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✨ Change how wrapping works - fixes #32 fixes #35

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This commit is contained in:
makeworld 2020-07-03 14:02:33 -04:00
parent 36c2206785
commit 6a708d339d
2 changed files with 81 additions and 66 deletions
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4
CHANGELOG.md
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@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Added
- Link and heading lines are wrapped just like regular text lines
- Wrapped list items are indented to stay behind the bullet (#35)
### Changed
- Pages are rewrapped dynamically, whenever the terminal size changes (#33)

139
renderer/renderer.go
View File

@ -13,6 +13,38 @@ import (
"gitlab.com/tslocum/cview"
)
// wrapLine wraps a line to the provided width, and adds the provided prefix and suffix to each wrapped line.
// It recovers from wrapping panics and should never cause a panic.
// It returns a slice of lines, without newlines at the end.
//
// 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 {
// Anonymous function to allow recovery from potential WordWrap panic
var ret []string
func() {
defer func() {
if r := recover(); r != nil {
// Use unwrapped line instead
if includeFirst {
ret = []string{prefix + line + suffix}
} else {
ret = []string{line}
}
}
}()
wrapped := cview.WordWrap(line, width)
for i := range wrapped {
if !includeFirst && i == 0 {
continue
}
wrapped[i] = prefix + wrapped[i] + suffix
}
ret = wrapped
}()
return ret
}
// convertRegularGemini converts non-preformatted blocks of text/gemini
// into a cview-compatible format.
// It also returns a slice of link URLs.
@ -33,25 +65,15 @@ func convertRegularGemini(s string, numLinks, width int) (string, []string) {
// Headings
if viper.GetBool("a-general.color") {
if strings.HasPrefix(lines[i], "###") {
lines[i] = "[fuchsia::b]" + lines[i] + "[-::-]"
}
if strings.HasPrefix(lines[i], "##") {
lines[i] = "[lime::b]" + lines[i] + "[-::-]"
}
if strings.HasPrefix(lines[i], "#") {
lines[i] = "[red::b]" + lines[i] + "[-::-]"
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "[fuchsia::b]", "[-::-]", true)...)
} else if strings.HasPrefix(lines[i], "##") {
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "[lime::b]", "[-::-]", true)...)
} else if strings.HasPrefix(lines[i], "#") {
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "[red::b]", "[-::-]", true)...)
}
} else {
// Just bold, no colors
if strings.HasPrefix(lines[i], "###") {
lines[i] = "[::b]" + lines[i] + "[::-]"
}
if strings.HasPrefix(lines[i], "##") {
lines[i] = "[::b]" + lines[i] + "[::-]"
}
if strings.HasPrefix(lines[i], "#") {
lines[i] = "[::b]" + lines[i] + "[::-]"
}
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "[::b]", "[-::-]", true)...)
}
// Links
@ -82,78 +104,67 @@ func convertRegularGemini(s string, numLinks, width int) (string, []string) {
links = append(links, url)
// Wrap and add link text
// Wrap the link text, but add some spaces to indent the wrapped lines past the link number
wrappedLink := wrapLine(linkText, width,
strings.Repeat(" ", len(strconv.Itoa(numLinks+len(links)))+4), // +4 for spaces and brackets
"",
false, // Don't indent the first line, it's the one with link number
)
// Set the style tags
// Add them to the first line
if viper.GetBool("a-general.color") {
pU, err := urlPkg.Parse(url)
if err == nil && (pU.Scheme == "" || pU.Scheme == "gemini" || pU.Scheme == "about") {
// A gemini link
// Add the link text in blue (in a region), and a gray link number to the left of it
lines[i] = `[silver::b][` + strconv.Itoa(numLinks+len(links)) + "[]" + "[-::-] " +
`[dodgerblue]["` + strconv.Itoa(numLinks+len(links)-1) + `"]` + linkText + `[""][-]`
wrappedLink[0] = `[silver::b][` + strconv.Itoa(numLinks+len(links)) + "[]" + "[-::-] " +
`[dodgerblue]["` + strconv.Itoa(numLinks+len(links)-1) + `"]` +
wrappedLink[0]
} else {
// Not a gemini link, use purple instead
lines[i] = `[silver::b][` + strconv.Itoa(numLinks+len(links)) + "[]" + "[-::-] " +
`[#8700d7]["` + strconv.Itoa(numLinks+len(links)-1) + `"]` + linkText + `[""][-]`
wrappedLink[0] = `[silver::b][` + strconv.Itoa(numLinks+len(links)) + "[]" + "[-::-] " +
`[#8700d7]["` + strconv.Itoa(numLinks+len(links)-1) + `"]` +
wrappedLink[0]
}
} else {
// No colours allowed
lines[i] = `[::b][` + strconv.Itoa(numLinks+len(links)) + "[][::-] " +
`["` + strconv.Itoa(numLinks+len(links)-1) + `"]` + linkText + `[""]`
wrappedLink[0] = `[::b][` + strconv.Itoa(numLinks+len(links)) + "[][::-] " +
`["` + strconv.Itoa(numLinks+len(links)-1) + `"]` +
wrappedLink[0]
}
wrappedLink[len(wrappedLink)-1] += `[""][-]` // Close region and formatting at the end
wrappedLines = append(wrappedLines, wrappedLink...)
// Lists
} else if strings.HasPrefix(lines[i], "* ") {
if viper.GetBool("a-general.bullets") {
lines[i] = " \u2022" + lines[i][1:]
// Wrap list item, and indent wrapped lines past the bullet
wrappedItem := wrapLine(lines[i][1:], width, " ", "", false)
// Add bullet
wrappedItem[0] = " \u2022" + wrappedItem[0]
wrappedLines = append(wrappedLines, wrappedItem...)
}
// Optionally list lines could be colored here too, if color is enabled
}
// Final processing of each line: wrapping
if strings.TrimSpace(lines[i]) == "" {
// Just add empty line without processing
wrappedLines = append(wrappedLines, "")
} else {
if (strings.HasPrefix(lines[i], "[silver::b]") && viper.GetBool("a-general.color")) || strings.HasPrefix(lines[i], "[::b]") {
// It's a link line, so don't wrap it
wrappedLines = append(wrappedLines, lines[i])
} else if strings.HasPrefix(lines[i], ">") {
// It's a quote line, add extra quote symbols to the start of each wrapped line
// It's a quote line, add extra quote symbols and italics to the start of each wrapped line
// Remove beginning quote and maybe space
lines[i] = strings.TrimPrefix(lines[i], ">")
lines[i] = strings.TrimPrefix(lines[i], " ")
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "> [::i]", "[::-]", true)...)
// Text is also made italic, lower down in code
// Anonymous function to allow recovery from potential WordWrap panic
func() {
defer func() {
if r := recover(); r != nil {
// Add unwrapped line instead
wrappedLines = append(wrappedLines, "> [::i]"+lines[i]+"[::-]")
}
}()
temp := cview.WordWrap(lines[i], width)
for i := range temp {
temp[i] = "> [::i]" + temp[i] + "[::-]"
}
wrappedLines = append(wrappedLines, temp...)
}()
} else if strings.TrimSpace(lines[i]) == "" {
// Just add empty line without processing
wrappedLines = append(wrappedLines, "")
} else {
// Anonymous function to allow recovery from potential WordWrap panic
func() {
defer func() {
if r := recover(); r != nil {
// Add unwrapped line instead
wrappedLines = append(wrappedLines, lines[i])
}
}()
wrappedLines = append(wrappedLines, cview.WordWrap(lines[i], width)...)
}()
}
// Regular line, just wrap it
wrappedLines = append(wrappedLines, wrapLine(lines[i], width, "", "", true)...)
}
}