: Integer;
  protected
    function ProcessWord: Boolean; override;
  public
    function GetWordCount(rve: TCustomRichViewEdit): Integer;
  end;

function TSelWordCounter.ProcessWord: Boolean;
begin
  Result :=
    not
    (
     (FRVData=FSelRVData) and
     ((FItemNo>FSelEndItemNo) or ((FItemNo=FSelEndItemNo) and (FStartOffs>=FSelEndOffs)))
    );
  if Result then
    inc(FCounter);
end;

function TSelWordCounter.GetWordCount(rve: TCustomRichViewEdit): Integer;
var table: TRVTableItemInfo;
    r, c: Integer;
begin
  Result   := 0;
  FCounter := 0;
  rve := rve.TopLevelEditor;
  if rve.RVData.PartialSelectedItem<>nil then begin
    // multicell selection
    FSelRVData := nil;
    table := rve.RVData.PartialSelectedItem as TRVTableItemInfo;
    for r := 0 to table.RowCount-1 do
      for c := 0 to table.ColCount-1 do
        if (table.Cells[r,c]<>nil) and table.IsCellSelected(r, c) then
          RunRVData(rve, table.Cells[r,c], 0, table.Cells[r,c].GetOffsBeforeItem(0));
    end
  else begin
    if not rve.SelectionExists then
      exit;
    // normal selection
    FSelRVData := rve.RVData;
    FSelRVData.GetSelectionBoundsEx(FSelStartItemNo, FSelStartOffs,
      FSelEndItemNo, FSelEndOffs, True);
    RunRVData(rve, rve.RVData, FSelStartItemNo, FSelStartOffs);
  end;
  Result := FCounter;
end;

[sr1111]

I used this function in the delphi2009 error

[DCC Warning] Unit3.pas(777): W1050 WideChar reduced to byte char in set expressions. Consider using 'CharInSet' function in 'SysUtils' unit.

can you fix this function


function WordCount(t: String): LongInt;
var
ws: Boolean;
wc: Integer;
i: Integer;
begin
ws := True; // In whitespace
wc := 0;
for i := 0 to Length(t) - 1 do
begin
if t in [' ', #9, #10, #13] then
ws := True
else if ws then
begin
ws := False;
Inc(wc);
end;
end;
Result := wc;
end;

[chmichael]

It is possible to save both counts into the RVF file for performance reasons ?

[Sergey Tkachenko]

You can save any additional information in DocProperties

[chmichael]

Thanks!

[Petko]

It is possible to count lines and paragraphs too, and if yes, do you think that it will be too time consuming when working with large documents (compared to char and word count)?

[Sergey Tkachenko]

No, it will be fast.
Count of lines - do you mean lines that depend on word wrapping?

How do you want to calculate the count of paragraphs and lines for tables?

[Petko]

I need something similar to Word's word count. I've made a test and it seems to work like this:

* Lines - they depend on word wrapping and each table cell is counted as a line, if the cell is empty
* Paragraphs - it seems that only items, containing text are counted as paragraphs (empty table cells are not)

You can see my test file here:
http://www.box.net/shared/v9ximbdj0f

Anyway, absolute accuracy is not necessary, speed is priority here. People using a word count function need accuracy in the word and character counts more.

[Sergey Tkachenko]

I created functions calculating these values in the most natural way for TRichView. It may be different from Word.

Paragraph count

Code: Select all

uses CRVData, RVTable;

function GetParagraphCount(RVData: TCustomRVData): Integer;
var i,r,c: Integer;
  table: TRVTableItemInfo;
begin
  Result := 0;
  for i := 0 to RVData.ItemCount-1 do 
  begin
    if RVData.IsParaStart(i) then
      inc(Result);
    if RVData.GetItem(i) is TRVTableItemInfo then 
    begin
      table := TRVTableItemInfo(RVData.GetItem(i));
      for r := 0 to table.RowCount-1 do
        for c := 0 to table.ColCount-1 do
          if table.Cells[r,c]<>nil then
            inc(Result, GetParagraphCount(table.Cells[r,c].GetRVData));
    end;
  end;
end;

Use: Count := GetParagraphCount(RichViewEdit1.RVData);
In the show-special-characters mode, you can see pilcrow characters at the end of paragraphs. GetParagraphCount returns the count of these characters. Note that they are displayed in places where MS Word does not display them:
- at the end of table cells
- at the end of tables.

[Sergey Tkachenko]

Line count

Code: Select all

uses CRVFData, RVTable, DLines;

function GetLineCount(RVData: TCustomRVFormattedData): Integer;
var i,r,c: Integer;
  table: TRVTableItemInfo;
begin
  Result := 0;
  for i := 0 to RVData.DrawItems.Count-1 do
  begin
    if RVData.DrawItems[i].FromNewLine then
      inc(Result);
    if RVData.GetItem(RVData.DrawItems[i].ItemNo) is TRVTableItemInfo then 
    begin
      table := TRVTableItemInfo(RVData.GetItem(RVData.DrawItems[i].ItemNo));
      for r := 0 to table.RowCount-1 do
        for c := 0 to table.ColCount-1 do
          if table.Cells[r,c]<>nil then
            inc(Result, GetLineCount(TCustomRVFormattedData(table.Cells[r,c].GetRVData)));
    end;
  end;
end;

Use: Count := GetLineCount(RichViewEdit1.RVData);

This code uses some undocumented methods.