37146d3352
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53984 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
647 lines
22 KiB
C++
647 lines
22 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: htmlwin.h
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// Purpose: wxHtmlWindow class for parsing & displaying HTML
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// Author: Vaclav Slavik
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// RCS-ID: $Id$
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_HTMLWIN_H_
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#define _WX_HTMLWIN_H_
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#include "wx/defs.h"
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#if wxUSE_HTML
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#include "wx/window.h"
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#include "wx/scrolwin.h"
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#include "wx/config.h"
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#include "wx/stopwatch.h"
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#include "wx/html/winpars.h"
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#include "wx/html/htmlcell.h"
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#include "wx/filesys.h"
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#include "wx/html/htmlfilt.h"
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#include "wx/filename.h"
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#include "wx/bitmap.h"
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class wxHtmlProcessor;
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class wxHtmlWinModule;
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class wxHtmlHistoryArray;
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class wxHtmlProcessorList;
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class WXDLLIMPEXP_FWD_HTML wxHtmlWinAutoScrollTimer;
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class WXDLLIMPEXP_FWD_HTML wxHtmlCellEvent;
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class WXDLLIMPEXP_FWD_HTML wxHtmlLinkEvent;
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class WXDLLIMPEXP_FWD_CORE wxStatusBar;
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// wxHtmlWindow flags:
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#define wxHW_SCROLLBAR_NEVER 0x0002
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#define wxHW_SCROLLBAR_AUTO 0x0004
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#define wxHW_NO_SELECTION 0x0008
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#define wxHW_DEFAULT_STYLE wxHW_SCROLLBAR_AUTO
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/// Enum for wxHtmlWindow::OnOpeningURL and wxHtmlWindowInterface::OnOpeningURL
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enum wxHtmlOpeningStatus
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{
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/// Open the requested URL
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wxHTML_OPEN,
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/// Do not open the URL
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wxHTML_BLOCK,
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/// Redirect to another URL (returned from OnOpeningURL)
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wxHTML_REDIRECT
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};
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/**
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Abstract interface to a HTML rendering window (such as wxHtmlWindow or
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wxHtmlListBox) that is passed to wxHtmlWinParser. It encapsulates all
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communication from the parser to the window.
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*/
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class WXDLLIMPEXP_HTML wxHtmlWindowInterface
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{
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public:
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/// Ctor
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wxHtmlWindowInterface() {}
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virtual ~wxHtmlWindowInterface() {}
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/**
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Called by the parser to set window's title to given text.
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*/
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virtual void SetHTMLWindowTitle(const wxString& title) = 0;
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/**
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Called when a link is clicked.
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@param link information about the clicked link
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*/
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virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link) = 0;
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/**
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Called when the parser needs to open another URL (e.g. an image).
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@param type Type of the URL request (e.g. image)
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@param url URL the parser wants to open
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@param redirect If the return value is wxHTML_REDIRECT, then the
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URL to redirect to will be stored in this variable
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(the pointer must never be NULL)
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@return indicator of how to treat the request
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*/
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virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
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const wxString& url,
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wxString *redirect) const = 0;
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/**
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Converts coordinates @a pos relative to given @a cell to
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physical coordinates in the window.
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*/
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virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
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const wxPoint& pos) const = 0;
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/// Returns the window used for rendering (may be NULL).
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virtual wxWindow* GetHTMLWindow() = 0;
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/// Returns background colour to use by default.
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virtual wxColour GetHTMLBackgroundColour() const = 0;
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/// Sets window's background to colour @a clr.
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virtual void SetHTMLBackgroundColour(const wxColour& clr) = 0;
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/// Sets window's background to given bitmap.
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virtual void SetHTMLBackgroundImage(const wxBitmap& bmpBg) = 0;
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/// Sets status bar text.
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virtual void SetHTMLStatusText(const wxString& text) = 0;
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/// Type of mouse cursor
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enum HTMLCursor
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{
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/// Standard mouse cursor (typically an arrow)
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HTMLCursor_Default,
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/// Cursor shown over links
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HTMLCursor_Link,
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/// Cursor shown over selectable text
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HTMLCursor_Text
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};
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/**
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Returns mouse cursor of given @a type.
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*/
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virtual wxCursor GetHTMLCursor(HTMLCursor type) const = 0;
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};
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/**
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Helper class that implements part of mouse handling for wxHtmlWindow and
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wxHtmlListBox. Cursor changes and clicking on links are handled, text
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selection is not.
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*/
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class WXDLLIMPEXP_HTML wxHtmlWindowMouseHelper
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{
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protected:
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/**
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Ctor.
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@param iface Interface to the owner window.
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*/
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wxHtmlWindowMouseHelper(wxHtmlWindowInterface *iface);
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/**
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Virtual dtor.
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It is not really needed in this case but at leats it prevents gcc from
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complaining about its absence.
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*/
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virtual ~wxHtmlWindowMouseHelper() { }
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/// Returns true if the mouse moved since the last call to HandleIdle
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bool DidMouseMove() const { return m_tmpMouseMoved; }
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/// Call this from EVT_MOTION event handler
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void HandleMouseMoved();
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/**
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Call this from EVT_LEFT_UP handler (or, alternatively, EVT_LEFT_DOWN).
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@param rootCell HTML cell inside which the click occured. This doesn't
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have to be the leaf cell, it can be e.g. toplevel
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container, but the mouse must be inside the container's
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area, otherwise the event would be ignored.
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@param pos Mouse position in coordinates relative to @a cell
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@param event The event that triggered the call
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*/
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bool HandleMouseClick(wxHtmlCell *rootCell,
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const wxPoint& pos, const wxMouseEvent& event);
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/**
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Call this from OnInternalIdle of the HTML displaying window. Handles
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mouse movements and must be used together with HandleMouseMoved.
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@param rootCell HTML cell inside which the click occured. This doesn't
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have to be the leaf cell, it can be e.g. toplevel
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container, but the mouse must be inside the container's
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area, otherwise the event would be ignored.
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@param pos Current mouse position in coordinates relative to
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@a cell
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*/
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void HandleIdle(wxHtmlCell *rootCell, const wxPoint& pos);
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/**
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Called by HandleIdle when the mouse hovers over a cell. Default
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behaviour is to do nothing.
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@param cell the cell the mouse is over
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@param x, y coordinates of mouse relative to the cell
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*/
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virtual void OnCellMouseHover(wxHtmlCell *cell, wxCoord x, wxCoord y);
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/**
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Called by HandleMouseClick when the user clicks on a cell.
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Default behavior is to call wxHtmlWindowInterface::OnLinkClicked()
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if this cell corresponds to a hypertext link.
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@param cell the cell the mouse is over
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@param x, y coordinates of mouse relative to the cell
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@param event The event that triggered the call
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@return true if a link was clicked, false otherwise.
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*/
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virtual bool OnCellClicked(wxHtmlCell *cell,
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wxCoord x, wxCoord y,
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const wxMouseEvent& event);
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protected:
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// this flag indicates if the mouse moved (used by HandleIdle)
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bool m_tmpMouseMoved;
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// contains last link name
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wxHtmlLinkInfo *m_tmpLastLink;
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// contains the last (terminal) cell which contained the mouse
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wxHtmlCell *m_tmpLastCell;
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private:
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wxHtmlWindowInterface *m_interface;
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};
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// ----------------------------------------------------------------------------
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// wxHtmlWindow
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// (This is probably the only class you will directly use.)
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// Purpose of this class is to display HTML page (either local
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// file or downloaded via HTTP protocol) in a window. Width of
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// window is constant - given in constructor - virtual height
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// is changed dynamicly depending on page size. Once the
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// window is created you can set it's content by calling
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// SetPage(text) or LoadPage(filename).
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_HTML wxHtmlWindow : public wxScrolledWindow,
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public wxHtmlWindowInterface,
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public wxHtmlWindowMouseHelper
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{
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DECLARE_DYNAMIC_CLASS(wxHtmlWindow)
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friend class wxHtmlWinModule;
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public:
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wxHtmlWindow() : wxHtmlWindowMouseHelper(this) { Init(); }
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wxHtmlWindow(wxWindow *parent, wxWindowID id = wxID_ANY,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxHW_DEFAULT_STYLE,
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const wxString& name = wxT("htmlWindow"))
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: wxHtmlWindowMouseHelper(this)
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{
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Init();
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Create(parent, id, pos, size, style, name);
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}
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virtual ~wxHtmlWindow();
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bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxHW_SCROLLBAR_AUTO,
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const wxString& name = wxT("htmlWindow"));
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// Set HTML page and display it. !! source is HTML document itself,
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// it is NOT address/filename of HTML document. If you want to
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// specify document location, use LoadPage() istead
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// Return value : false if an error occurred, true otherwise
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virtual bool SetPage(const wxString& source);
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// Append to current page
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bool AppendToPage(const wxString& source);
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// Load HTML page from given location. Location can be either
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// a) /usr/wxGTK2/docs/html/wx.htm
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// b) http://www.somewhere.uk/document.htm
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// c) ftp://ftp.somesite.cz/pub/something.htm
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// In case there is no prefix (http:,ftp:), the method
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// will try to find it itself (1. local file, then http or ftp)
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// After the page is loaded, the method calls SetPage() to display it.
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// Note : you can also use path relative to previously loaded page
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// Return value : same as SetPage
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virtual bool LoadPage(const wxString& location);
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// Loads HTML page from file
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bool LoadFile(const wxFileName& filename);
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// Returns full location of opened page
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wxString GetOpenedPage() const {return m_OpenedPage;}
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// Returns anchor within opened page
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wxString GetOpenedAnchor() const {return m_OpenedAnchor;}
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// Returns <TITLE> of opened page or empty string otherwise
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wxString GetOpenedPageTitle() const {return m_OpenedPageTitle;}
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// Sets frame in which page title will be displayed. Format is format of
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// frame title, e.g. "HtmlHelp : %s". It must contain exactly one %s
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void SetRelatedFrame(wxFrame* frame, const wxString& format);
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wxFrame* GetRelatedFrame() const {return m_RelatedFrame;}
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#if wxUSE_STATUSBAR
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// After(!) calling SetRelatedFrame, this sets statusbar slot where messages
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// will be displayed. Default is -1 = no messages.
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void SetRelatedStatusBar(int index);
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void SetRelatedStatusBar(wxStatusBar*, int index = 0);
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#endif // wxUSE_STATUSBAR
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// Sets fonts to be used when displaying HTML page.
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void SetFonts(const wxString& normal_face, const wxString& fixed_face,
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const int *sizes = NULL);
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// Sets font sizes to be relative to the given size or the system
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// default size; use either specified or default font
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void SetStandardFonts(int size = -1,
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const wxString& normal_face = wxEmptyString,
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const wxString& fixed_face = wxEmptyString);
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// Sets space between text and window borders.
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void SetBorders(int b) {m_Borders = b;}
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// Sets the bitmap to use for background (currnetly it will be tiled,
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// when/if we have CSS support we could add other possibilities...)
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void SetBackgroundImage(const wxBitmap& bmpBg) { m_bmpBg = bmpBg; }
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// Saves custom settings into cfg config. it will use the path 'path'
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// if given, otherwise it will save info into currently selected path.
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// saved values : things set by SetFonts, SetBorders.
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virtual void ReadCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
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// ...
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virtual void WriteCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
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// Goes to previous/next page (in browsing history)
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// Returns true if successful, false otherwise
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bool HistoryBack();
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bool HistoryForward();
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bool HistoryCanBack();
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bool HistoryCanForward();
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// Resets history
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void HistoryClear();
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// Returns pointer to conteiners/cells structure.
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// It should be used ONLY when printing
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wxHtmlContainerCell* GetInternalRepresentation() const {return m_Cell;}
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// Adds input filter
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static void AddFilter(wxHtmlFilter *filter);
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// Returns a pointer to the parser.
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wxHtmlWinParser *GetParser() const { return m_Parser; }
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// Adds HTML processor to this instance of wxHtmlWindow:
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void AddProcessor(wxHtmlProcessor *processor);
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// Adds HTML processor to wxHtmlWindow class as whole:
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static void AddGlobalProcessor(wxHtmlProcessor *processor);
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// -- Callbacks --
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// Sets the title of the window
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// (depending on the information passed to SetRelatedFrame() method)
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virtual void OnSetTitle(const wxString& title);
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// Called when user clicked on hypertext link. Default behavior is to
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// call LoadPage(loc)
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virtual void OnLinkClicked(const wxHtmlLinkInfo& link);
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// Called when wxHtmlWindow wants to fetch data from an URL (e.g. when
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// loading a page or loading an image). The data are downloaded if and only if
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// OnOpeningURL returns true. If OnOpeningURL returns wxHTML_REDIRECT,
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// it must set *redirect to the new URL
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virtual wxHtmlOpeningStatus OnOpeningURL(wxHtmlURLType WXUNUSED(type),
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const wxString& WXUNUSED(url),
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wxString *WXUNUSED(redirect)) const
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{ return wxHTML_OPEN; }
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#if wxUSE_CLIPBOARD
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// Helper functions to select parts of page:
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void SelectWord(const wxPoint& pos);
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void SelectLine(const wxPoint& pos);
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void SelectAll();
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// Convert selection to text:
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wxString SelectionToText() { return DoSelectionToText(m_selection); }
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// Converts current page to text:
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wxString ToText();
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#endif // wxUSE_CLIPBOARD
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virtual void OnInternalIdle();
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/// Returns standard HTML cursor as used by wxHtmlWindow
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static wxCursor GetDefaultHTMLCursor(HTMLCursor type);
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protected:
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void Init();
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// Scrolls to anchor of this name. (Anchor is #news
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// or #features etc. it is part of address sometimes:
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// http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
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// Return value : true if anchor exists, false otherwise
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bool ScrollToAnchor(const wxString& anchor);
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// Prepares layout (= fill m_PosX, m_PosY for fragments) based on
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// actual size of window. This method also setup scrollbars
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void CreateLayout();
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void OnEraseBackground(wxEraseEvent& event);
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void OnPaint(wxPaintEvent& event);
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void OnSize(wxSizeEvent& event);
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void OnMouseMove(wxMouseEvent& event);
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void OnMouseDown(wxMouseEvent& event);
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void OnMouseUp(wxMouseEvent& event);
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#if wxUSE_CLIPBOARD
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void OnKeyUp(wxKeyEvent& event);
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void OnDoubleClick(wxMouseEvent& event);
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void OnCopy(wxCommandEvent& event);
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void OnClipboardEvent(wxClipboardTextEvent& event);
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void OnMouseEnter(wxMouseEvent& event);
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void OnMouseLeave(wxMouseEvent& event);
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void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
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#endif // wxUSE_CLIPBOARD
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// Returns new filter (will be stored into m_DefaultFilter variable)
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virtual wxHtmlFilter *GetDefaultFilter() {return new wxHtmlFilterPlainText;}
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// cleans static variables
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static void CleanUpStatics();
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// Returns true if text selection is enabled (wxClipboard must be available
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// and wxHW_NO_SELECTION not used)
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bool IsSelectionEnabled() const;
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enum ClipboardType
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{
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Primary,
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Secondary
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};
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// Copies selection to clipboard if the clipboard support is available
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//
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// returns true if anything was copied to clipboard, false otherwise
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bool CopySelection(ClipboardType t = Secondary);
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#if wxUSE_CLIPBOARD
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// Automatic scrolling during selection:
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void StopAutoScrolling();
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#endif // wxUSE_CLIPBOARD
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wxString DoSelectionToText(wxHtmlSelection *sel);
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public:
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// wxHtmlWindowInterface methods:
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virtual void SetHTMLWindowTitle(const wxString& title);
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virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link);
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virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
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const wxString& url,
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wxString *redirect) const;
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virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
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const wxPoint& pos) const;
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virtual wxWindow* GetHTMLWindow();
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virtual wxColour GetHTMLBackgroundColour() const;
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virtual void SetHTMLBackgroundColour(const wxColour& clr);
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virtual void SetHTMLBackgroundImage(const wxBitmap& bmpBg);
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virtual void SetHTMLStatusText(const wxString& text);
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virtual wxCursor GetHTMLCursor(HTMLCursor type) const;
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// implementation of SetPage()
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bool DoSetPage(const wxString& source);
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protected:
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// This is pointer to the first cell in parsed data. (Note: the first cell
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// is usually top one = all other cells are sub-cells of this one)
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wxHtmlContainerCell *m_Cell;
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// parser which is used to parse HTML input.
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// Each wxHtmlWindow has it's own parser because sharing one global
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// parser would be problematic (because of reentrancy)
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wxHtmlWinParser *m_Parser;
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// contains name of actualy opened page or empty string if no page opened
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wxString m_OpenedPage;
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// contains name of current anchor within m_OpenedPage
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wxString m_OpenedAnchor;
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// contains title of actualy opened page or empty string if no <TITLE> tag
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wxString m_OpenedPageTitle;
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// class for opening files (file system)
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wxFileSystem* m_FS;
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// frame in which page title should be displayed & number of it's statusbar
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// reserved for usage with this html window
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wxFrame *m_RelatedFrame;
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#if wxUSE_STATUSBAR
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int m_RelatedStatusBarIndex;
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wxStatusBar* m_RelatedStatusBar;
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#endif // wxUSE_STATUSBAR
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wxString m_TitleFormat;
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// borders (free space between text and window borders)
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// defaults to 10 pixels.
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int m_Borders;
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// current text selection or NULL
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wxHtmlSelection *m_selection;
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// true if the user is dragging mouse to select text
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bool m_makingSelection;
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#if wxUSE_CLIPBOARD
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// time of the last doubleclick event, used to detect tripleclicks
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// (tripleclicks are used to select whole line):
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wxMilliClock_t m_lastDoubleClick;
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// helper class to automatically scroll the window if the user is selecting
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// text and the mouse leaves wxHtmlWindow:
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wxHtmlWinAutoScrollTimer *m_timerAutoScroll;
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#endif // wxUSE_CLIPBOARD
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|
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private:
|
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// window content for double buffered rendering:
|
|
wxBitmap *m_backBuffer;
|
|
|
|
// background image, may be invalid
|
|
wxBitmap m_bmpBg;
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|
|
|
// variables used when user is selecting text
|
|
wxPoint m_tmpSelFromPos;
|
|
wxHtmlCell *m_tmpSelFromCell;
|
|
|
|
// if >0 contents of the window is not redrawn
|
|
// (in order to avoid ugly blinking)
|
|
int m_tmpCanDrawLocks;
|
|
|
|
// list of HTML filters
|
|
static wxList m_Filters;
|
|
// this filter is used when no filter is able to read some file
|
|
static wxHtmlFilter *m_DefaultFilter;
|
|
|
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// html processors array:
|
|
wxHtmlProcessorList *m_Processors;
|
|
static wxHtmlProcessorList *m_GlobalProcessors;
|
|
|
|
// browser history
|
|
wxHtmlHistoryArray *m_History;
|
|
int m_HistoryPos;
|
|
// if this FLAG is false, items are not added to history
|
|
bool m_HistoryOn;
|
|
|
|
// a flag set if we need to erase background in OnPaint() (otherwise this
|
|
// is supposed to have been done in OnEraseBackground())
|
|
bool m_eraseBgInOnPaint;
|
|
|
|
// standard mouse cursors
|
|
static wxCursor *ms_cursorLink;
|
|
static wxCursor *ms_cursorText;
|
|
|
|
DECLARE_EVENT_TABLE()
|
|
DECLARE_NO_COPY_CLASS(wxHtmlWindow)
|
|
};
|
|
|
|
|
|
extern WXDLLIMPEXP_HTML const wxEventType wxEVT_COMMAND_HTML_CELL_CLICKED;
|
|
extern WXDLLIMPEXP_HTML const wxEventType wxEVT_COMMAND_HTML_CELL_HOVER;
|
|
extern WXDLLIMPEXP_HTML const wxEventType wxEVT_COMMAND_HTML_LINK_CLICKED;
|
|
|
|
|
|
/*!
|
|
* Html cell window event
|
|
*/
|
|
|
|
class WXDLLIMPEXP_HTML wxHtmlCellEvent : public wxCommandEvent
|
|
{
|
|
public:
|
|
wxHtmlCellEvent() {}
|
|
wxHtmlCellEvent(wxEventType commandType, int id,
|
|
wxHtmlCell *cell, const wxPoint &pt,
|
|
const wxMouseEvent &ev)
|
|
: wxCommandEvent(commandType, id)
|
|
{
|
|
m_cell = cell;
|
|
m_pt = pt;
|
|
m_mouseEvent = ev;
|
|
m_bLinkWasClicked = false;
|
|
}
|
|
|
|
wxHtmlCell* GetCell() const { return m_cell; }
|
|
wxPoint GetPoint() const { return m_pt; }
|
|
wxMouseEvent GetMouseEvent() const { return m_mouseEvent; }
|
|
|
|
void SetLinkClicked(bool linkclicked) { m_bLinkWasClicked=linkclicked; }
|
|
bool GetLinkClicked() const { return m_bLinkWasClicked; }
|
|
|
|
// default copy ctor, assignment operator and dtor are ok
|
|
virtual wxEvent *Clone() const { return new wxHtmlCellEvent(*this); }
|
|
|
|
private:
|
|
wxHtmlCell *m_cell;
|
|
wxMouseEvent m_mouseEvent;
|
|
wxPoint m_pt;
|
|
|
|
bool m_bLinkWasClicked;
|
|
|
|
DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlCellEvent)
|
|
};
|
|
|
|
|
|
|
|
/*!
|
|
* Html link event
|
|
*/
|
|
|
|
class WXDLLIMPEXP_HTML wxHtmlLinkEvent : public wxCommandEvent
|
|
{
|
|
public:
|
|
wxHtmlLinkEvent() {}
|
|
wxHtmlLinkEvent(int id, const wxHtmlLinkInfo &linkinfo)
|
|
: wxCommandEvent(wxEVT_COMMAND_HTML_LINK_CLICKED, id)
|
|
{
|
|
m_linkInfo = linkinfo;
|
|
}
|
|
|
|
const wxHtmlLinkInfo &GetLinkInfo() const { return m_linkInfo; }
|
|
|
|
// default copy ctor, assignment operator and dtor are ok
|
|
virtual wxEvent *Clone() const { return new wxHtmlLinkEvent(*this); }
|
|
|
|
private:
|
|
wxHtmlLinkInfo m_linkInfo;
|
|
|
|
DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlLinkEvent)
|
|
};
|
|
|
|
|
|
typedef void (wxEvtHandler::*wxHtmlCellEventFunction)(wxHtmlCellEvent&);
|
|
typedef void (wxEvtHandler::*wxHtmlLinkEventFunction)(wxHtmlLinkEvent&);
|
|
|
|
#define wxHtmlCellEventHandler(func) \
|
|
(wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxHtmlCellEventFunction, &func)
|
|
#define wxHtmlLinkEventHandler(func) \
|
|
(wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxHtmlLinkEventFunction, &func)
|
|
|
|
#define EVT_HTML_CELL_CLICKED(id, fn) \
|
|
wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_CELL_CLICKED, id, wxHtmlCellEventHandler(fn))
|
|
#define EVT_HTML_CELL_HOVER(id, fn) \
|
|
wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_CELL_HOVER, id, wxHtmlCellEventHandler(fn))
|
|
#define EVT_HTML_LINK_CLICKED(id, fn) \
|
|
wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_LINK_CLICKED, id, wxHtmlLinkEventHandler(fn))
|
|
|
|
|
|
#endif // wxUSE_HTML
|
|
|
|
#endif // _WX_HTMLWIN_H_
|
|
|