Add filetype as an option

Still in progress

cmd/micro/buffer.go

@@ -39,8 +39,6 @@ type Buffer struct {
 
 	// Syntax highlighting rules
 	rules []SyntaxRule
-	// The buffer's filetype
-	FileType string
 
 	// Buffer local settings
 	Settings map[string]interface{}
@@ -78,6 +76,7 @@ func NewBuffer(txt []byte, path string) *Buffer {
 	b.EventHandler = NewEventHandler(b)
 
 	b.Update()
+	b.FindFileType()
 	b.UpdateRules()
 
 	if _, err := os.Stat(configDir + "/buffers/"); os.IsNotExist(err) {
@@ -134,7 +133,17 @@ func NewBuffer(txt []byte, path string) *Buffer {
 // UpdateRules updates the syntax rules and filetype for this buffer
 // This is called when the colorscheme changes
 func (b *Buffer) UpdateRules() {
-	b.rules, b.FileType = GetRules(b)
+	b.rules = GetRules(b)
+}
+
+// FindFileType identifies this buffer's filetype based on the extension or header
+func (b *Buffer) FindFileType() {
+	b.Settings["filetype"] = FindFileType(b)
+}
+
+// FileType returns the buffer's filetype
+func (b *Buffer) FileType() string {
+	return b.Settings["filetype"].(string)
 }
 
 // CheckModTime makes sure that the file this buffer points to hasn't been updated

cmd/micro/highlighter.go

@@ -389,19 +389,29 @@ func LoadRulesFromFile(text, filename string) []SyntaxRule {
 	return rules
 }
 
-// GetRules finds the syntax rules that should be used for the buffer
-// and returns them. It also returns the filetype of the file
-func GetRules(buf *Buffer) ([]SyntaxRule, string) {
+// FindFileType finds the filetype for the given buffer
+func FindFileType(buf *Buffer) string {
 	for r := range syntaxFiles {
 		if r[0] != nil && r[0].MatchString(buf.Path) {
-			// Check if the syntax statement matches the extension
-			return LoadRulesFromFile(syntaxFiles[r].text, syntaxFiles[r].filename), syntaxFiles[r].filetype
+			// The syntax statement matches the extension
+			return syntaxFiles[r].filetype
 		} else if r[1] != nil && r[1].MatchString(buf.Line(0)) {
-			// Check if the header statement matches the first line
-			return LoadRulesFromFile(syntaxFiles[r].text, syntaxFiles[r].filename), syntaxFiles[r].filetype
+			// The header statement matches the first line
+			return syntaxFiles[r].filetype
 		}
 	}
-	return nil, "Unknown"
+	return "Unknown"
+}
+
+// GetRules finds the syntax rules that should be used for the buffer
+// and returns them. It also returns the filetype of the file
+func GetRules(buf *Buffer) []SyntaxRule {
+	for r := range syntaxFiles {
+		if syntaxFiles[r].filetype == buf.FileType() {
+			return LoadRulesFromFile(syntaxFiles[r].text, syntaxFiles[r].filename)
+		}
+	}
+	return nil
 }
 
 // SyntaxMatches is an alias to a map from character numbers to styles,
@@ -425,7 +435,7 @@ func Match(v *View) SyntaxMatches {
 
 	for i, line := range lines {
 		matches[i] = make([]tcell.Style, len(line)+1)
-		for j, _ := range matches[i] {
+		for j := range matches[i] {
 			matches[i][j] = defStyle
 		}
 	}

cmd/micro/settings.go

@@ -86,6 +86,7 @@ func DefaultSettings() map[string]interface{} {
 		"autoindent":   true,
 		"colorscheme":  "monokai",
 		"cursorline":   false,
+		"filetype":     "Unknown",
 		"ignorecase":   false,
 		"indentchar":   " ",
 		"ruler":        true,

cmd/micro/statusline.go

@@ -34,7 +34,7 @@ func (sline *Statusline) Display() {
 	file += " (" + lineNum + "," + columnNum + ")"
 
 	// Add the filetype
-	file += " " + sline.view.Buf.FileType
+	file += " " + sline.view.Buf.FileType()
 
 	rightText := helpBinding + " for help "
 	if sline.view.Help {