ui: clickable file scope

* When content that is shown in a snippet is located in the file scope, the snippet's title bar displays the file's name. Clicking this name has the same effect as maximizing the file (the file's entire content is shown but the file symbol is not activated).

src/app/qt/element/QtCodeSnippet.cpp

@@ -4,6 +4,7 @@
 #include <QPushButton>
 
 #include "utility/messaging/type/MessageShowScope.h"
+#include "utility/messaging/type/MessageShowFile.h"
 #include "utility/text/TextAccess.h"
 
 #include "data/location/TokenLocationFile.h"
@@ -40,7 +41,7 @@ std::shared_ptr<QtCodeSnippet> QtCodeSnippet::merged(QtCodeSnippet* a, QtCodeSni
 		code += line;
 	}
 
-	std::string title = first->m_title ? first->m_title->text().toStdString() : "";
+	std::string title = first->m_titleString;
 
 	return std::shared_ptr<QtCodeSnippet>(new QtCodeSnippet(
 		first->getStartLineNumber(),
@@ -62,6 +63,7 @@ QtCodeSnippet::QtCodeSnippet(
 )
 	: QFrame(file)
 	, m_titleId(titleId)
+	, m_titleString(title)
 	, m_dots(nullptr)
 	, m_title(nullptr)
 	, m_codeArea(std::make_shared<QtCodeArea>(startLineNumber, code, locationFile, file, this))
@@ -74,7 +76,7 @@ QtCodeSnippet::QtCodeSnippet(
 	layout->setAlignment(Qt::AlignTop);
 	setLayout(layout);
 
-	if (title.size())
+	if (m_titleString.size())
 	{
 		QHBoxLayout* titleLayout = new QHBoxLayout();
 		titleLayout->setMargin(0);
@@ -87,7 +89,7 @@ QtCodeSnippet::QtCodeSnippet(
 		m_dots->setAttribute(Qt::WA_LayoutUsesWidgetRect); // fixes layouting on Mac
 		titleLayout->addWidget(m_dots);
 
-		m_title = new QPushButton(title.c_str(), this);
+		m_title = new QPushButton(FilePath(m_titleString).fileName().c_str(), this);
 		m_title->setObjectName("scope_name");
 		m_title->minimumSizeHint(); // force font loading
 		m_title->setAttribute(Qt::WA_LayoutUsesWidgetRect); // fixes layouting on Mac
@@ -139,10 +141,14 @@ bool QtCodeSnippet::isActive() const
 
 void QtCodeSnippet::clickedTitle()
 {
-	if (m_titleId)
+	if (m_titleId > 0)
 	{
 		MessageShowScope(m_titleId).dispatch();
 	}
+	else
+	{
+		MessageShowFile(FilePath(m_titleString), 0, 0).dispatch();
+	}
 }
 
 void QtCodeSnippet::updateDots()

src/app/qt/element/QtCodeSnippet.h

@@ -49,6 +49,7 @@ private:
 	void updateDots();
 
 	Id m_titleId;
+	std::string m_titleString;
 
 	QPushButton* m_dots;
 	QPushButton* m_title;

src/lib/component/controller/CodeController.cpp

@@ -260,7 +260,6 @@ std::vector<CodeView::CodeSnippetParams> CodeController::getSnippetsForFile(std:
 		params.startLineNumber = std::max<int>(1, range.start.row - (range.start.strong ? 0 : snippetExpandRange));
 		params.endLineNumber = std::min<int>(textAccess->getLineCount(), range.end.row + (range.end.strong ? 0 : snippetExpandRange));
 
-
 		std::shared_ptr<TokenLocationFile> tempFile =
 			m_storageAccess->getTokenLocationsForLinesInFile(file->getFilePath().str(), params.startLineNumber, params.endLineNumber);
 		TokenLocationLine* firstUsedLine = nullptr;
@@ -269,9 +268,12 @@ std::vector<CodeView::CodeSnippetParams> CodeController::getSnippetsForFile(std:
 			firstUsedLine = tempFile->findTokenLocationLineByNumber(i);
 		}
 
+		params.titleId = 0;
 		if (firstUsedLine && firstUsedLine->getTokenLocations().size())
 		{
-			m_storageAccess->getTokenLocationOfParentScope(firstUsedLine->getTokenLocations().begin()->second.get())->forEachStartTokenLocation(
+			m_storageAccess->getTokenLocationOfParentScope(
+				firstUsedLine->getTokenLocations().begin()->second.get()
+			)->forEachStartTokenLocation( // this TokenLocationFile only contains a single StartTokenLocation.
 				[&](TokenLocation* location)
 				{
 					params.title = m_storageAccess->getNameHierarchyForNodeWithId(location->getTokenId()).getFullName();
@@ -279,6 +281,10 @@ std::vector<CodeView::CodeSnippetParams> CodeController::getSnippetsForFile(std:
 				}
 			);
 		}
+		if (!file->isWholeCopy && params.titleId == 0)
+		{
+			params.title = file->getFilePath().str();
+		}
 
 		for (const std::string& line: textAccess->getLines(params.startLineNumber, params.endLineNumber))
 		{