Prevent link lines (and other types) from being wider than the `max_width` setting

Fixes #280

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - Modal can't be closed when opening non-gemini text URLs from the commandline (#283, #284)
 - External programs started by Amfora remain as zombie processes (#219)
+- Prevent link lines (and other types) from being wider than the `max_width` setting (#280)
 
 
 ## [1.9.2] - 2021-12-10

renderer/renderer.go

@@ -58,6 +58,10 @@ func RenderPlainText(s string) string {
 //
 // Set includeFirst to true if the prefix and suffix should be applied to the first wrapped line as well
 func wrapLine(line string, width int, prefix, suffix string, includeFirst bool) []string {
+	if width < 1 {
+		width = 1
+	}
+
 	// Anonymous function to allow recovery from potential WordWrap panic
 	var ret []string
 	func() {
@@ -196,7 +200,7 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 					// Add the link text in blue (in a region), and a gray link number to the left of it
 					// Those are the default colors, anyway
 
-					wrappedLink = wrapLine(linkText, width,
+					wrappedLink = wrapLine(linkText, width-indent,
 						strings.Repeat(" ", indent)+
 							`["`+strconv.Itoa(num-1)+`"][`+config.GetColorString("amfora_link")+`]`,
 						`[-][""]`,
@@ -211,8 +215,8 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 				} else {
 					// No color
 
-					wrappedLink = wrapLine(linkText, width,
+					wrappedLink = wrapLine(linkText, width-indent,
-						strings.Repeat(" ", len(strconv.Itoa(num))+4)+ // +4 for spaces and brackets
+						strings.Repeat(" ", indent)+ // +4 for spaces and brackets
 							`["`+strconv.Itoa(num-1)+`"]`,
 						`[""]`,
 						false, // Don't indent the first line, it's the one with link number
@@ -228,7 +232,7 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 				if viper.GetBool("a-general.color") {
 					// Color
 
-					wrappedLink = wrapLine(linkText, width,
+					wrappedLink = wrapLine(linkText, width-indent,
 						strings.Repeat(" ", indent)+
 							`["`+strconv.Itoa(num-1)+`"]`+linkTag,
 						`[-::-][""]`,
@@ -242,7 +246,7 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 				} else {
 					// No color
 
-					wrappedLink = wrapLine(linkText, width,
+					wrappedLink = wrapLine(linkText, width-indent,
 						strings.Repeat(" ", indent)+
 							`["`+strconv.Itoa(num-1)+`"]`,
 						`[::-][""]`,
@@ -261,7 +265,8 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 		} else if strings.HasPrefix(lines[i], "* ") {
 			if viper.GetBool("a-general.bullets") {
 				// Wrap list item, and indent wrapped lines past the bullet
-				wrappedItem := wrapLine(lines[i][1:], width,
+				wrappedItem := wrapLine(lines[i][1:],
+					width-4, // Subtract the 4 indent spaces
 					fmt.Sprintf("    [%s]", config.GetColorString("list_text")),
 					"[-]", false)
 				// Add bullet
@@ -269,7 +274,8 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 					wrappedItem[0] + "[-]"
 				wrappedLines = append(wrappedLines, wrappedItem...)
 			} else {
-				wrappedItem := wrapLine(lines[i][1:], width,
+				wrappedItem := wrapLine(lines[i][1:],
+					width-4, // Subtract the 4 indent spaces
 					fmt.Sprintf("    [%s]", config.GetColorString("list_text")),
 					"[-]", false)
 				// Add "*"
@@ -290,7 +296,9 @@ func convertRegularGemini(s string, numLinks, width int, proxied bool) (string,
 				lines[i] = strings.TrimPrefix(lines[i], ">")
 				lines[i] = strings.TrimPrefix(lines[i], " ")
 				wrappedLines = append(wrappedLines,
-					wrapLine(lines[i], width, fmt.Sprintf("[%s::i]> ", config.GetColorString("quote_text")),
+					wrapLine(lines[i],
+						width-2, // Subtract 2 for width of prefix string
+						fmt.Sprintf("[%s::i]> ", config.GetColorString("quote_text")),
 						"[-::-]", true)...,
 				)
 			}