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richview.pas
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richview.pas
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unit RichView;
{$mode Delphi}
interface
{$I RV_Defs.inc}
uses
{$IFDEF FPC}
RVLazIntf, LCLType, LCLIntf,
{$ELSE}
Windows, Messages,
{$ENDIF}
SysUtils, Classes, Graphics, Controls, Forms,
RVStyle, RVScroll, ClipBrd,
{$IFDEF RICHVIEWDEF4}
ImgList,
{$ENDIF}
ExtCtrls;
{------------------------------------------------------------------}
const
rvsBreak = -1;
rvsCheckPoint = -2;
rvsPicture = -3;
rvsHotSpot = -4;
rvsComponent = -5;
rvsBullet = -6;
type
TRichView = class;
TRVSaveFormat = (rvsfText,
rvsfHTML,
rvsfRTF, //<---not yet implemented
rvsfRVF //<---not yet implemented
);
TRVSaveOption = (rvsoOverrideImages);
TRVSaveOptions = set of TRVSaveOption;
{------------------------------------------------------------------}
TDrawLineInfo = class
Left, Top, Width, Height: Integer;
LineNo, Offs: Integer;
FromNewLine: Boolean;
end;
{------------------------------------------------------------------}
TLineInfo = class
StyleNo: Integer;
SameAsPrev: Boolean;
Center: Boolean;
imgNo: Integer; { for rvsJump# used as jump id }
gr: TPersistent;
end;
{------------------------------------------------------------------}
TCPInfo = class
public
Y, LineNo: Integer;
end;
{------------------------------------------------------------------}
TJumpInfo = class
public
l,t,w,h: Integer;
id, idx: Integer;
end;
{------------------------------------------------------------------}
TJumpEvent = procedure (Sender: TObject; id: Integer) of object;
TRVMouseMoveEvent = procedure (Sender: TObject; id: Integer) of object;
TRVSaveComponentToFileEvent = procedure (Sender: TRichView; Path: String; SaveMe: TPersistent; SaveFormat: TRVSaveFormat; var OutStr:String) of object;
TRVURLNeededEvent = procedure (Sender: TRichView; id: Integer; var url:String) of object;
TRVDblClickEvent = procedure (Sender: TRichView; ClickedWord: String; Style: Integer) of object;
TRVRightClickEvent = procedure (Sender: TRichView; ClickedWord: String; Style, X, Y: Integer) of object;
{------------------------------------------------------------------}
TBackgroundStyle = (bsNoBitmap, bsStretched, bsTiled, bsTiledAndScrolled);
{------------------------------------------------------------------}
TRVDisplayOption = (rvdoImages, rvdoComponents, rvdoBullets);
TRVDisplayOptions = set of TRVDisplayOption;
{------------------------------------------------------------------}
TScreenAndDevice = record
ppixScreen, ppiyScreen, ppixDevice, ppiyDevice: Integer;
LeftMargin: Integer;
end;
{------------------------------------------------------------------}
TRVInteger2 = class
public
val: Integer;
end;
{------------------------------------------------------------------}
TRichView = class(TRVScroller)
private
{ Private declarations }
ScrollDelta: Integer;
ScrollTimer: TTimer;
FAllowSelection, FSingleClick: Boolean;
FDelimiters: String;
DrawHover, Selection: Boolean;
FOnJump: TJumpEvent;
FOnRVMouseMove: TRVMouseMoveEvent;
FOnSaveComponentToFile: TRVSaveComponentToFileEvent;
FOnURLNeeded: TRVURLNeededEvent;
FOnRVDblClick: TRVDblClickEvent;
FOnRVRightClick: TRVRightClickEvent;
FOnSelect, FOnResized: TNotifyEvent;
FFirstJumpNo, FMaxTextWidth, FMinTextWidth, FLeftMargin, FRightMargin: Integer;
FBackBitmap: TBitmap;
FBackgroundStyle: TBackgroundStyle;
OldWidth, OldHeight: Integer;
FSelStartNo, FSelEndNo, FSelStartOffs, FSelEndOffs: Integer;
procedure InvalidateJumpRect(no: Integer);
procedure WMSize(var Message: TWMSize); message WM_SIZE;
procedure WMEraseBkgnd(var Message: TWMEraseBkgnd); message WM_ERASEBKGND;
function FindItemAtPos(X,Y: Integer): Integer;
procedure FindItemForSel(X,Y: Integer; var No, Offs: Integer);
function GetLineCount: Integer;
procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
procedure GetSelBounds(var StartNo, EndNo, StartOffs, EndOffs: Integer);
procedure StoreSelBounds(var StartNo, EndNo, StartOffs, EndOffs: Integer);
procedure RestoreSelBounds(StartNo, EndNo, StartOffs, EndOffs: Integer);
protected
{ Protected declarations }
drawlines:TStringList;
checkpoints: TStringList;
jumps: TStringList;
FStyle: TRVStyle;
nJmps: Integer;
skipformatting: Boolean;
TextWidth, TextHeight: Integer;
LastJumpMovedAbove, LastLineFormatted: Integer;
LastJumpDowned, XClicked, YClicked, XMouse, YMouse: Integer;
imgSavePrefix: String;
imgSaveNo: Integer;
SaveOptions: TRVSaveOptions;
ShareContents: Boolean;
procedure Notification(AComponent: TComponent; Operation: TOperation);override;
procedure Click; override;
procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);override;
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);override;
procedure DblClick; override;
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
procedure FormatLine(no: Integer; var x,baseline,prevdesc,prevabove:Integer; Canvas: TCanvas;
var sad: TScreenAndDevice);
procedure AdjustJumpsCoords;
procedure AdjustChildrenCoords;
procedure ClearTemporal;
function GetFirstVisible(TopLine: Integer): Integer;
function GetFirstLineVisible: Integer;
function GetLastLineVisible: Integer;
function GetDrawLineNo(BoundLine: Integer; Option: Integer): Integer;
procedure Format_(OnlyResized:Boolean; depth: Integer; Canvas: TCanvas; OnlyTail: Boolean);
procedure SetBackBitmap(Value: TBitmap);
procedure DrawBack(DC: HDC; Rect: TRect; Width,Height:Integer);
procedure SetBackgroundStyle(Value: TBackgroundStyle);
procedure SetVSmallStep(Value: Integer);
function GetNextFileName(Path: String): String; virtual;
procedure ShareLinesFrom(Source: TRichView);
function FindClickedWord(var clickedword: String; var StyleNo: Integer): Boolean;
procedure OnScrollTimer(Sender: TObject);
procedure Loaded; override;
public
{ Public declarations }
lines:TStringList;
DisplayOptions: TRVDisplayOptions;
FClientTextWidth: Boolean;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Paint; override;
procedure AddFromNewLine(s: String;StyleNo:Integer);
procedure Add(s: String;StyleNo:Integer);
procedure AddCenterLine(s: String;StyleNo:Integer);
procedure AddText(s: String;StyleNo:Integer);
procedure AddTextFromNewLine(s: String;StyleNo:Integer);
procedure AddBreak;
function AddCheckPoint: Integer; { returns cp # }
function AddNamedCheckPoint(CpName: String): Integer; { returns cp # }
function GetCheckPointY(no: Integer): Integer;
function GetJumpPointY(no: Integer): Integer;
procedure AddPicture(gr: TGraphic);
procedure AddHotSpot(imgNo: Integer; lst: TImageList; fromnewline: Boolean);
procedure AddBullet (imgNo: Integer; lst: TImageList; fromnewline: Boolean);
procedure AddControl(ctrl: TControl; center: Boolean);
function GetMaxPictureWidth: Integer;
procedure Clear;
procedure Format;
procedure FormatTail;
procedure AppendFrom(Source: TRichView);
function GetLastCP: Integer;
property VSmallStep: Integer read SmallStep write SetVSmallStep;
function SaveHTML(FileName, Title, ImagesPrefix: String; Options: TRVSaveOptions):Boolean;
function SaveText(FileName: String; LineWidth: Integer):Boolean;
procedure DeleteSection(CpName: String);
procedure DeleteLines(FirstLine, Count: Integer);
//use this only inside OnSaveComponentToFile event handler:
function SavePicture(DocumentSaveFormat: TRVSaveFormat; Path: String; gr: TGraphic): String; virtual;
procedure CopyText;
function GetSelText: String;
function SelectionExists: Boolean;
procedure Deselect;
procedure SelectAll;
property LineCount: Integer read GetLineCount;
property FirstLineVisible: Integer read GetFirstLineVisible;
property LastLineVisible: Integer read GetLastLineVisible;
published
{ Published declarations }
property PopupMenu;
property OnClick;
property OnKeyDown;
property OnKeyUp;
property OnKeyPress;
property FirstJumpNo: Integer read FFirstJumpNo write FFirstJumpNo;
property OnJump: TJumpEvent read FOnJump write FOnJump;
property OnRVMouseMove: TRVMouseMoveEvent read FOnRVMouseMove write FOnRVMouseMove;
property OnSaveComponentToFile: TRVSaveComponentToFileEvent read FOnSaveComponentToFile write FOnSaveComponentToFile;
property OnURLNeeded: TRVURLNeededEvent read FOnURLNeeded write FOnURLNeeded;
property OnRVDblClick: TRVDblClickEvent read FOnRVDblClick write FOnRVDblClick;
property OnRVRightClick: TRVRightClickEvent read FOnRVRightClick write FOnRVRightClick;
property OnSelect: TNotifyEvent read FOnSelect write FOnSelect;
property OnResized: TNotifyEvent read FOnResized write FOnResized;
property Style: TRVStyle read FStyle write FStyle;
property MaxTextWidth:Integer read FMaxTextWidth write FMaxTextWidth;
property MinTextWidth:Integer read FMinTextWidth write FMinTextWidth;
property LeftMargin: Integer read FLeftMargin write FLeftMargin;
property RightMargin: Integer read FRightMargin write FRightMargin;
property BackgroundBitmap: TBitmap read FBackBitmap write SetBackBitmap;
property BackgroundStyle: TBackgroundStyle read FBackgroundStyle write SetBackgroundStyle;
property Delimiters: String read FDelimiters write FDelimiters;
property AllowSelection: Boolean read FAllowSelection write FAllowSelection;
property SingleClick: Boolean read FSingleClick write FSingleClick;
end;
TRichEdit = class(TRichView)
procedure FCursorTimerTimer(Sender: TObject);
private
FCursorTimer : TTimer;
FCursorVisible : Boolean;
protected
procedure Paint; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property Cursor default crIBeam;
end;
procedure InfoAboutSaD(var sad:TScreenAndDevice; Canvas: TCanvas);
implementation
{$IFDEF FPC}
uses Printers;
{-------------------------------------}
procedure InfoAboutSaD(var sad:TScreenAndDevice; Canvas: TCanvas);
var screenDC: HDC;
begin
if Canvas is TPrinterCanvas then begin
sad.ppixDevice := Printer.XDPI;
sad.ppiyDevice := Printer.YDPI;
end else begin
sad.ppixDevice := GetDeviceCaps(Canvas.Handle, LOGPIXELSX);
sad.ppiyDevice := GetDeviceCaps(Canvas.Handle, LOGPIXELSY);
end;
screenDc := CreateCompatibleDC(0);
sad.ppixScreen := GetDeviceCaps(screenDC, LOGPIXELSY);
sad.ppiyScreen := GetDeviceCaps(screenDC, LOGPIXELSY);
DeleteDC(screenDC);
end;
procedure TRichEdit.FCursorTimerTimer(Sender: TObject);
begin
FCursorVisible:=not FCursorVisible;
Repaint;
end;
procedure TRichEdit.Paint;
var
aObj: TDrawLineInfo;
aTopObj: TDrawLineInfo;
begin
inherited Paint;
if FCursorVisible then
begin
if FSelEndNo<0 then exit;
aObj := TDrawLineInfo(DrawLines.Objects[FSelEndNo]);
aTopObj := TDrawLineInfo(DrawLines.Objects[GetFirstLineVisible]);
Canvas.Rectangle(aObj.Left,aObj.Top-aTopObj.Top,aObj.Left+3,(aObj.Top-aTopObj.Top)+aObj.Height);
end;
end;
constructor TRichEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FCursorTimer:=TTimer.Create(Self);
FCursorTimer.OnTimer:=FCursorTimerTimer;
end;
destructor TRichEdit.Destroy;
begin
FreeAndNil(FCursorTimer);
inherited Destroy;
end;
{$ELSE}
{-------------------------------------}
procedure InfoAboutSaD(var sad:TScreenAndDevice; Canvas: TCanvas);
var screenDC: HDC;
begin
sad.ppixDevice := GetDeviceCaps(Canvas.Handle, LOGPIXELSX);
sad.ppiyDevice := GetDeviceCaps(Canvas.Handle, LOGPIXELSY);
screenDc := CreateCompatibleDC(0);
sad.ppixScreen := GetDeviceCaps(screenDC, LOGPIXELSX);
sad.ppiyScreen := GetDeviceCaps(screenDC, LOGPIXELSY);
DeleteDC(screenDC);
end;
{$ENDIF}
{==================================================================}
constructor TRichView.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FClientTextWidth := False;
FLeftMargin := 5;
FRightMargin := 5;
FMaxTextWidth := 0;
FMinTextWidth := 0;
TextWidth := -1;
TextHeight := 0;
LastJumpMovedAbove := -1;
FStyle := nil;
LastJumpDowned := -1;
drawlines := TStringList.Create;
lines := TStringList.Create;
checkpoints := TStringList.Create;
jumps := TStringList.Create;
FBackBitmap := TBitmap.Create;
FBackGroundStyle := bsNoBitmap;
nJmps :=0;
FirstJumpNo :=0;
skipformatting := False;
OldWidth := 0;
OldHeight := 0;
Width := 100;
Height := 40;
DisplayOptions := [rvdoImages, rvdoComponents, rvdoBullets];
ShareContents := False;
FDelimiters := ' .;,:(){}"';
DrawHover := False;
FSelStartNo := -1;
FSelEndNo := -1;
FSelStartOffs := 0;
FSelEndOffs := 0;
Selection := False;
FAllowSelection:= True;
LastLineFormatted := -1;
ScrollTimer := nil;
//Format_(False,0, Canvas, False);
end;
{-------------------------------------}
destructor TRichView.Destroy;
begin
FBackBitmap.Free;
Clear;
drawlines.Free;
checkpoints.Free;
jumps.Free;
if not ShareContents then lines.Free;
inherited Destroy;
end;
{-------------------------------------}
procedure TRichView.WMSize(var Message: TWMSize);
begin
Format_(True, 0, Canvas, False);
if Assigned(FOnResized) then FOnResized(Self);
end;
{-------------------------------------}
procedure TRichView.Format;
begin
Format_(False, 0, Canvas, False);
end;
{-------------------------------------}
procedure TRichView.FormatTail;
begin
Format_(False, 0, Canvas, True);
end;
{-------------------------------------}
procedure TRichView.ClearTemporal;
var i: Integer;
begin
if ScrollTimer<>nil then begin
ScrollTimer.Free;
ScrollTimer := nil;
end;
drawlines.BeginUpdate;
for i:=0 to drawlines.Count-1 do begin
TDrawLineInfo(drawlines.objects[i]).Free;
drawlines.objects[i] := nil;
end;
drawlines.Clear;
drawlines.EndUpdate;
checkpoints.BeginUpdate;
for i:=0 to checkpoints.Count-1 do begin
TCPInfo(checkpoints.objects[i]).Free;
checkpoints.objects[i] := nil;
end;
checkpoints.Clear;
checkpoints.EndUpdate;
jumps.BeginUpdate;
for i:=0 to jumps.Count-1 do begin
TJumpInfo(jumps.objects[i]).Free;
jumps.objects[i] := nil;
end;
jumps.Clear;
jumps.EndUpdate;
nJmps :=0;
end;
{-------------------------------------}
procedure TRichView.Deselect;
begin
Selection := False;
FSelStartNo := -1;
FSelEndNo := -1;
FSelStartOffs := 0;
FSelEndOffs := 0;
if Assigned(FOnSelect) then OnSelect(Self);
end;
{-------------------------------------}
procedure TRichView.SelectAll;
begin
FSelStartNo := 0;
FSelEndNo := DrawLines.Count-1;
FSelStartOffs := 0;
FSelEndOffs := 0;
if TLineInfo(Lines.Objects[TDrawLineInfo(DrawLines.Objects[FSelEndNo]).LineNo]).StyleNo>=0 then
FSelEndOffs := Length(DrawLines[FSelEndNo])+1;
if Assigned(FOnSelect) then OnSelect(Self);
end;
{-------------------------------------}
procedure TRichView.Clear;
var i: Integer;
begin
Deselect;
if not ShareContents then begin
lines.BeginUpdate;
for i:=0 to lines.Count-1 do begin
if TLineInfo(lines.objects[i]).StyleNo = -3 then { image}
begin
TLineInfo(lines.objects[i]).gr.Free;
TLineInfo(lines.objects[i]).gr := nil;
end;
if TLineInfo(lines.objects[i]).StyleNo = -5 then {control}
begin
RemoveControl(TControl(TLineInfo(lines.objects[i]).gr));
TLineInfo(lines.objects[i]).gr.Free;
TLineInfo(lines.objects[i]).gr := nil;
end;
TLineInfo(lines.objects[i]).Free;
lines.objects[i] := nil;
end;
lines.Clear;
lines.EndUpdate;
end;
ClearTemporal;
end;
{-------------------------------------}
procedure TRichView.AddFromNewLine(s: String; StyleNo:Integer);
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := StyleNo;
info.SameAsPrev := False;
info.Center := False;
lines.AddObject(s, info);
end;
{-------------------------------------}
procedure TRichView.Add(s: String; StyleNo:Integer);
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := StyleNo;
info.SameAsPrev := (lines.Count<>0);
info.Center := False;
lines.AddObject(s, info);
end;
{-------------------------------------}
procedure TRichView.AddText(s: String;StyleNo:Integer);
var p: Integer;
begin
{$IFDEF FPC}
s:=AdjustLineBreaks(s, tlbsCRLF);
{$ELSE}
s:=AdjustLineBreaks(s);
{$ENDIF}
p := Pos(chr(13)+chr(10),s);
if p=0 then begin
if s<>'' then Add(s,StyleNo);
exit;
end;
Add(Copy(s,1,p-1), StyleNo);
Delete(s,1, p+1);
while s<>'' do begin
p := Pos(chr(13)+chr(10),s);
if p=0 then begin
AddFromNewLine(s,StyleNo);
break;
end;
AddFromNewLine(Copy(s,1,p-1), StyleNo);
Delete(s,1, p+1);
end;
end;
{-------------------------------------}
procedure TRichView.AddTextFromNewLine(s: String;StyleNo:Integer);
var p: Integer;
begin
{$IFDEF FPC}
s:=AdjustLineBreaks(s, tlbsCRLF);
{$ELSE}
s:=AdjustLineBreaks(s);
{$ENDIF}
p := Pos(chr(13)+chr(10),s);
if p=0 then begin
AddFromNewLine(s,StyleNo);
exit;
end;
while s<>'' do begin
p := Pos(chr(13)+chr(10),s);
if p=0 then begin
AddFromNewLine(s,StyleNo);
break;
end;
AddFromNewLine(Copy(s,1,p-1), StyleNo);
Delete(s,1, p+1);
end;
end;
{-------------------------------------}
procedure TRichView.AddCenterLine(s: String;StyleNo:Integer);
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := StyleNo;
info.SameAsPrev := False;
info.Center := True;
lines.AddObject(s, info);
end;
{-------------------------------------}
procedure TRichView.AddBreak;
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -1;
lines.AddObject('', info);
end;
{-------------------------------------}
function TRichView.AddNamedCheckPoint(CpName: String): Integer;
var info: TLineInfo;
cpinfo: TCPInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -2;
lines.AddObject(CpName, info);
cpInfo := TCPInfo.Create;
cpInfo.Y := 0;
checkpoints.AddObject(CpName,cpinfo);
AddNamedCheckPoint := checkpoints.Count-1;
end;
{-------------------------------------}
function TRichView.AddCheckPoint: Integer;
begin
AddCheckPoint := AddNamedCheckPoint('');
end;
{-------------------------------------}
function TRichView.GetCheckPointY(no: Integer): Integer;
begin
GetCheckPointY := TCPInfo(checkpoints.Objects[no]).Y;
end;
{-------------------------------------}
function TRichView.GetJumpPointY(no: Integer): Integer;
var i: Integer;
begin
GetJumpPointY := 0;
for i:=0 to Jumps.Count-1 do
if TJumpInfo(jumps.objects[i]).id = no-FirstJumpNo then begin
GetJumpPointY := TJumpInfo(jumps.objects[i]).t;
exit;
end;
end;
{-------------------------------------}
procedure TRichView.AddPicture(gr: TGraphic); { gr not copied, do not free it!}
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -3;
info.gr := gr;
info.SameAsPrev := False;
info.Center := True;
lines.AddObject('', info);
end;
{-------------------------------------}
procedure TRichView.AddHotSpot(imgNo: Integer; lst: TImageList; fromnewline: Boolean);
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -4;
info.gr := lst;
info.imgNo := imgNo;
info.SameAsPrev := not FromNewLine;
lines.AddObject('', info);
end;
{-------------------------------------}
procedure TRichView.AddBullet(imgNo: Integer; lst: TImageList; fromnewline: Boolean);
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -6;
info.gr := lst;
info.imgNo := imgNo;
info.SameAsPrev := not FromNewLine;
lines.AddObject('', info);
end;
{-------------------------------------}
procedure TRichView.AddControl(ctrl: TControl; center: Boolean); { do not free ctrl! }
var info: TLineInfo;
begin
info := TLineInfo.Create;
info.StyleNo := -5;
info.gr := ctrl;
info.SameAsPrev := False;
info.Center := center;
lines.AddObject('', info);
InsertControl(ctrl);
end;
{-------------------------------------}
function TRichView.GetMaxPictureWidth: Integer;
var i,m: Integer;
begin
m := 0;
for i:=0 to lines.Count-1 do begin
if TLineInfo(lines.objects[i]).StyleNo = -3 then
if m<TGraphic(TLineInfo(lines.objects[i]).gr).Width then
m := TGraphic(TLineInfo(lines.objects[i]).gr).Width;
if TLineInfo(lines.objects[i]).StyleNo = -5 then
if m<TControl(TLineInfo(lines.objects[i]).gr).Width then
m := TControl(TLineInfo(lines.objects[i]).gr).Width;
end;
GetMaxPictureWidth := m;
end;
{-------------------------------------}
function max(a,b: Integer): Integer;
begin
if a>b then
max := a
else
max := b;
end;
{-------------------------------------}
procedure TRichView.Format_(OnlyResized:Boolean; depth: Integer; Canvas: TCanvas;
OnlyTail: Boolean);
var i: Integer;
x,b,d,a: Integer;
mx : Integer;
oldy, oldtextwidth, cw, ch: Integer;
sad: TScreenAndDevice;
StyleNo: Integer;
StartLine: Integer;
StartNo, EndNo, StartOffs, EndOffs: Integer;
begin
if smallstep = 0 then exit;
if (csDesigning in ComponentState) or
not Assigned(FStyle) or
skipformatting or
(depth>1)
then exit;
skipformatting := True;
if depth=0 then StoreSelBounds(StartNo, EndNo, StartOffs, EndOffs);
OldY := VPos*SmallStep;
oldtextwidth := TextWidth;
mx := max(ClientWidth-(FLeftMargin+FRightMargin), GetMaxPictureWidth);
if mx<FMinTextWidth then mx := FMinTextWidth;
if FClientTextWidth then begin { widths of pictures and maxtextwidth are ignored }
TextWidth := ClientWidth-(FLeftMargin+FRightMargin);
if TextWidth<FMinTextWidth then TextWidth := FMinTextWidth;
end
else begin
if (mx > FMaxTextWidth) and (FMaxTextWidth>0) then
TextWidth := FMaxTextWidth
else
TextWidth := mx;
end;
if not (OnlyResized and (TextWidth=OldTextWidth)) then begin
if OnlyTail then begin
StartLine := LastLineFormatted+1;
b:= TextHeight;
end
else begin
StartLine := 0;
b := 0;
ClearTemporal;
end;
x:=0;
d:=0;
InfoAboutSaD(sad, Canvas);
sad.LeftMargin := MulDiv(FLeftMargin, sad.ppixDevice, sad.ppixScreen);
for i:=StartLine to lines.Count-1 do begin
StyleNo := TLineInfo(Lines.Objects[i]).StyleNo;
if not (((StyleNo = rvsPicture) and (not (rvdoImages in DisplayOptions))) or
((StyleNo = rvsComponent)and(not (rvdoComponents in DisplayOptions))) or
(((StyleNo = rvsBullet) or (StyleNo = rvsHotspot))and(not (rvdoBullets in DisplayOptions)))) then
FormatLine(i,x,b, d,a, Canvas, sad);
end;
TextHeight := b+d+1;
if TextHeight div SmallStep > 30000 then
SmallStep := TextHeight div 30000;
AdjustJumpsCoords;
end
else
AdjustChildrenCoords;
HPos := 0;
VPos := 0;
cw := ClientWidth;
ch := ClientHeight;
UpdateScrollBars(mx+FLeftMargin+FRightMargin, TextHeight div SmallStep);
if (cw<>ClientWidth) or (ch<>ClientHeight) then begin
skipformatting := False;
ScrollTo(OldY);
Format_(OnlyResized, depth+1, Canvas, False);
end;
if OnlyResized then ScrollTo(OldY);
if OnlyTail then ScrollTo(TextHeight);
if depth=0 then RestoreSelBounds(StartNo, EndNo, StartOffs, EndOffs);
skipformatting := False;
LastLineFormatted := Lines.Count-1;
end;
{-------------------------------------}
procedure TRichView.AdjustChildrenCoords;
var i: Integer;
dli: TDrawLineInfo;
li : TLineInfo;
begin
for i:=0 to drawlines.Count-1 do begin
dli := TDrawLineInfo(drawlines.Objects[i]);
li := TLineInfo(lines.Objects[dli.LineNo]);
if li.StyleNo = -5 then {control}
begin
TControl(li.gr).Left := dli.Left;
TControl(li.gr).Tag := dli.Top;
Tag2Y(TControl(li.gr));
end;
end;
end;
{-------------------------------------}
procedure TRichView.FormatLine(no: Integer; var x,baseline,prevdesc,prevabove:Integer; Canvas: TCanvas;
var sad: TScreenAndDevice);
var sourceStrPtr, strForAdd, strSpacePos: PChar;
sourceStrPtrLen: Integer;
sz: TSIZE;
max,j, y, ctrlw, ctrlh : Integer;
{$IFNDEF RICHVIEWDEF4}
arr: array[0..1000] of integer;
{$ENDIF}
str: array[0..1000] of char;
info: TDrawLineInfo;
metr: TTextMetric;
StyleNo: Integer;
newline, center:Boolean;
cpinfo: TCPInfo;
jmpinfo: TJumpInfo;
width, y5, Offs : Integer;
begin
width := TextWidth;
case TLineInfo(lines.Objects[no]).StyleNo of
-5: { Control }
begin
ctrlw := TControl(TLineInfo(lines.Objects[no]).gr).Width;
ctrlh := TControl(TLineInfo(lines.Objects[no]).gr).Height;
ctrlw := MulDiv(ctrlw, sad.ppixDevice, sad.ppixScreen);
ctrlh := MulDiv(ctrlh, sad.ppiyDevice, sad.ppiyScreen);
info := TDrawLineInfo.Create;
info.LineNo := no;
info.Top := baseline + prevdesc + 1;
info.Width := ctrlw;
info.Height := ctrlh+1;
if TLineInfo(lines.Objects[no]).Center then begin
info.Left := (width-ctrlw) div 2;
if info.Left<0 then info.Left := 0;
inc(info.Left,sad.LeftMargin);
end
else
info.Left := sad.LeftMargin;
drawlines.AddObject('',info);
TControl(TLineInfo(lines.Objects[no]).gr).Left := info.Left;
TControl(TLineInfo(lines.Objects[no]).gr).Tag := info.Top;
Tag2Y(TControl(TLineInfo(lines.Objects[no]).gr));
inc (baseline,prevdesc+ctrlh+1);
prevdesc :=1;
prevabove := ctrlh+1;
end;
-4, -6: { hotSpot or Bullet }
begin
ctrlw := TImageList(TLineInfo(lines.Objects[no]).gr).Width;
ctrlh := TImageList(TLineInfo(lines.Objects[no]).gr).Height;
ctrlw := MulDiv(ctrlw, sad.ppixDevice, sad.ppixScreen);
ctrlh := MulDiv(ctrlh, sad.ppiyDevice, sad.ppiyScreen);
info := TDrawLineInfo.Create;
info.Width := ctrlw+1;
info.Height := ctrlh+1;
if not TLineInfo(lines.Objects[no]).SameAsPrev or (x+ctrlw+2 > width) then begin
x:=0;
y:=baseline + prevdesc;
inc (baseline,prevdesc+ctrlh+1);
prevdesc :=1;
prevabove := ctrlh+1;
end
else begin
if prevabove < ctrlh+1 then begin
j := drawlines.Count-1;
if j>=0 then
repeat
inc(TDrawLineInfo(drawlines.Objects[j]).Top,ctrlh+1-prevabove);
dec(j);
until TDrawLineInfo(drawlines.Objects[j+1]).FromNewLine;
inc(baseline,ctrlh+1-prevabove);
prevabove := ctrlh+1;
end;
y := baseline - (ctrlh+1);
end;
if TLineInfo(lines.Objects[no]).StyleNo = -4 then begin{HotSpot}
jmpinfo := TJumpInfo.Create;
jmpinfo.l := x+1+sad.LeftMargin;;
jmpinfo.t := y+1;
jmpinfo.w := ctrlw;
jmpinfo.h := ctrlh;
jmpinfo.id := nJmps;
jmpinfo.idx := drawlines.Count;
jumps.AddObject('',jmpinfo);
inc(nJmps);
end;
info.Left := x+1+sad.LeftMargin;;
inc(x, ctrlw+2);
info.Top := y+1;
info.LineNo := no;
info.FromNewLine := not TLineInfo(lines.Objects[no]).SameAsPrev;
drawlines.AddObject('',info);
end;
-3: { graphics}
begin
ctrlw := TGraphic(TLineInfo(lines.Objects[no]).gr).Width;
ctrlh := TGraphic(TLineInfo(lines.Objects[no]).gr).Height;
ctrlw := MulDiv(ctrlw, sad.ppixDevice, sad.ppixScreen);
ctrlh := MulDiv(ctrlh, sad.ppiyDevice, sad.ppiyScreen);
info := TDrawLineInfo.Create;
info.Width := ctrlw;
info.Height := ctrlh+1;
info.Left := (width-ctrlw) div 2;
if info.Left<0 then info.Left := 0;
inc(info.Left,sad.LeftMargin);
info.Top := baseline + prevdesc + 1;
info.LineNo := no;
drawlines.AddObject('',info);
inc (baseline,prevdesc+ctrlh+1);
prevdesc :=1;
prevabove := ctrlh+1;
end;
-2: { check point}
begin
cpinfo := TCPInfo.Create;
cpinfo.Y := baseline + prevDesc;
cpinfo.LineNo := no;
checkpoints.AddObject(lines[no], cpinfo);
end;
-1: { break line}
begin
y5 := MulDiv(5, sad.ppiyDevice, sad.ppiyScreen);
info := TDrawLineInfo.Create;
info.Left := sad.LeftMargin;
info.Top := baseline + prevdesc;
info.LineNo := no;
info.Width := Width;
info.Height := y5+y5+1;
drawlines.AddObject(Lines[no],info);
inc (baseline,prevdesc+y5+y5+1);
prevdesc := y5;
prevabove := y5;
end;
else begin
sourceStrPtr := PChar(lines.Strings[no]);
strForAdd := str;
sourceStrPtrLen := StrLen(sourceStrPtr);
StyleNo := TLineInfo(lines.Objects[no]).StyleNo;
with FStyle.TextStyles[StyleNo] do begin
Canvas.Font.Style := Style;
Canvas.Font.Size := Size;
Canvas.Font.Name := FontName;
{$IFDEF RICHVIEWDEF3}
Canvas.Font.CharSet := CharSet;
{$ENDIF}
end;
GetTextMetrics(Canvas.Handle,metr);
newline := not TLineInfo(lines.Objects[no]).SameAsPrev;
Center := TLineInfo(lines.Objects[no]).Center;
while sourceStrPtrLen>0 do begin
if newline then x:=0;
{$IFDEF FPC}
MyGetTextExtentExPoint(Canvas.Handle, sourceStrPtr, sourceStrPtrLen, Width-x,
{$ELSE}
GetTextExtentExPoint(Canvas.Handle, sourceStrPtr, sourceStrPtrLen, Width-x,
{$ENDIF}
{$IFDEF RICHVIEWDEF4}
@max, nil,
{$ELSE}
max, arr[0],
{$ENDIF}
sz);
if max=0 then max := 1;
StrLCopy(strForAdd, sourceStrPtr,max);
if max<sourceStrPtrLen then
{if sourceStrPtr[max]<>' ' then } begin
StrLCopy(strForAdd, sourceStrPtr,max);
strSpacePos := StrRScan(strForAdd,' ');
if strSpacePos<>nil then begin
max := strSpacePos-strForAdd;
StrLCopy(strForAdd, sourceStrPtr,max);
inc(max);
end
else
if not newline then begin
x:=0;
newline := true;
continue;
end;
end;
Offs := sourceStrPtr - PChar(Lines.Strings[no])+1;
sourceStrPtr := @(sourceStrPtr[max]);
info := TDrawLineInfo.Create;
info.LineNo := no;
info.Offs := Offs;
{$IFDEF FPC}
MyGetTextExtentExPoint(Canvas.Handle, strForAdd, StrLen(strForAdd), Width-x,
{$ELSE}
GetTextExtentExPoint(Canvas.Handle, strForAdd, StrLen(strForAdd), Width-x,
{$ENDIF}
{$IFDEF RICHVIEWDEF4}
@max, nil,
{$ELSE}
max,arr[0],
{$ENDIF}
sz);
if not newline then begin {continue line}
if prevabove < metr.tmExternalLeading+metr.tmAscent then begin
j := drawlines.Count-1;
if j>=0 then
repeat
inc(TDrawLineInfo(drawlines.Objects[j]).Top,metr.tmExternalLeading+metr.tmAscent-prevabove);
dec(j);
until TDrawLineInfo(drawlines.Objects[j+1]).FromNewLine;
inc(baseline,metr.tmExternalLeading+metr.tmAscent-prevabove);
prevabove := metr.tmExternalLeading+metr.tmAscent;
end;
y := baseline - metr.tmAscent;
info.FromNewLine := False;
end
else begin { new line }
info.FromNewLine := True;
if Center then
x := (Width - sz.cx) div 2
else
x :=0;
y := baseline+prevDesc+metr.tmExternalLeading;
inc(baseline, prevDesc+metr.tmExternalLeading+metr.tmAscent);
prevabove := metr.tmExternalLeading+metr.tmAscent;
end;
info.Left :=x+sad.LeftMargin;;
info.Top := y;
info.Width := sz.cx;
info.Height := sz.cy;
drawlines.AddObject(strForAdd,info);
if (StyleNo=rvsJump1) or (StyleNo=rvsJump2) then begin
jmpinfo := TJumpInfo.Create;
jmpinfo.l := x+sad.LeftMargin;
jmpinfo.t := y;
jmpinfo.w := sz.cx;
jmpinfo.h := sz.cy;
jmpinfo.id := nJmps;
jmpinfo.idx := drawlines.Count-1;
TLineInfo(lines.Objects[no]).imgNo := nJmps;
jumps.AddObject('',jmpinfo);
end;