go/src/cmd/cover/html.go

// htmlOutput reads the profile data from profile and generates an HTML
// coverage report, writing it to outfile. If outfile is empty,
// it writes the report to a temporary file and opens it in a web browser.
func htmlOutput(profile, outfile string) error { … }

// percentCovered returns, as a percentage, the fraction of the statements in
// the profile covered by the test run.
// In effect, it reports the coverage of a given source file.
func percentCovered(p *cover.Profile) float64 { … }

// htmlGen generates an HTML coverage report with the provided filename,
// source code, and tokens, and writes it to the given Writer.
func htmlGen(w io.Writer, src []byte, boundaries []cover.Boundary) error { … }

// rgb returns an rgb value for the specified coverage value
// between 0 (no coverage) and 10 (max coverage).
func rgb(n int) string { … }

// colors generates the CSS rules for coverage colors.
func colors() template.CSS { … }

var htmlTemplate …

type templateData …

// PackageName returns a name for the package being shown.
// It does this by choosing the penultimate element of the path
// name, so foo.bar/baz/foo.go chooses 'baz'. This is cheap
// and easy, avoids parsing the Go file, and gets a better answer
// for package main. It returns the empty string if there is
// a problem.
func (td templateData) PackageName() string { … }

type templateFile …

const tmplHTML …