From 7a5c487632633ab89171d0fed257e7043def401d Mon Sep 17 00:00:00 2001
From: x1unix <denis0051@gmail.com>
Date: Tue, 21 Jan 2020 16:10:19 +0200
Subject: [PATCH 1/2] analyzer: parse doc comments

---
 pkg/analyzer/scanner.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/analyzer/scanner.go b/pkg/analyzer/scanner.go
index ba206eac..e2949fdf 100644
--- a/pkg/analyzer/scanner.go
+++ b/pkg/analyzer/scanner.go
@@ -79,7 +79,7 @@ func (p *PackageScanner) appendFunc(fn *ast.FuncDecl, dest *SymbolIndex) {
 func (p *PackageScanner) Scan() (PackageSummary, error) {
 	sum := NewPackageSummary()
 	set := token.NewFileSet()
-	packs, err := parser.ParseDir(set, p.path, nil, 0)
+	packs, err := parser.ParseDir(set, p.path, nil, parser.ParseComments)
 	if err != nil {
 		return sum, err
 	}

From a10c7d3bf126b5781244be334c7067ad530999b6 Mon Sep 17 00:00:00 2001
From: x1unix <denis0051@gmail.com>
Date: Tue, 21 Jan 2020 17:35:17 +0200
Subject: [PATCH 2/2] analyzer: format inner source code in godoc

---
 pkg/analyzer/decl.go       |  2 +-
 pkg/analyzer/docfmt.go     | 79 ++++++++++++++++++++++++++++++++++++++
 web/src/editor/provider.ts | 38 +++++++++---------
 3 files changed, 99 insertions(+), 20 deletions(-)
 create mode 100644 pkg/analyzer/docfmt.go

diff --git a/pkg/analyzer/decl.go b/pkg/analyzer/decl.go
index 0b314a02..d70d1cdd 100644
--- a/pkg/analyzer/decl.go
+++ b/pkg/analyzer/decl.go
@@ -81,7 +81,7 @@ func funcToItem(fn *ast.FuncDecl) *CompletionItem {
 	ci := &CompletionItem{
 		Label:         fn.Name.String(),
 		Kind:          Function,
-		Documentation: fn.Doc.Text(),
+		Documentation: formatDoc(fn.Doc.Text()),
 	}
 
 	ci.Detail = funcToString(fn.Type)
diff --git a/pkg/analyzer/docfmt.go b/pkg/analyzer/docfmt.go
new file mode 100644
index 00000000..cf5c8469
--- /dev/null
+++ b/pkg/analyzer/docfmt.go
@@ -0,0 +1,79 @@
+package analyzer
+
+import "strings"
+
+const (
+	newLineChar = '\n'
+	tabChar     = '\t'
+)
+
+var (
+	mdCodeTag     = []byte("```\n")
+	spaceIdent    = "  "
+	spaceIdentLen = len(spaceIdent)
+)
+
+func isDocLine(line string) bool {
+	// Source code in Go usually doc starts with tab char
+	if line[0] == tabChar {
+		return true
+	}
+
+	// Workaround for some packages with double space as doc indent (line "net/http")
+	if (len(line) > spaceIdentLen) && (line[:spaceIdentLen] == spaceIdent) {
+		return true
+	}
+
+	return false
+}
+
+func formatDoc(str string) MarkdownString {
+	if str == "" {
+		return MarkdownString{Value: str}
+	}
+
+	w := strings.Builder{}
+	docStart := false
+
+	lines := strings.Split(str, "\n")
+	for _, line := range lines {
+		if len(line) == 0 {
+			w.WriteRune(newLineChar)
+			continue
+		}
+
+		// Source code in Go doc starts with tab char
+		if isDocLine(line) {
+			if !docStart {
+				// Put markdown code section
+				// if we met first source code line
+				docStart = true
+				w.Write(mdCodeTag)
+			}
+
+			w.WriteString(line)
+			w.WriteRune(newLineChar)
+			continue
+		}
+
+		// Else - regular text
+		if docStart {
+			// Terminate code block if previous
+			// was open and not terminated
+			docStart = false
+			w.Write(mdCodeTag)
+		}
+
+		w.WriteString(line)
+		w.WriteRune(newLineChar)
+	}
+
+	if docStart {
+		// close markdown code block if wasn't closed
+		w.Write(mdCodeTag)
+	}
+
+	return MarkdownString{
+		Value: w.String(),
+	}
+}
diff --git a/web/src/editor/provider.ts b/web/src/editor/provider.ts
index b882168b..6c59e81e 100644
--- a/web/src/editor/provider.ts
+++ b/web/src/editor/provider.ts
@@ -15,28 +15,28 @@ const COMPL_REGEXP = /([a-zA-Z0-9_]+)(\.([A-Za-z0-9_]+))?$/;
 const R_GROUP_PKG = 1;
 const R_GROUP_METHOD = 3;
 
-class GoCompletionItemProvider implements monaco.languages.CompletionItemProvider {
-    constructor(private client: IAPIClient) {}
+const parseExpression = (expr: string) => {
+    COMPL_REGEXP.lastIndex = 0; // Reset regex state
+    const m = COMPL_REGEXP.exec(expr);
+    if (!m) {
+        return null;
+    }
 
-    private parseExpression(expr: string) {
-        COMPL_REGEXP.lastIndex = 0; // Reset regex state
-        const m = COMPL_REGEXP.exec(expr);
-        if (!m) {
-            return null;
-        }
+    const varName = m[R_GROUP_PKG];
+    const propValue = m[R_GROUP_METHOD];
 
-        const varName = m[R_GROUP_PKG];
-        const propValue = m[R_GROUP_METHOD];
+    if (!propValue) {
+        return {value: varName};
+    }
 
-        if (!propValue) {
-            return {value: varName};
-        }
+    return {
+        packageName: varName,
+        value: propValue
+    };
+};
 
-        return {
-            packageName: varName,
-            value: propValue
-        };
-    }
+class GoCompletionItemProvider implements monaco.languages.CompletionItemProvider {
+    constructor(private client: IAPIClient) {}
 
     async provideCompletionItems(model: ITextModel, position: Position, context: CompletionContext, token: CancellationToken): Promise<CompletionList> {
         const val = model.getValueInRange({
@@ -46,7 +46,7 @@ class GoCompletionItemProvider implements monaco.languages.CompletionItemProvide
             endColumn: position.column,
         }).trim();
 
-        const query = this.parseExpression(val);
+        const query = parseExpression(val);
         if (!query) {
             return Promise.resolve({suggestions: []});
         }