View class for source code. More...

#include <SourceView.h>

Inheritance diagram for SourceView:

Public Member Functions
	SourceView (ItemDataRole fileNameRole, ItemDataRole contentRole, ItemDataRole filePathRole)
	Constructor. More...

virtual	~SourceView ()
	Destructor. More...

bool	setIndex (const WModelIndex &index)
	Sets the model index. More...

virtual std::unique_ptr< WWidget >	renderView ()
	Returns the widget that renders the view. More...

Public Member Functions inherited from Wt::WViewWidget
	WViewWidget ()

void	update ()

virtual void	load () override

virtual void	render (WFlags< RenderFlag > flags) override

virtual void	refresh () override

Public Member Functions inherited from Wt::WWebWidget
	WWebWidget ()

virtual std::vector< WWidget * >	children () const override

Signal &	childrenChanged ()

virtual void	setPositionScheme (PositionScheme scheme) override

virtual PositionScheme	positionScheme () const override

virtual void	setOffsets (const WLength &offset, WFlags< Side > sides=AllSides) override

virtual WLength	offset (Side s) const override

virtual void	resize (const WLength &width, const WLength &height) override

virtual WLength	width () const override

virtual WLength	height () const override

virtual void	setMinimumSize (const WLength &width, const WLength &height) override

virtual WLength	minimumWidth () const override

virtual WLength	minimumHeight () const override

virtual void	setMaximumSize (const WLength &width, const WLength &height) override

virtual WLength	maximumWidth () const override

virtual WLength	maximumHeight () const override

virtual void	setLineHeight (const WLength &height) override

virtual WLength	lineHeight () const override

virtual void	setFloatSide (Side s) override

virtual Side	floatSide () const override

virtual void	setClearSides (WFlags< Side > sides) override

virtual WFlags< Side >	clearSides () const override

virtual void	setMargin (const WLength &margin, WFlags< Side > sides=AllSides) override

virtual WLength	margin (Side side) const override

virtual void	setHiddenKeepsGeometry (bool enabled) override

virtual bool	hiddenKeepsGeometry () const override

virtual void	setHidden (bool hidden, const WAnimation &animation=WAnimation()) override

virtual bool	isHidden () const override

virtual bool	isVisible () const override

virtual void	setDisabled (bool disabled) override

virtual bool	isDisabled () const override

virtual bool	isEnabled () const override

virtual void	setPopup (bool popup) override

virtual bool	isPopup () const override

virtual void	setInline (bool isInline) override

virtual bool	isInline () const override

virtual void	setDecorationStyle (const WCssDecorationStyle &style) override

virtual WCssDecorationStyle &	decorationStyle () override

virtual void	setStyleClass (const WString &styleClass) override

virtual WString	styleClass () const override

virtual void	addStyleClass (const WString &styleClass, bool force=false) override

virtual void	removeStyleClass (const WString &styleClass, bool force=false) override

virtual bool	hasStyleClass (const WString &styleClass) const override

virtual void	setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength()) override

virtual AlignmentFlag	verticalAlignment () const override

virtual WLength	verticalAlignmentLength () const override

virtual void	setToolTip (const WString &text, TextFormat textFormat=TextFormat::Plain) override

virtual void	setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override

virtual WString	toolTip () const override

virtual void	setAttributeValue (const std::string &name, const WString &value) override

virtual WString	attributeValue (const std::string &name) const override

virtual void	setJavaScriptMember (const std::string &name, const std::string &value) override

virtual std::string	javaScriptMember (const std::string &name) const override

virtual void	callJavaScriptMember (const std::string &name, const std::string &args) override

virtual bool	loaded () const override

virtual void	setId (const std::string &id) override

virtual WWidget *	find (const std::string &name) override

virtual WWidget *	findById (const std::string &id) override

virtual void	setSelectable (bool selectable) override

virtual void	doJavaScript (const std::string &javascript) override

virtual const std::string	id () const override

void	setLoadLaterWhenInvisible (bool)

std::string	htmlTagName () const

void	setHtmlTagName (const std::string &tag)

virtual void	setCanReceiveFocus (bool enabled) override

virtual bool	canReceiveFocus () const override

virtual bool	setFirstFocus () override

virtual void	setFocus (bool focus) override

virtual bool	hasFocus () const override

virtual void	setTabIndex (int index) override

virtual int	tabIndex () const override

EventSignal &	blurred ()

EventSignal &	focussed ()

virtual bool	scrollVisibilityEnabled () const final override

virtual void	setScrollVisibilityEnabled (bool enabled) final override

virtual int	scrollVisibilityMargin () const final override

virtual void	setScrollVisibilityMargin (int margin) final override

virtual Signal< bool > &	scrollVisibilityChanged () final override

virtual bool	isScrollVisible () const final override

virtual void	setThemeStyleEnabled (bool enabled) final override

virtual bool	isThemeStyleEnabled () const final override

virtual void	setObjectName (const std::string &name) override

void	setFocus ()

virtual void	setFocus (bool focus)=0

Public Member Functions inherited from Wt::WWidget
virtual	~WWidget ()

WWidget *	parent () const

virtual std::unique_ptr< WWidget >	removeWidget (WWidget *widget)

std::unique_ptr< Widget >	removeWidget (Widget *widget)

std::unique_ptr< WWidget >	removeFromParent ()

void	setWidth (const WLength &width)

void	setHeight (const WLength &height)

virtual void	positionAt (const WWidget *widget, Orientation orientation=Orientation::Vertical)

virtual void	toggleStyleClass (const WString &styleClass, bool add, bool force=false)

std::string	jsRef () const

void	setFocus ()

virtual void	acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())

virtual void	stopAcceptDrops (const std::string &mimeType)

virtual void	htmlText (std::ostream &out)

bool	isRendered () const

void	hide ()

void	animateHide (const WAnimation &animation)

void	show ()

void	animateShow (const WAnimation &animation)

void	enable ()

void	disable ()

bool	layoutSizeAware () const

Public Member Functions inherited from Wt::WObject
void	addChild (std::unique_ptr< WObject > child)

Child *	addChild (std::unique_ptr< Child > child)

std::unique_ptr< WObject >	removeChild (WObject *child)

std::unique_ptr< Child >	removeChild (Child *child)

virtual std::string	objectName () const

void	resetLearnedSlots ()

void	resetLearnedSlot (void(T::*method)())

WStatelessSlot *	implementStateless (void(T::*method)())

WStatelessSlot *	implementStateless (void(T::method)(), void(T::undoMethod)())

void	isNotStateless ()

WStatelessSlot *	implementJavaScript (void(T::*method)(), const std::string &jsCode)

Public Member Functions inherited from Wt::Core::observable
	observable () noexcept

virtual	~observable ()

auto	bindSafe (void(C::*method)(Args...)) noexcept

auto	bindSafe (void(C::*method)(Args...) const) const noexcept

auto	bindSafe (const Function &function) noexcept

Private Member Functions
std::string	imageExtension (const std::string &fileName)

Private Attributes
WModelIndex	index_
	The index that is currently displayed. More...

Wt::ItemDataRole	fileNameRole_
	The role that is currently displayed. More...

Wt::ItemDataRole	contentRole_

Wt::ItemDataRole	filePathRole_

std::shared_ptr< WMemoryResource >	imageResource_

Additional Inherited Members
Public Types inherited from Wt::WObject
typedef void(WObject::*	Method) ()

Static Public Member Functions inherited from Wt::WWebWidget
static std::string	jsStringLiteral (const std::string &v, char delimiter='\'')

Static Public Member Functions inherited from Wt::WWidget
static WString	tr (const char *key)

Protected Member Functions inherited from Wt::WWebWidget
virtual void	propagateSetEnabled (bool enabled) override

virtual void	enableAjax () override

virtual WStatelessSlot *	getStateless (Method method) override

Protected Member Functions inherited from Wt::WWidget
void	setLayoutSizeAware (bool sizeAware)

virtual void	layoutSizeChanged (int width, int height)

	WWidget ()

virtual void	dropEvent (WDropEvent dropEvent)

virtual int	boxPadding (Orientation orientation) const

virtual int	boxBorder (Orientation orientation) const

void	scheduleRender (WFlags< RepaintFlag > flags=None)

Detailed Description

View class for source code.

A view class is used so that no server-side memory is used while displaying a potentially large file.

Definition at line 28 of file SourceView.h.

Constructor & Destructor Documentation

◆ SourceView()

SourceView::SourceView	(	ItemDataRole	fileNameRole,
		ItemDataRole	contentRole,
		ItemDataRole	filePathRole
	)

Constructor.

The fileNameRole will be used to retrieve data from a file to be displayed. If no data is set for this role, then contentRole should hold the data as a string.

Definition at line 20 of file SourceView.C.

     : fileNameRole_(fileNameRole),
       contentRole_(contentRole),
       filePathRole_(filePathRole),
       imageResource_(0)
 {}

◆ ~SourceView()

SourceView::~SourceView ( )

virtual

Destructor.

Definition at line 29 of file SourceView.C.

30 { }

Member Function Documentation

◆ imageExtension()

std::string SourceView::imageExtension ( const std::string & fileName )

private

Definition at line 203 of file SourceView.C.

 {
   static const char *imageExtensions[] = {
     ".png", ".gif", ".jpg", "jpeg", ".ico", 0
   };
  
   fs::path p(fileName);
   std::string extension = fs::extension(p);
  
   for (const char **s = imageExtensions; *s != 0; ++s)
     if (*s == extension)
       return extension.substr(1);
  
   return std::string();
 }

◆ renderView()

std::unique_ptr< WWidget > SourceView::renderView ( )

virtual

Returns the widget that renders the view.

Returns he view contents: renders the file to a WText widget. WViewWidget deletes this widget after every rendering step.

Implements Wt::WViewWidget.

Definition at line 97 of file SourceView.C.

 {
   if (!index_.isValid()) {
     // no content
     auto result = std::make_unique<WText>();
     result->setInline(false);
     return std::move(result);
   }
  
   /*
    * read the contents, from string or file name
    */
   cpp17::any contentsData = index_.data(contentRole_);
   std::string content;
   if (cpp17::any_has_value(contentsData))
    content = asString(contentsData).toUTF8();
   cpp17::any fileNameData = index_.data(fileNameRole_);
   std::string fileName =
     asString(fileNameData).toUTF8();
   cpp17::any filePathData = index_.data(filePathRole_);
   std::string filePath;
   if (cpp17::any_has_value(filePathData))
     filePath = asString(filePathData).toUTF8();
  
   /*
    * determine source language, for source highlight
    */
   std::string lang = getLanguageFromFileExtension(fileName);
   if (content != "" && content.substr(0, 100).find("-*- C++ -*-")
       != std::string::npos)
     lang = "cpp";
  
   std::string outputFileName;
  
   if (lang != "") {
     std::string inputFileName;
  
     if (cpp17::any_has_value(filePathData))
       inputFileName = filePath;
     else {
       inputFileName = tempFileName();
       std::ofstream out(inputFileName.c_str(),
                         std::ios::out | std::ios::binary);
       out.write(content.c_str(), (std::streamsize)content.length());
       out.close();
     }
  
     outputFileName = tempFileName();
  
     std::string sourceHighlightCommand = "source-highlight ";
     sourceHighlightCommand += "--src-lang=" + lang + " ";
     sourceHighlightCommand += "--out-format=xhtml ";
     sourceHighlightCommand += "--input=" + inputFileName + " ";
     sourceHighlightCommand += "--output=" + outputFileName + " ";
  
     std::cerr << sourceHighlightCommand << std::endl;
     bool sourceHighlightOk = system(sourceHighlightCommand.c_str()) == 0;
  
     if (sourceHighlightOk)
       content = readFileToString(outputFileName);
     else {
       content = readFileToString(inputFileName);
       lang = "";
     }
     unlink(outputFileName.c_str());
  
     if (!cpp17::any_has_value(filePathData))
       unlink(inputFileName.c_str());
   }
  
   if (content == "")
     // do not load binary files, we would need to perform proper UTF-8
     // transcoding to display them
     if (!boost::iends_with(fileName, ".jar")
         && !boost::iends_with(fileName, ".war")
         && !boost::iends_with(fileName, ".class"))
       content = readFileToString(fileName);
  
   std::unique_ptr<WWidget> result;
  
   if (!imageExtension(fileName).empty()) {
     std::unique_ptr<WImage> image(std::make_unique<WImage>());
     imageResource_ = std::make_shared<WMemoryResource>();
     imageResource_->setMimeType("mime/" + imageExtension(fileName));
     imageResource_->setData((const unsigned char*)content.data(),
                             (int)content.length());
     image->setImageLink(WLink(imageResource_));
     result = std::move(image);
   } else if (lang != "") {
     auto text = std::make_unique<WText>();
     text->setTextFormat(TextFormat::UnsafeXHTML);
     text->setText(content);
     result = std::move(text);
   } else {
     auto text = std::make_unique<WText>();
     text->setTextFormat(TextFormat::Plain);
     text->setText(content);
     result = std::move(text);
   }
  
   result->setInline(false);
   WApplication::instance()
     ->doJavaScript(result->jsRef() + ".parentNode.scrollTop = 0;");
   return std::move(result);
 }

◆ setIndex()

bool SourceView::setIndex ( const WModelIndex & index )

Sets the model index.

Returns true whether the view will be rerendered. The view will only be rerendered if the index contains new data.

Definition at line 32 of file SourceView.C.

 {
   if (index != index_ && index.isValid()) {
     std::string fp = !cpp17::any_has_value(index.data(filePathRole_)) ? std::string()
       : asString(index.data(filePathRole_)).toUTF8();
  
     if (cpp17::any_has_value(index.data(contentRole_))
         || (!fp.empty() && !fs::is_directory(fp))) {
       index_ = index;
       update();
  
       return true;
     }
   }
  
   return false;
 }

Member Data Documentation

◆ contentRole_

Wt::ItemDataRole SourceView::contentRole_

private

Definition at line 65 of file SourceView.h.

◆ fileNameRole_

Wt::ItemDataRole SourceView::fileNameRole_

private

The role that is currently displayed.

Definition at line 64 of file SourceView.h.

◆ filePathRole_

Wt::ItemDataRole SourceView::filePathRole_

private

Definition at line 66 of file SourceView.h.

◆ imageResource_

std::shared_ptr<WMemoryResource> SourceView::imageResource_

private

Definition at line 68 of file SourceView.h.

◆ index_

WModelIndex SourceView::index_

private

The index that is currently displayed.

Definition at line 61 of file SourceView.h.

The documentation for this class was generated from the following files:

wt-homepage/SourceView.h
wt-homepage/SourceView.C

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SourceView()

◆ ~SourceView()

Member Function Documentation

◆ imageExtension()

◆ renderView()

◆ setIndex()

Member Data Documentation

◆ contentRole_

◆ fileNameRole_

◆ filePathRole_

◆ imageResource_

◆ index_