mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-12-04 09:26:52 +02:00
fd1e936198
- Removed CEFSentinel from some demos because it's no longer necessary. - Updated copyright year.
829 lines
30 KiB
ObjectPascal
829 lines
30 KiB
ObjectPascal
// ************************************************************************
|
|
// ***************************** CEF4Delphi *******************************
|
|
// ************************************************************************
|
|
//
|
|
// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
|
|
// browser in Delphi applications.
|
|
//
|
|
// The original license of DCEF3 still applies to CEF4Delphi.
|
|
//
|
|
// For more information about CEF4Delphi visit :
|
|
// https://www.briskbard.com/index.php?lang=en&pageid=cef
|
|
//
|
|
// Copyright © 2020 Salvador Diaz Fau. All rights reserved.
|
|
//
|
|
// ************************************************************************
|
|
// ************ vvvv Original license and comments below vvvv *************
|
|
// ************************************************************************
|
|
(*
|
|
* Delphi Chromium Embedded 3
|
|
*
|
|
* Usage allowed under the restrictions of the Lesser GNU General Public License
|
|
* or alternatively the restrictions of the Mozilla Public License 1.1
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
|
|
* the specific language governing rights and limitations under the License.
|
|
*
|
|
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
|
|
* Web site : http://www.progdigy.com
|
|
* Repository : http://code.google.com/p/delphichromiumembedded/
|
|
* Group : http://groups.google.com/group/delphichromiumembedded
|
|
*
|
|
* Embarcadero Technologies, Inc is not permitted to use or redistribute
|
|
* this source code without explicit permission.
|
|
*
|
|
*)
|
|
|
|
unit uCEFDragAndDropMgr;
|
|
|
|
{$IFDEF FPC}
|
|
{$MODE OBJFPC}{$H+}
|
|
{$ENDIF}
|
|
|
|
{$I cef.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
{$IFDEF DELPHI16_UP}
|
|
{$IFDEF MSWINDOWS}WinApi.Windows, WinApi.ActiveX, WinApi.ShlObj, WinApi.ShellApi,{$ENDIF}
|
|
System.Classes, System.SysUtils, System.Math, System.StrUtils, System.AnsiStrings,
|
|
{$ELSE}
|
|
{$IFDEF MSWINDOWS}Windows, ActiveX, ShlObj, Shellapi,{$ENDIF}
|
|
Classes, SysUtils, Math, StrUtils, {$IFDEF DELPHI12_UP}AnsiStrings,{$ENDIF}
|
|
{$ENDIF}
|
|
uCEFDragData, uCEFInterfaces, uCEFTypes, uCEFOLEDragAndDrop;
|
|
|
|
type
|
|
TDragEnterEvent = procedure(Sender: TObject; const aDragData : ICefDragData; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint) of object;
|
|
TDragOverEvent = procedure(Sender: TObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint) of object;
|
|
TDropEvent = procedure(Sender: TObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint) of object;
|
|
|
|
TCEFDragAndDropMgr = class(TOLEDragAndDropMgr)
|
|
protected
|
|
FCurrentDragData : ICefDragData;
|
|
FOLEEffect : integer;
|
|
FMozURLFormat : cardinal;
|
|
FHTMLFormat : cardinal;
|
|
FFileDescFormat : cardinal;
|
|
FFileContentsFormat : cardinal;
|
|
|
|
FOnDragEnter : TDragEnterEvent;
|
|
FOnDragOver : TDragOverEvent;
|
|
FOnDragLeave : TNotifyEvent;
|
|
FOnDrop : TDropEvent;
|
|
|
|
function DragDataToDataObject_Unicode(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
function DragDataToDataObject_Text(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
function DragDataToDataObject_HTML(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
function DragDataToDataObject_URL(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
function DragDataToDataObject_FileDesc(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
function DragDataToDataObject_FileContents(const aDragData : ICefDragData; var aFormat : TFormatEtc; var aMedium : TStgMedium) : boolean;
|
|
|
|
procedure DataObjectToDragData(const aDataObject : IDataObject; var aDragData : ICefDragData);
|
|
function DataObjectToDragData_Unicode(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
function DataObjectToDragData_Text(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
function DataObjectToDragData_URL(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
function DataObjectToDragData_HTML(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
function DataObjectToDragData_FileDrop(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
|
|
function HtmlToCFHtml(var aHTML, aBaseURL : ustring) : AnsiString;
|
|
procedure CFHtmlToHtml(const cf_html : AnsiString; var html, base_url : string);
|
|
function ZeroFiller(aNumber, aLength : integer) : AnsiString;
|
|
function FindStringField(const aString, aFieldName : AnsiString; var aPos : integer) : string;
|
|
|
|
public
|
|
constructor Create;
|
|
destructor Destroy; override;
|
|
function StartDragging : TCefDragOperation;
|
|
function CloneDragData(const aDragData : ICefDragData; aAllowedOps : TCefDragOperations) : boolean;
|
|
|
|
function DragEnter(const DataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HRESULT; override;
|
|
function DragOver(grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HRESULT; override;
|
|
function DragLeave: HRESULT; override;
|
|
function Drop(const dataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HRESULT; override;
|
|
|
|
property OnDragEnter : TDragEnterEvent read FOnDragEnter write FOnDragEnter;
|
|
property OnDragOver : TDragOverEvent read FOnDragOver write FOnDragOver;
|
|
property OnDragLeave : TNotifyEvent read FOnDragLeave write FOnDragLeave;
|
|
property OnDrop : TDropEvent read FOnDrop write FOnDrop;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
uCEFMiscFunctions, uCEFWriteHandler, uCEFStreamWriter, uCEFConstants;
|
|
|
|
{$IFDEF FPC}
|
|
const
|
|
//CFSTR_FILEDESCRIPTORA = 'FileGroupDescriptor'; // CF_FILEGROUPDESCRIPTORA
|
|
CFSTR_FILEDESCRIPTORW = 'FileGroupDescriptorW'; // CF_FILEGROUPDESCRIPTORW
|
|
CFSTR_FILEDESCRIPTOR = CFSTR_FILEDESCRIPTORW;
|
|
CFSTR_FILECONTENTS = 'FileContents'; // CF_FILECONTENTS
|
|
{$ENDIF}
|
|
|
|
// *****************************************************
|
|
// **************** TCEFDragAndDropMgr *****************
|
|
// *****************************************************
|
|
|
|
constructor TCEFDragAndDropMgr.Create;
|
|
begin
|
|
inherited Create;
|
|
|
|
FOnDragEnter := nil;
|
|
FOnDragOver := nil;
|
|
FOnDragLeave := nil;
|
|
FOnDrop := nil;
|
|
FCurrentDragData := nil;
|
|
|
|
FMozURLFormat := RegisterClipboardFormat('text/x-moz-url');
|
|
FHTMLFormat := RegisterClipboardFormat('HTML Format');
|
|
FFileDescFormat := RegisterClipboardFormat(CFSTR_FILEDESCRIPTOR);
|
|
FFileContentsFormat := RegisterClipboardFormat(CFSTR_FILECONTENTS);
|
|
end;
|
|
|
|
destructor TCEFDragAndDropMgr.Destroy;
|
|
begin
|
|
FCurrentDragData := nil;
|
|
|
|
inherited Destroy;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_Unicode(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempText : ustring;
|
|
begin
|
|
Result := False;
|
|
TempText := aDragData.GetFragmentText;
|
|
|
|
if (length(TempText) > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := CF_UNICODETEXT;
|
|
|
|
TempText := TempText + #0;
|
|
Result := GetStorageForString(aMedium, TempText);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_Text(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempText : AnsiString;
|
|
begin
|
|
Result := False;
|
|
TempText := UTF8Encode(aDragData.GetFragmentText);
|
|
|
|
if (length(TempText) > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := CF_TEXT;
|
|
|
|
TempText := TempText + #0;
|
|
Result := GetStorageForString(aMedium, TempText);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_HTML(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempBaseURL, TempHTML : ustring;
|
|
TempAnsi : AnsiString;
|
|
begin
|
|
Result := False;
|
|
TempHTML := aDragData.GetFragmentHtml;
|
|
|
|
if (length(TempHTML) > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := FHTMLFormat;
|
|
|
|
TempBaseURL := aDragData.GetFragmentBaseURL;
|
|
TempAnsi := HtmlToCFHtml(TempHTML, TempBaseURL) + #0;
|
|
Result := GetStorageForString(aMedium, TempAnsi);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_URL(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempURL, TempTitle : ustring;
|
|
begin
|
|
Result := False;
|
|
|
|
if aDragData.IsLink then
|
|
begin
|
|
TempURL := aDragData.GetLinkURL;
|
|
TempTitle := aDragData.GetLinkTitle;
|
|
|
|
if (length(TempURL) > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := FMozURLFormat;
|
|
|
|
if (length(TempTitle) > 0) then
|
|
TempURL := TempURL + #13 + TempTitle;
|
|
|
|
TempURL := TempURL + #0;
|
|
Result := GetStorageForString(aMedium, TempURL);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_FileDesc(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempFileName : ustring;
|
|
TempSize : cardinal;
|
|
begin
|
|
Result := False;
|
|
|
|
if aDragData.IsFile then
|
|
begin
|
|
TempSize := aDragData.GetFileContents(nil);
|
|
TempFileName := aDragData.GetFileName;
|
|
|
|
if (TempSize > 0) and (length(TempFileName) > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := FFileDescFormat;
|
|
|
|
TempFileName := TempFileName + #0;
|
|
Result := GetStorageForFileDescriptor(aMedium, TempFileName);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragDataToDataObject_FileContents(const aDragData : ICefDragData;
|
|
var aFormat : TFormatEtc;
|
|
var aMedium : TStgMedium) : boolean;
|
|
var
|
|
TempHandler : ICefWriteHandler;
|
|
TempWriter : ICefStreamWriter;
|
|
TempSize : cardinal;
|
|
begin
|
|
Result := False;
|
|
|
|
if aDragData.IsFile then
|
|
begin
|
|
TempSize := aDragData.GetFileContents(nil);
|
|
|
|
if (TempSize > 0) then
|
|
begin
|
|
aFormat.ptd := nil;
|
|
aFormat.dwAspect := DVASPECT_CONTENT;
|
|
aFormat.lindex := -1;
|
|
aFormat.tymed := TYMED_HGLOBAL;
|
|
aFormat.cfFormat := FFileContentsFormat;
|
|
|
|
TempHandler := TCefBytesWriteHandler.Create(TempSize);
|
|
TempWriter := TCefStreamWriterRef.CreateForHandler(TempHandler);
|
|
|
|
aDragData.GetFileContents(TempWriter);
|
|
|
|
TempSize := cardinal(TCefBytesWriteHandler(TempHandler).GetDataSize);
|
|
Result := GetStorageForBytes(aMedium, TCefBytesWriteHandler(TempHandler).GetData, TempSize);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.ZeroFiller(aNumber, aLength : integer) : AnsiString;
|
|
begin
|
|
Result := AnsiString(IntToStr(aNumber));
|
|
|
|
while (length(Result) < aLength) do Result := '0' + Result;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.HtmlToCFHtml(var aHTML, aBaseURL : ustring) : AnsiString;
|
|
const
|
|
CRLF : AnsiString = #13+#10;
|
|
HTML_START_TAG : AnsiString = '<html>';
|
|
HTML_END_TAG : AnsiString = '</html>';
|
|
BODY_START_TAG : AnsiString = '<body>';
|
|
BODY_END_TAG : AnsiString = '</body>';
|
|
FRAGMENT_START : AnsiString = '<!--StartFragment-->';
|
|
FRAGMENT_END : AnsiString = '<!--EndFragment-->';
|
|
PATTERN1 : AnsiString = '<<<<<1';
|
|
PATTERN2 : AnsiString = '<<<<<2';
|
|
PATTERN3 : AnsiString = '<<<<<3';
|
|
PATTERN4 : AnsiString = '<<<<<4';
|
|
var
|
|
TempString, TempDigits : AnsiString;
|
|
TempPos : integer;
|
|
begin
|
|
if (length(aHTML) = 0) then
|
|
begin
|
|
Result := '';
|
|
exit;
|
|
end;
|
|
|
|
TempString := 'Version:0.9' + CRLF +
|
|
'StartHTML:' + PATTERN1 + CRLF +
|
|
'EndHTML:' + PATTERN2 + CRLF +
|
|
'StartFragment:' + PATTERN3 + CRLF +
|
|
'EndFragment:' + PATTERN4 + CRLF +
|
|
'StartSelection:' + PATTERN3 + CRLF +
|
|
'EndSelection:' + PATTERN4;
|
|
|
|
if (length(aBaseURL) > 0) then
|
|
TempString := TempString + CRLF + 'SourceURL:' + Utf8Encode(aBaseURL);
|
|
|
|
TempString := TempString + CRLF +
|
|
HTML_START_TAG + CRLF +
|
|
BODY_START_TAG + CRLF +
|
|
FRAGMENT_START + CRLF +
|
|
Utf8Encode(aHTML) + CRLF +
|
|
FRAGMENT_END + CRLF +
|
|
BODY_END_TAG + CRLF +
|
|
HTML_END_TAG;
|
|
|
|
TempPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx(HTML_START_TAG, TempString) + length(HTML_START_TAG);
|
|
TempDigits := ZeroFiller(TempPos, length(PATTERN1));
|
|
TempString := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}StringReplace(TempString, PATTERN1, TempDigits, [rfReplaceAll]);
|
|
|
|
TempPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx(HTML_END_TAG, TempString);
|
|
TempDigits := ZeroFiller(TempPos, length(PATTERN2));
|
|
TempString := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}StringReplace(TempString, PATTERN2, TempDigits, [rfReplaceAll]);
|
|
|
|
TempPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx(FRAGMENT_START, TempString) + length(FRAGMENT_START);
|
|
TempDigits := ZeroFiller(TempPos, length(PATTERN3));
|
|
TempString := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}StringReplace(TempString, PATTERN3, TempDigits, [rfReplaceAll]);
|
|
|
|
TempPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx(FRAGMENT_END, TempString);
|
|
TempDigits := ZeroFiller(TempPos, length(PATTERN4));
|
|
TempString := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}StringReplace(TempString, PATTERN4, TempDigits, [rfReplaceAll]);
|
|
|
|
Result := TempString;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.FindStringField(const aString, aFieldName : AnsiString; var aPos : integer) : string;
|
|
var
|
|
TempLen, i, TempValuePos : integer;
|
|
TempString : AnsiString;
|
|
begin
|
|
aPos := pos(aFieldName, aString);
|
|
TempLen := length(aString);
|
|
|
|
if (aPos > 0) then
|
|
begin
|
|
TempValuePos := aPos + length(aFieldName);
|
|
i := TempValuePos;
|
|
|
|
while (i <= TempLen) and
|
|
{$IFDEF DELPHI12_UP}
|
|
not(CharInSet(aString[i], [#13, #10]))
|
|
{$ELSE}
|
|
not(aString[i] in [#13, #10])
|
|
{$ENDIF} do
|
|
inc(i);
|
|
|
|
TempString := copy(aString, TempValuePos, i - TempValuePos);
|
|
|
|
if (length(TempString) > 0) then
|
|
{$IFDEF DELPHI12_UP}
|
|
Result := UTF8ToString(TempString);
|
|
{$ELSE}
|
|
Result := UTF8Decode(TempString);
|
|
{$ENDIF}
|
|
end
|
|
else
|
|
Result := '';
|
|
end;
|
|
|
|
procedure TCEFDragAndDropMgr.CFHtmlToHtml(const cf_html : AnsiString; var html, base_url : string);
|
|
const
|
|
CFHTML_VERSION : AnsiString = 'Version:';
|
|
CFHTML_STARTHTML : AnsiString = 'StartHTML:';
|
|
CFHTML_ENDHTML : AnsiString = 'EndHTML:';
|
|
CFHTML_STARTFRAG : AnsiString = 'StartFragment:';
|
|
CFHTML_ENDFRAG : AnsiString = 'EndFragment:';
|
|
CFHTML_STARSEL : AnsiString = 'StartSelection:';
|
|
CFHTML_ENDSEL : AnsiString = 'EndSelection:';
|
|
CFHTML_SOURCEURL : AnsiString = 'SourceURL:';
|
|
FRAGMENT_START : AnsiString = '<!--StartFragment';
|
|
FRAGMENT_END : AnsiString = '<!--EndFragment';
|
|
var
|
|
TempHTMLStart, TempHTMLEnd : integer;
|
|
TempFragStart, TempFragEnd : integer;
|
|
TempVersionPos, TempSourcePos : integer;
|
|
TempHTMLStartPos, TempHTMLEndPos : integer;
|
|
TempFragStartPos, TempFragEndPos : integer;
|
|
TempFragStartCommentPos, TempFragEndCommentPos : integer;
|
|
begin
|
|
html := '';
|
|
base_url := '';
|
|
|
|
if (FindStringField(cf_html, CFHTML_VERSION, TempVersionPos) <> '0.9') then exit;
|
|
|
|
TempHTMLStart := StrToIntDef(FindStringField(cf_html, CFHTML_STARTHTML, TempHTMLStartPos), -1);
|
|
TempHTMLEnd := StrToIntDef(FindStringField(cf_html, CFHTML_ENDHTML, TempHTMLEndPos), -1);
|
|
TempFragStart := StrToIntDef(FindStringField(cf_html, CFHTML_STARTFRAG, TempFragStartPos), -1);
|
|
TempFragEnd := StrToIntDef(FindStringField(cf_html, CFHTML_ENDFRAG, TempFragEndPos), -1);
|
|
|
|
if (TempVersionPos < TempHTMLStartPos) and
|
|
(TempHTMLStartPos < TempHTMLEndPos) and
|
|
(TempHTMLEndPos < TempFragStartPos) and
|
|
(TempFragStartPos < TempFragEndPos) then
|
|
begin
|
|
TempFragStartCommentPos := pos(FRAGMENT_START, cf_html);
|
|
|
|
if (TempFragStartCommentPos > 0) then
|
|
TempFragStartCommentPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx('-->', cf_html, TempFragStartCommentPos + length(FRAGMENT_START));
|
|
|
|
if (TempFragStartCommentPos > 0) then
|
|
begin
|
|
TempFragStartCommentPos := TempFragStartCommentPos + 3;
|
|
TempFragEndCommentPos := {$IFDEF DELPHI12_UP}{$IFDEF DELPHI16_UP}System.{$ENDIF}AnsiStrings.{$ENDIF}PosEx(FRAGMENT_END, cf_html, TempFragStartCommentPos);
|
|
end
|
|
else
|
|
if (TempFragStart > 0) and
|
|
(TempFragEnd > 0) then
|
|
begin
|
|
TempFragStartCommentPos := TempFragStart;
|
|
TempFragEndCommentPos := TempFragEnd;
|
|
end
|
|
else
|
|
if (TempHTMLStart > 0) and
|
|
(TempHTMLEnd > 0) then
|
|
begin
|
|
TempFragStartCommentPos := TempHTMLStart;
|
|
TempFragEndCommentPos := TempHTMLEnd;
|
|
end
|
|
else
|
|
exit;
|
|
|
|
if (TempFragStartCommentPos > 0) and
|
|
(TempFragEndCommentPos > 0) and
|
|
(TempFragEndCommentPos > TempFragStartCommentPos) then
|
|
begin
|
|
{$IFDEF DELPHI12_UP}
|
|
html := UTF8ToString(copy(cf_html, TempFragStartCommentPos, TempFragEndCommentPos - TempFragStartCommentPos));
|
|
{$ELSE}
|
|
html := UTF8Decode(copy(cf_html, TempFragStartCommentPos, TempFragEndCommentPos - TempFragStartCommentPos));
|
|
{$ENDIF}
|
|
|
|
base_url := FindStringField(cf_html, CFHTML_SOURCEURL, TempSourcePos);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DataObjectToDragData_Unicode(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
var
|
|
TempText : string;
|
|
TempPointer : pointer;
|
|
begin
|
|
Result := False;
|
|
|
|
if (aMedium.hGlobal <> 0) then
|
|
begin
|
|
TempPointer := GlobalLock(aMedium.hGlobal);
|
|
|
|
if (TempPointer <> nil) then
|
|
begin
|
|
TempText := PWideChar(TempPointer);
|
|
aDragData.SetFragmentText(TempText);
|
|
GlobalUnlock(aMedium.hGlobal);
|
|
Result := True;
|
|
end;
|
|
|
|
ReleaseStgMedium(aMedium);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DataObjectToDragData_Text(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
var
|
|
TempText : string;
|
|
TempPointer : pointer;
|
|
begin
|
|
Result := False;
|
|
|
|
if (aMedium.hGlobal <> 0) then
|
|
begin
|
|
TempPointer := GlobalLock(aMedium.hGlobal);
|
|
|
|
if (TempPointer <> nil) then
|
|
begin
|
|
{$IFDEF DELPHI12_UP}
|
|
TempText := UTF8ToString(PAnsiChar(TempPointer));
|
|
{$ELSE}
|
|
TempText := UTF8Decode(PAnsiChar(TempPointer));
|
|
{$ENDIF}
|
|
|
|
aDragData.SetFragmentText(TempText);
|
|
GlobalUnlock(aMedium.hGlobal);
|
|
Result := True;
|
|
end;
|
|
|
|
ReleaseStgMedium(aMedium);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DataObjectToDragData_URL(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
var
|
|
TempText, TempURL, TempTitle : string;
|
|
TempPos : integer;
|
|
TempPointer : pointer;
|
|
begin
|
|
Result := False;
|
|
|
|
if (aMedium.hGlobal <> 0) then
|
|
begin
|
|
TempPointer := GlobalLock(aMedium.hGlobal);
|
|
|
|
if (TempPointer <> nil) then
|
|
begin
|
|
TempText := PWideChar(TempPointer);
|
|
TempPos := LastDelimiter(#13, TempText);
|
|
if (TempPos <= 0) then TempPos := LastDelimiter(#10, TempText);
|
|
|
|
if (TempPos > 0) then
|
|
begin
|
|
TempURL := copy(TempText, 1, pred(TempPos));
|
|
TempTitle := copy(TempText, succ(TempPos), length(TempText));
|
|
end
|
|
else
|
|
begin
|
|
TempURL := TempText;
|
|
TempTitle := TempText;
|
|
end;
|
|
|
|
aDragData.SetLinkURL(TempURL);
|
|
aDragData.SetLinkTitle(TempTitle);
|
|
GlobalUnlock(aMedium.hGlobal);
|
|
Result := True;
|
|
end;
|
|
|
|
ReleaseStgMedium(aMedium);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DataObjectToDragData_HTML(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
var
|
|
TempAnsi : AnsiString;
|
|
TempHTML, TempBaseURL : string;
|
|
TempPointer : pointer;
|
|
begin
|
|
Result := False;
|
|
|
|
if (aMedium.hGlobal <> 0) then
|
|
begin
|
|
TempPointer := GlobalLock(aMedium.hGlobal);
|
|
|
|
if (TempPointer <> nil) then
|
|
begin
|
|
TempAnsi := PAnsiChar(TempPointer);
|
|
|
|
CFHtmlToHtml(TempAnsi, TempHTML, TempBaseURL);
|
|
|
|
aDragData.SetFragmentHtml(TempHTML);
|
|
aDragData.SetFragmentBaseURL(TempBaseURL);
|
|
GlobalUnlock(aMedium.hGlobal);
|
|
Result := True;
|
|
end;
|
|
|
|
ReleaseStgMedium(aMedium);
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DataObjectToDragData_FileDrop(var aMedium : TStgMedium; var aDragData : ICefDragData) : boolean;
|
|
var
|
|
TempHdrop : HDROP;
|
|
TempNumFiles, i, TempLen : integer;
|
|
TempText, TempFilePath, TempFileName : string;
|
|
TempPointer : pointer;
|
|
TempAdded : boolean;
|
|
begin
|
|
Result := False;
|
|
|
|
if (aMedium.hGlobal <> 0) then
|
|
begin
|
|
TempPointer := GlobalLock(aMedium.hGlobal);
|
|
|
|
if (TempPointer <> nil) then
|
|
begin
|
|
TempHdrop := THandle(TempPointer);
|
|
TempNumFiles := DragQueryFile(TempHdrop, $FFFFFFFF, nil, 0);
|
|
TempAdded := False;
|
|
i := 0;
|
|
|
|
SetLength(TempText, succ(MAX_PATH));
|
|
|
|
while (i < TempNumFiles) do
|
|
begin
|
|
TempLen := DragQueryFile(TempHdrop, i, @TempText[1], succ(MAX_PATH));
|
|
|
|
if (TempLen > 0) then
|
|
begin
|
|
TempFilePath := copy(TempText, 1, TempLen);
|
|
TempFileName := ExtractFileName(TempFilePath);
|
|
TempAdded := True;
|
|
|
|
if (length(TempFileName) > 0) then
|
|
aDragData.AddFile(TempFilePath, TempFileName)
|
|
else
|
|
aDragData.AddFile(TempFilePath, TempFilePath);
|
|
end;
|
|
|
|
inc(i);
|
|
end;
|
|
|
|
GlobalUnlock(aMedium.hGlobal);
|
|
DragFinish(TempHdrop);
|
|
Result := TempAdded;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TCEFDragAndDropMgr.DataObjectToDragData(const aDataObject : IDataObject; var aDragData : ICefDragData);
|
|
var
|
|
TempEnumFrmt : IEnumFormatEtc;
|
|
TempFormat : TFormatEtc;
|
|
TempMedium : TStgMedium;
|
|
TempUsed : boolean;
|
|
begin
|
|
try
|
|
aDragData := TCefDragDataRef.New;
|
|
|
|
if (aDataObject <> nil) and (aDataObject.EnumFormatEtc(DATADIR_GET, TempEnumFrmt) = S_OK) then
|
|
begin
|
|
TempEnumFrmt.Reset;
|
|
TempUsed := False;
|
|
|
|
while (TempEnumFrmt.Next(1, TempFormat, nil) = S_OK) and not(TempUsed) do
|
|
begin
|
|
try
|
|
{$IFNDEF FPC}
|
|
TempMedium.unkForRelease := nil;
|
|
{$ELSE}
|
|
TempMedium.PUnkForRelease := nil;
|
|
{$ENDIF}
|
|
|
|
if ((TempFormat.tymed and TYMED_HGLOBAL) <> 0) and
|
|
(aDataObject.GetData(TempFormat, TempMedium) = S_OK) then
|
|
begin
|
|
if (TempFormat.cfFormat = CF_UNICODETEXT) then TempUsed := DataObjectToDragData_Unicode(TempMedium, aDragData)
|
|
else if (TempFormat.cfFormat = CF_TEXT) then TempUsed := DataObjectToDragData_Text(TempMedium, aDragData)
|
|
else if (TempFormat.cfFormat = FMozURLFormat) then TempUsed := DataObjectToDragData_URL(TempMedium, aDragData)
|
|
else if (TempFormat.cfFormat = FHTMLFormat) then TempUsed := DataObjectToDragData_HTML(TempMedium, aDragData)
|
|
else if (TempFormat.cfFormat = CF_HDROP) then TempUsed := DataObjectToDragData_FileDrop(TempMedium, aDragData)
|
|
else ReleaseStgMedium(TempMedium);
|
|
end;
|
|
finally
|
|
if (TempFormat.ptd <> nil) then
|
|
begin
|
|
CoTaskMemFree(TempFormat.ptd);
|
|
TempFormat.ptd := nil;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCEFDragAndDropMgr.DataObjectToDragData', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.StartDragging : TCefDragOperation;
|
|
var
|
|
TempDataObject : IDataObject;
|
|
TempDropSource : IDropSource;
|
|
TempResEffect : integer;
|
|
TempResult : HRESULT;
|
|
TempFormatArray : TOLEFormatArray;
|
|
TempMediumArray : TOLEMediumArray;
|
|
i : integer;
|
|
begin
|
|
Result := DRAG_OPERATION_NONE;
|
|
|
|
if (FCurrentDragData <> nil) then
|
|
begin
|
|
i := 0;
|
|
|
|
if DragDataToDataObject_Unicode(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
if DragDataToDataObject_Text(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
if DragDataToDataObject_URL(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
if DragDataToDataObject_HTML(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
if DragDataToDataObject_FileDesc(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
if DragDataToDataObject_FileContents(FCurrentDragData, TempFormatArray[i], TempMediumArray[i]) then inc(i);
|
|
|
|
if (i > 0) then
|
|
begin
|
|
TempResEffect := DROPEFFECT_NONE;
|
|
TempDataObject := TOLEDataObject.Create(TempFormatArray, TempMediumArray, i);
|
|
TempDropSource := TOLEDropSource.Create;
|
|
{$IFNDEF FPC}
|
|
TempResult := DoDragDrop(TempDataObject, TempDropSource, FOLEEffect, TempResEffect);
|
|
{$ELSE}
|
|
TempResult := DoDragDrop(TempDataObject, TempDropSource, DWORD(FOLEEffect), LPDWORD(TempResEffect));
|
|
{$ENDIF}
|
|
|
|
if (TempResult <> DRAGDROP_S_DROP) then TempResEffect := DROPEFFECT_NONE;
|
|
FCurrentDragData := nil;
|
|
|
|
DropEffectToDragOperation(TempResEffect, Result);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.CloneDragData(const aDragData : ICefDragData; aAllowedOps : TCefDragOperations) : boolean;
|
|
begin
|
|
if (aDragData <> nil) and
|
|
((length(aDragData.GetFragmentText) > 0) or
|
|
(length(aDragData.GetFragmentHTML) > 0) or
|
|
aDragData.IsLink or
|
|
aDragData.IsFile) then
|
|
begin
|
|
DragOperationToDropEffect(aAllowedOps, FOLEEffect);
|
|
|
|
FCurrentDragData := aDragData.Clone;
|
|
FCurrentDragData.ResetFileContents;
|
|
|
|
Result := True;
|
|
end
|
|
else
|
|
Result := False;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragEnter(const dataObj : IDataObject;
|
|
grfKeyState : Longint;
|
|
pt : TPoint;
|
|
var dwEffect : Longint): HRESULT;
|
|
var
|
|
TempDragData : ICefDragData;
|
|
begin
|
|
if assigned(FOnDragEnter) then
|
|
begin
|
|
if (FCurrentDragData <> nil) then
|
|
TempDragData := FCurrentDragData
|
|
else
|
|
DataObjectToDragData(dataObj, TempDragData);
|
|
|
|
FOnDragEnter(self, TempDragData, grfKeyState, pt, dwEffect);
|
|
Result := S_OK;
|
|
end
|
|
else
|
|
Result := E_UNEXPECTED;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragOver(grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult;
|
|
begin
|
|
if assigned(FOnDragOver) then
|
|
begin
|
|
FOnDragOver(self, grfKeyState, pt, dwEffect);
|
|
Result := S_OK;
|
|
end
|
|
else
|
|
Result := E_UNEXPECTED;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.DragLeave: HResult;
|
|
begin
|
|
if assigned(FOnDragLeave) then
|
|
begin
|
|
FOnDragLeave(self);
|
|
Result := S_OK;
|
|
end
|
|
else
|
|
Result := E_UNEXPECTED;
|
|
end;
|
|
|
|
function TCEFDragAndDropMgr.Drop(const dataObj : IDataObject;
|
|
grfKeyState : Longint;
|
|
pt : TPoint;
|
|
var dwEffect : Longint): HResult;
|
|
|
|
begin
|
|
if assigned(FOnDrop) then
|
|
begin
|
|
FOnDrop(self, grfKeyState, pt, dwEffect);
|
|
Result := S_OK;
|
|
end
|
|
else
|
|
Result := E_UNEXPECTED;
|
|
end;
|
|
|
|
end.
|