mirror of
https://github.com/makew0rld/amfora.git
synced 2024-12-04 14:46:29 -05:00
101 lines
2.8 KiB
Go
101 lines
2.8 KiB
Go
package display
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import (
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"errors"
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"net/url"
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"strings"
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"code.rocketnine.space/tslocum/cview"
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"github.com/spf13/viper"
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)
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// This file contains funcs that are small, self-contained utilities.
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// makeContentLayout returns a flex that contains the given TextView
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// along with the provided left margin, as well as a single empty
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// line at the top, for a top margin.
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func makeContentLayout(tv *cview.TextView, leftMargin int) *cview.Flex {
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// Create horizontal flex with the left margin as an empty space
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horiz := cview.NewFlex()
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horiz.SetDirection(cview.FlexColumn)
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if leftMargin > 0 {
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horiz.AddItem(nil, leftMargin, 0, false)
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}
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horiz.AddItem(tv, 0, 1, true)
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// Create a vertical flex with the other one and a top margin
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vert := cview.NewFlex()
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vert.SetDirection(cview.FlexRow)
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vert.AddItem(nil, 1, 0, false)
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vert.AddItem(horiz, 0, 1, true)
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return vert
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}
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// tabNumber gets the index of the tab in the tabs slice. It returns -1
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// if the tab is not in that slice.
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func tabNumber(t *tab) int {
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tempTabs := tabs
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for i := range tempTabs {
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if tempTabs[i] == t {
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return i
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}
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}
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return -1
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}
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// escapeMeta santizes a META string for use within a cview modal.
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func escapeMeta(meta string) string {
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return cview.Escape(strings.ReplaceAll(meta, "\n", ""))
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}
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// isValidTab indicates whether the passed tab is still being used, even if it's not currently displayed.
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func isValidTab(t *tab) bool {
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return tabNumber(t) != -1
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}
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func leftMargin() int {
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// Return the left margin size that centers the text, assuming it's the max width
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// https://github.com/makeworld-the-better-one/amfora/issues/233
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lm := (termW - viper.GetInt("a-general.max_width")) / 2
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if lm < 0 {
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return 0
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}
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return lm
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}
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func textWidth() int {
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if termW <= 0 {
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// This prevent a flash of 1-column text on startup, when the terminal
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// width hasn't been initialized.
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return viper.GetInt("a-general.max_width")
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}
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// Subtract left and right margin from total width to get text width
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// Left and right margin are equal because text is automatically centered, see:
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// https://github.com/makeworld-the-better-one/amfora/issues/233
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max := termW - leftMargin()*2
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if max < viper.GetInt("a-general.max_width") {
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return max
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}
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return viper.GetInt("a-general.max_width")
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}
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// resolveRelLink returns an absolute link for the given absolute link and relative one.
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// It also returns an error if it could not resolve the links, which should be displayed
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// to the user.
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func resolveRelLink(t *tab, prev, next string) (string, error) {
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if !t.hasContent() || t.isAnAboutPage() {
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return next, nil
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}
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prevParsed, _ := url.Parse(prev)
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nextParsed, err := url.Parse(next)
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if err != nil {
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return "", errors.New("link URL could not be parsed") //nolint:goerr113
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}
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return prevParsed.ResolveReference(nextParsed).String(), nil
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}
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