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Add support for searching and highlighting a wxWebView.

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Currently supports WebView on GTK and IE. Closes #14045.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72390 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Steve Lamerton
2012-08-28 17:13:13 +00:00
parent de3d7096fe
commit 66ac040060
9 changed files with 609 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

283
src/msw/webview_ie.cpp
View File

@@ -39,6 +39,12 @@ DEFINE_GUID(wxIID_IInternetProtocolRoot,0x79eac9e3,0xbaf9,0x11ce,0x8c,0x82,0,0xa
DEFINE_GUID(wxIID_IInternetProtocol,0x79eac9e4,0xbaf9,0x11ce,0x8c,0x82,0,0xaa,0,0x4b,0xa9,0xb);
DEFINE_GUID(wxIID_IDocHostUIHandler, 0xbd3f23c0, 0xd43e, 0x11cf, 0x89, 0x3b, 0x00, 0xaa, 0x00, 0xbd, 0xce, 0x1a);
enum //Internal find flags
{
wxWEB_VIEW_FIND_ADD_POINTERS = 0x0001,
wxWEB_VIEW_FIND_REMOVE_HIGHLIGHT = 0x0002
};
}
wxIMPLEMENT_DYNAMIC_CLASS(wxWebViewIE, wxWebView);
@@ -68,6 +74,7 @@ bool wxWebViewIE::Create(wxWindow* parent,
m_historyEnabled = true;
m_historyPosition = -1;
m_zoomType = wxWEB_VIEW_ZOOM_TYPE_TEXT;
FindClear();
if (::CoCreateInstance(CLSID_WebBrowser, NULL,
CLSCTX_INPROC_SERVER, // CLSCTX_INPROC,
@@ -98,6 +105,7 @@ wxWebViewIE::~wxWebViewIE()
{
m_factories[i]->Release();
}
FindClear();
}
void wxWebViewIE::LoadURL(const wxString& url)
@@ -591,6 +599,53 @@ void wxWebViewIE::Redo()
ExecCommand("Redo");
}
long wxWebViewIE::Find(const wxString& text, int flags)
{
//If the text is empty then we clear.
if(text.IsEmpty())
{
ClearSelection();
if(m_findFlags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT)
{
FindInternal(m_findText, (m_findFlags &~ wxWEB_VIEW_FIND_HIGHLIGHT_RESULT), wxWEB_VIEW_FIND_REMOVE_HIGHLIGHT);
}
FindClear();
return wxNOT_FOUND;
}
//Have we done this search before?
if(m_findText == text)
{
//Just do a highlight?
if((flags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT) != (m_findFlags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT))
{
m_findFlags = flags;
if(!m_findPointers.empty())
{
FindInternal(m_findText, m_findFlags, ((flags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT) == 0 ? wxWEB_VIEW_FIND_REMOVE_HIGHLIGHT : 0));
}
return m_findPosition;
}
else if(((m_findFlags & wxWEB_VIEW_FIND_ENTIRE_WORD) == (flags & wxWEB_VIEW_FIND_ENTIRE_WORD)) && ((m_findFlags & wxWEB_VIEW_FIND_MATCH_CASE) == (flags&wxWEB_VIEW_FIND_MATCH_CASE)))
{
m_findFlags = flags;
return FindNext(((flags & wxWEB_VIEW_FIND_BACKWARDS) ? -1 : 1));
}
}
//Remove old highlight if any.
if(m_findFlags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT)
{
FindInternal(m_findText, (m_findFlags &~ wxWEB_VIEW_FIND_HIGHLIGHT_RESULT), wxWEB_VIEW_FIND_REMOVE_HIGHLIGHT);
}
//Reset find variables.
FindClear();
ClearSelection();
m_findText = text;
m_findFlags = flags;
//find the text and return count.
FindInternal(text, flags, wxWEB_VIEW_FIND_ADD_POINTERS);
return m_findPointers.empty() ? wxNOT_FOUND : m_findPointers.size();
}
void wxWebViewIE::SetEditable(bool enable)
{
wxCOMPtr<IHTMLDocument2> document(GetDocument());
@@ -856,6 +911,232 @@ wxCOMPtr<IHTMLDocument2> wxWebViewIE::GetDocument() const
return document;
}
bool wxWebViewIE::IsElementVisible(IHTMLElement* elm)
{
IHTMLCurrentStyle* style;
IHTMLElement *elm1 = elm;
IHTMLElement2 *elm2;
BSTR tmp_bstr;
bool is_visible = true;
//This method is not perfect but it does discover most of the hidden elements.
//so if a better solution is found, then please do improve.
while(elm1)
{
if(SUCCEEDED(elm1->QueryInterface(IID_IHTMLElement2, (void**) &elm2)))
{
if(SUCCEEDED(elm2->get_currentStyle(&style)))
{
//Check if the object has the style display:none.
if((style->get_display(&tmp_bstr) != S_OK) ||
(tmp_bstr != NULL && (_wcsicmp(tmp_bstr, L"none") == 0)))
{
is_visible = false;
}
//Check if the object has the style visibility:hidden.
if(is_visible && (style->get_visibility(&tmp_bstr) != S_OK) ||
(tmp_bstr != NULL && _wcsicmp(tmp_bstr, L"hidden") == 0))
{
is_visible = false;
}
style->Release();
}
elm2->Release();
}
//Lets check the object's parent element.
IHTMLElement* parent;
if(is_visible && SUCCEEDED(elm1->get_parentElement(&parent)))
{
elm1->Release();
elm1 = parent;
}
else
{
elm1->Release();
break;
}
}
return is_visible;
}
void wxWebViewIE::FindInternal(const wxString& text, int flags, int internal_flag)
{
IMarkupServices *pIMS;
IMarkupContainer *pIMC;
IMarkupPointer *ptrBegin, *ptrEnd;
IHTMLElement* elm;
long find_flag = 0;
IHTMLDocument2 *document = GetDocument();
//This function does the acutal work.
if(SUCCEEDED(document->QueryInterface(IID_IMarkupServices, (void **)&pIMS)))
{
if(SUCCEEDED(document->QueryInterface(IID_IMarkupContainer, (void **)&pIMC)))
{
BSTR attr_bstr = SysAllocString(L"style=\"background-color:#ffff00\"");
BSTR text_bstr = SysAllocString(text.wc_str());
pIMS->CreateMarkupPointer(&ptrBegin);
pIMS->CreateMarkupPointer(&ptrEnd);
ptrBegin->SetGravity(POINTER_GRAVITY_Right);
ptrBegin->MoveToContainer(pIMC, TRUE);
//Create the find flag from the wx one.
if(flags & wxWEB_VIEW_FIND_ENTIRE_WORD)
{
find_flag |= FINDTEXT_WHOLEWORD;
}
if(flags & wxWEB_VIEW_FIND_MATCH_CASE)
{
find_flag |= FINDTEXT_MATCHCASE;
}
//A little speed-up to avoid to re-alloc in the positions vector.
if(text.Len() < 3 && m_findPointers.capacity() < 500)
{
m_findPointers.reserve(text.Len() == 1 ? 1000 : 500);
}
while(ptrBegin->FindText(text_bstr, find_flag, ptrEnd, NULL) == S_OK)
{
if(ptrBegin->CurrentScope(&elm) == S_OK)
{
if(IsElementVisible(elm))
{
//Highlight the word if the flag was set.
if(flags & wxWEB_VIEW_FIND_HIGHLIGHT_RESULT)
{
IHTMLElement* pFontEl;
pIMS->CreateElement(TAGID_FONT, attr_bstr, &pFontEl);
pIMS->InsertElement(pFontEl, ptrBegin, ptrEnd);
}
if(internal_flag & wxWEB_VIEW_FIND_REMOVE_HIGHLIGHT)
{
IHTMLElement* pFontEl;
ptrBegin->CurrentScope(&pFontEl);
pIMS->RemoveElement(pFontEl);
pFontEl->Release();
}
if(internal_flag & wxWEB_VIEW_FIND_ADD_POINTERS)
{
IMarkupPointer *cptrBegin, *cptrEnd;
pIMS->CreateMarkupPointer(&cptrBegin);
pIMS->CreateMarkupPointer(&cptrEnd);
cptrBegin->MoveToPointer(ptrBegin);
cptrEnd->MoveToPointer(ptrEnd);
m_findPointers.push_back(wxFindPointers(cptrBegin,cptrEnd));
}
}
elm->Release();
}
ptrBegin->MoveToPointer(ptrEnd);
}
//Clean up.
SysFreeString(text_bstr);
SysFreeString(attr_bstr);
pIMC->Release();
ptrBegin->Release();
ptrEnd->Release();
}
pIMS->Release();
}
document->Release();
}
long wxWebViewIE::FindNext(int direction)
{
//Don't bother if we have no pointers set.
if(m_findPointers.empty())
{
return wxNOT_FOUND;
}
//Manage the find position and do some checks.
if(direction > 0)
{
m_findPosition++;
}
else
{
m_findPosition--;
}
if(m_findPosition >= (signed)m_findPointers.size())
{
if(m_findFlags & wxWEB_VIEW_FIND_WRAP)
{
m_findPosition = 0;
}
else
{
m_findPosition--;
return wxNOT_FOUND;
}
}
else if(m_findPosition < 0)
{
if(m_findFlags & wxWEB_VIEW_FIND_WRAP)
{
m_findPosition = m_findPointers.size()-1;
}
else
{
m_findPosition++;
return wxNOT_FOUND;
}
}
//some variables to use later on.
IHTMLElement *body_element;
IHTMLBodyElement *body;
IHTMLTxtRange *range = NULL;
IMarkupServices *pIMS;
IHTMLDocument2 *document = GetDocument();
long ret = -1;
//Now try to create a range from the body.
if(SUCCEEDED(document->get_body(&body_element)))
{
if(SUCCEEDED(body_element->QueryInterface(IID_IHTMLBodyElement,(void**)&body)))
{
if(SUCCEEDED(body->createTextRange(&range)))
{
//So far so good, now we try to position our find pointers.
if(SUCCEEDED(document->QueryInterface(IID_IMarkupServices,(void **)&pIMS)))
{
IMarkupPointer *begin = m_findPointers[m_findPosition].begin, *end = m_findPointers[m_findPosition].end;
if(pIMS->MoveRangeToPointers(begin,end,range) == S_OK && range->select() == S_OK)
{
ret = m_findPosition;
}
pIMS->Release();
}
range->Release();
}
body->Release();
}
body_element->Release();
}
document->Release();
return ret;
}
void wxWebViewIE::FindClear()
{
//Reset find variables.
m_findText.Empty();
m_findFlags = wxWEB_VIEW_FIND_DEFAULT;
m_findPosition = -1;
//The m_findPointers contains pointers for the found text.
//Since it uses ref counting we call release on the pointers first
//before we remove them from the vector. In other words do not just
//remove elements from m_findPointers without calling release first
//or you will get a memory leak.
size_t count = m_findPointers.size();
for(size_t i = 0; i < count; i++)
{
m_findPointers[i].begin->Release();
m_findPointers[i].end->Release();
}
m_findPointers.clear();
}
bool wxWebViewIE::EnableControlFeature(long flag, bool enable)
{
#if wxUSE_DYNLIB_CLASS
@@ -989,6 +1270,8 @@ void wxWebViewIE::onActiveXEvent(wxActiveXEvent& evt)
}
//Reset as we are done now
m_historyLoadingFromList = false;
//Reset the find values.
FindClear();
// TODO: set target parameter if possible
wxString target = wxEmptyString;
wxWebViewEvent event(wxEVT_COMMAND_WEB_VIEW_LOADED, GetId(),