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      1 /*
      2  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #ifndef RenderFileUploadControl_h
     22 #define RenderFileUploadControl_h
     23 
     24 #include "FileChooser.h"
     25 #include "RenderBlock.h"
     26 
     27 namespace WebCore {
     28 
     29 class HTMLInputElement;
     30 
     31 // Each RenderFileUploadControl contains a RenderButton (for opening the file chooser), and
     32 // sufficient space to draw a file icon and filename. The RenderButton has a shadow node
     33 // associated with it to receive click/hover events.
     34 
     35 class RenderFileUploadControl : public RenderBlock, private FileChooserClient {
     36 public:
     37     RenderFileUploadControl(HTMLInputElement*);
     38     virtual ~RenderFileUploadControl();
     39 
     40     virtual bool isFileUploadControl() const { return true; }
     41 
     42     void click();
     43 
     44     void valueChanged();
     45 
     46     void receiveDroppedFiles(const Vector<String>&);
     47 
     48     String buttonValue();
     49     String fileTextValue() const;
     50 
     51     bool allowsMultipleFiles();
     52     String acceptTypes();
     53 
     54 private:
     55     virtual const char* renderName() const { return "RenderFileUploadControl"; }
     56 
     57     virtual void updateFromElement();
     58     virtual void calcPrefWidths();
     59     virtual void paintObject(PaintInfo&, int tx, int ty);
     60 
     61     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     62 
     63     int maxFilenameWidth() const;
     64     PassRefPtr<RenderStyle> createButtonStyle(const RenderStyle* parentStyle) const;
     65 
     66     RefPtr<HTMLInputElement> m_button;
     67     RefPtr<FileChooser> m_fileChooser;
     68 };
     69 
     70 inline RenderFileUploadControl* toRenderFileUploadControl(RenderObject* object)
     71 {
     72     ASSERT(!object || object->isFileUploadControl());
     73     return static_cast<RenderFileUploadControl*>(object);
     74 }
     75 
     76 inline const RenderFileUploadControl* toRenderFileUploadControl(const RenderObject* object)
     77 {
     78     ASSERT(!object || object->isFileUploadControl());
     79     return static_cast<const RenderFileUploadControl*>(object);
     80 }
     81 
     82 // This will catch anyone doing an unnecessary cast.
     83 void toRenderFileUploadControl(const RenderFileUploadControl*);
     84 
     85 } // namespace WebCore
     86 
     87 #endif // RenderFileUploadControl_h
     88