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227 lines
8.0 KiB
227 lines
8.0 KiB
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package templates
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import (
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"context"
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"encoding/hex"
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"fmt"
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"html/template"
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"math"
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"net/url"
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"regexp"
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"strings"
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"unicode"
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issues_model "code.gitea.io/gitea/models/issues"
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"code.gitea.io/gitea/modules/emoji"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/markup/markdown"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/translation"
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"code.gitea.io/gitea/modules/util"
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)
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// RenderCommitMessage renders commit message with XSS-safe and special links.
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func RenderCommitMessage(ctx context.Context, msg string, metas map[string]string) template.HTML {
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cleanMsg := template.HTMLEscapeString(msg)
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// we can safely assume that it will not return any error, since there
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// shouldn't be any special HTML.
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fullMessage, err := markup.RenderCommitMessage(&markup.RenderContext{
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Ctx: ctx,
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Metas: metas,
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}, cleanMsg)
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if err != nil {
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log.Error("RenderCommitMessage: %v", err)
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return ""
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}
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msgLines := strings.Split(strings.TrimSpace(fullMessage), "\n")
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if len(msgLines) == 0 {
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return template.HTML("")
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}
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return renderCodeBlock(template.HTML(msgLines[0]))
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}
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// renderCommitMessageLinkSubject renders commit message as a XSS-safe link to
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// the provided default url, handling for special links without email to links.
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func renderCommitMessageLinkSubject(ctx context.Context, msg, urlDefault string, metas map[string]string) template.HTML {
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msgLine := strings.TrimLeftFunc(msg, unicode.IsSpace)
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lineEnd := strings.IndexByte(msgLine, '\n')
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if lineEnd > 0 {
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msgLine = msgLine[:lineEnd]
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}
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msgLine = strings.TrimRightFunc(msgLine, unicode.IsSpace)
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if len(msgLine) == 0 {
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return template.HTML("")
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}
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// we can safely assume that it will not return any error, since there
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// shouldn't be any special HTML.
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renderedMessage, err := markup.RenderCommitMessageSubject(&markup.RenderContext{
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Ctx: ctx,
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DefaultLink: urlDefault,
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Metas: metas,
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}, template.HTMLEscapeString(msgLine))
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if err != nil {
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log.Error("RenderCommitMessageSubject: %v", err)
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return template.HTML("")
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}
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return renderCodeBlock(template.HTML(renderedMessage))
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}
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// renderCommitBody extracts the body of a commit message without its title.
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func renderCommitBody(ctx context.Context, msg string, metas map[string]string) template.HTML {
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msgLine := strings.TrimSpace(msg)
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lineEnd := strings.IndexByte(msgLine, '\n')
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if lineEnd > 0 {
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msgLine = msgLine[lineEnd+1:]
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} else {
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return ""
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}
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msgLine = strings.TrimLeftFunc(msgLine, unicode.IsSpace)
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if len(msgLine) == 0 {
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return ""
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}
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renderedMessage, err := markup.RenderCommitMessage(&markup.RenderContext{
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Ctx: ctx,
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Metas: metas,
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}, template.HTMLEscapeString(msgLine))
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if err != nil {
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log.Error("RenderCommitMessage: %v", err)
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return ""
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}
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return template.HTML(renderedMessage)
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}
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// Match text that is between back ticks.
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var codeMatcher = regexp.MustCompile("`([^`]+)`")
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// renderCodeBlock renders "`…`" as highlighted "<code>" block, intended for issue and PR titles
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func renderCodeBlock(htmlEscapedTextToRender template.HTML) template.HTML {
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htmlWithCodeTags := codeMatcher.ReplaceAllString(string(htmlEscapedTextToRender), `<code class="inline-code-block">$1</code>`) // replace with HTML <code> tags
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return template.HTML(htmlWithCodeTags)
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}
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// renderIssueTitle renders issue/pull title with defined post processors
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func renderIssueTitle(ctx context.Context, text string, metas map[string]string) template.HTML {
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renderedText, err := markup.RenderIssueTitle(&markup.RenderContext{
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Ctx: ctx,
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Metas: metas,
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}, template.HTMLEscapeString(text))
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if err != nil {
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log.Error("RenderIssueTitle: %v", err)
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return template.HTML("")
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}
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return template.HTML(renderedText)
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}
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// renderLabel renders a label
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// locale is needed due to an import cycle with our context providing the `Tr` function
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func renderLabel(ctx context.Context, locale translation.Locale, label *issues_model.Label) template.HTML {
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var extraCSSClasses string
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textColor := util.ContrastColor(label.Color)
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labelScope := label.ExclusiveScope()
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descriptionText := emoji.ReplaceAliases(label.Description)
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if label.IsArchived() {
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extraCSSClasses = "archived-label"
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descriptionText = fmt.Sprintf("(%s) %s", locale.TrString("archived"), descriptionText)
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}
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if labelScope == "" {
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// Regular label
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return HTMLFormat(`<div class="ui label %s" style="color: %s !important; background-color: %s !important;" data-tooltip-content title="%s">%s</div>`,
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extraCSSClasses, textColor, label.Color, descriptionText, renderEmoji(ctx, label.Name))
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}
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// Scoped label
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scopeHTML := renderEmoji(ctx, labelScope)
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itemHTML := renderEmoji(ctx, label.Name[len(labelScope)+1:])
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// Make scope and item background colors slightly darker and lighter respectively.
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// More contrast needed with higher luminance, empirically tweaked.
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luminance := util.GetRelativeLuminance(label.Color)
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contrast := 0.01 + luminance*0.03
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// Ensure we add the same amount of contrast also near 0 and 1.
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darken := contrast + math.Max(luminance+contrast-1.0, 0.0)
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lighten := contrast + math.Max(contrast-luminance, 0.0)
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// Compute factor to keep RGB values proportional.
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darkenFactor := math.Max(luminance-darken, 0.0) / math.Max(luminance, 1.0/255.0)
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lightenFactor := math.Min(luminance+lighten, 1.0) / math.Max(luminance, 1.0/255.0)
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r, g, b := util.HexToRBGColor(label.Color)
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scopeBytes := []byte{
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uint8(math.Min(math.Round(r*darkenFactor), 255)),
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uint8(math.Min(math.Round(g*darkenFactor), 255)),
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uint8(math.Min(math.Round(b*darkenFactor), 255)),
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}
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itemBytes := []byte{
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uint8(math.Min(math.Round(r*lightenFactor), 255)),
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uint8(math.Min(math.Round(g*lightenFactor), 255)),
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uint8(math.Min(math.Round(b*lightenFactor), 255)),
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}
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itemColor := "#" + hex.EncodeToString(itemBytes)
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scopeColor := "#" + hex.EncodeToString(scopeBytes)
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return HTMLFormat(`<span class="ui label %s scope-parent" data-tooltip-content title="%s">`+
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`<div class="ui label scope-left" style="color: %s !important; background-color: %s !important">%s</div>`+
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`<div class="ui label scope-right" style="color: %s !important; background-color: %s !important">%s</div>`+
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`</span>`,
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extraCSSClasses, descriptionText,
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textColor, scopeColor, scopeHTML,
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textColor, itemColor, itemHTML)
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}
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// renderEmoji renders html text with emoji post processors
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func renderEmoji(ctx context.Context, text string) template.HTML {
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renderedText, err := markup.RenderEmoji(&markup.RenderContext{Ctx: ctx},
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template.HTMLEscapeString(text))
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if err != nil {
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log.Error("RenderEmoji: %v", err)
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return template.HTML("")
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}
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return template.HTML(renderedText)
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}
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// reactionToEmoji renders emoji for use in reactions
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func reactionToEmoji(reaction string) template.HTML {
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val := emoji.FromCode(reaction)
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if val != nil {
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return template.HTML(val.Emoji)
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}
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val = emoji.FromAlias(reaction)
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if val != nil {
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return template.HTML(val.Emoji)
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}
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return template.HTML(fmt.Sprintf(`<img alt=":%s:" src="%s/assets/img/emoji/%s.png"></img>`, reaction, setting.StaticURLPrefix, url.PathEscape(reaction)))
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}
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func RenderMarkdownToHtml(ctx context.Context, input string) template.HTML { //nolint:revive
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output, err := markdown.RenderString(&markup.RenderContext{
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Ctx: ctx,
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Metas: map[string]string{"mode": "document"},
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}, input)
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if err != nil {
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log.Error("RenderString: %v", err)
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}
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return output
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}
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func RenderLabels(ctx context.Context, locale translation.Locale, labels []*issues_model.Label, repoLink string, issue *issues_model.Issue) template.HTML {
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isPullRequest := issue != nil && issue.IsPull
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baseLink := fmt.Sprintf("%s/%s", repoLink, util.Iif(isPullRequest, "pulls", "issues"))
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htmlCode := `<span class="labels-list">`
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for _, label := range labels {
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// Protect against nil value in labels - shouldn't happen but would cause a panic if so
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if label == nil {
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continue
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}
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htmlCode += fmt.Sprintf(`<a href="%s?labels=%d">%s</a>`, baseLink, label.ID, renderLabel(ctx, locale, label))
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}
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htmlCode += "</span>"
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return template.HTML(htmlCode)
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}
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