forgejo/modules/templates/helper.go
mrsdizzie 4563eb873d
Support unicode emojis and remove emojify.js (#11032)
* Support unicode emojis and remove emojify.js

This PR replaces all use of emojify.js and adds unicode emoji support to various areas of gitea.

This works in a few ways:

First it adds emoji parsing support into gitea itself. This allows us to

 * Render emojis from valid alias (😄)
 * Detect unicode emojis and let us put them in their own class with proper aria-labels and styling
 * Easily allow for custom "emoji"
 * Support all emoji rendering and features without javascript
 * Uses plain unicode and lets the system render in appropriate emoji font
 * Doesn't leave us relying on external sources for updates/fixes/features

That same list of emoji is also used to create a json file which replaces the part of emojify.js that populates the emoji search tribute. This file is about 35KB with GZIP turned on and I've set it to load after the page renders to not hinder page load time (and this removes loading emojify.js also)

For custom "emoji" it uses a pretty simple scheme of just looking for /emojis/img/name.png where name is something a user has put in the "allowed reactions" setting we already have. The gitea reaction that was previously hard coded into a forked copy of emojify.js is included and works as a custom reaction under this method.

The emoji data sourced here is from https://github.com/github/gemoji which is the gem library Github uses for their emoji rendering (and a data source for other sites). So we should be able to easily render any emoji and :alias: that Github can, removing any errors from migrated content. They also update it as well, so we can sync when there are new unicode emoji lists released.

I've included a slimmed down and slightly modified forked copy of https://github.com/knq/emoji to make up our own emoji module. The code is pretty straight forward and again allows us to have a lot of flexibility in what happens.

I had seen a few comments about performance in some of the other threads if we render this ourselves, but there doesn't seem to be any issue here. In a test it can parse, convert, and render 1,000 emojis inside of a large markdown table in about 100ms on my laptop (which is many more emojis than will ever be in any normal issue). This also prevents any flickering and other weirdness from using javascript to render some things while using go for others.

Not included here are image fall back URLS. I don't really think they are necessary for anything new being written in 2020. However, managing the emoji ourselves would allow us to add these as a feature later on if it seems necessary.

Fixes: https://github.com/go-gitea/gitea/issues/9182
Fixes: https://github.com/go-gitea/gitea/issues/8974
Fixes: https://github.com/go-gitea/gitea/issues/8953
Fixes: https://github.com/go-gitea/gitea/issues/6628
Fixes: https://github.com/go-gitea/gitea/issues/5130

* add new shared function emojiHTML

* don't increase emoji size in issue title

* Update templates/repo/issue/view_content/add_reaction.tmpl

Co-Authored-By: 6543 <6543@obermui.de>

* Support for emoji rendering in various templates

* Render code and review comments as they should be

* Better way to handle mail subjects

* insert unicode from tribute selection

* Add template helper for plain text when needed

* Use existing replace function I forgot about

* Don't include emoji greater than Unicode Version 12

Only include emoji and aliases in JSON

* Update build/generate-emoji.go

* Tweak regex slightly to really match everything including random invisible characters. Run tests for every emoji we have

* final updates

* code review

* code review

* hard code gitea custom emoji to match previous behavior

* Update .eslintrc

Co-Authored-By: silverwind <me@silverwind.io>

* disable preempt

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>
2020-04-28 15:05:39 -03:00

723 lines
20 KiB
Go

// Copyright 2018 The Gitea Authors. All rights reserved.
// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package templates
import (
"bytes"
"container/list"
"encoding/json"
"errors"
"fmt"
"html"
"html/template"
"mime"
"net/url"
"path/filepath"
"regexp"
"runtime"
"strings"
texttmpl "text/template"
"time"
"unicode"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/emoji"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/repository"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/gitdiff"
mirror_service "code.gitea.io/gitea/services/mirror"
"github.com/editorconfig/editorconfig-core-go/v2"
)
// Used from static.go && dynamic.go
var mailSubjectSplit = regexp.MustCompile(`(?m)^-{3,}[\s]*$`)
// NewFuncMap returns functions for injecting to templates
func NewFuncMap() []template.FuncMap {
return []template.FuncMap{map[string]interface{}{
"GoVer": func() string {
return strings.Title(runtime.Version())
},
"UseHTTPS": func() bool {
return strings.HasPrefix(setting.AppURL, "https")
},
"AppName": func() string {
return setting.AppName
},
"AppSubUrl": func() string {
return setting.AppSubURL
},
"StaticUrlPrefix": func() string {
return setting.StaticURLPrefix
},
"AppUrl": func() string {
return setting.AppURL
},
"AppVer": func() string {
return setting.AppVer
},
"AppBuiltWith": func() string {
return setting.AppBuiltWith
},
"AppDomain": func() string {
return setting.Domain
},
"DisableGravatar": func() bool {
return setting.DisableGravatar
},
"DefaultShowFullName": func() bool {
return setting.UI.DefaultShowFullName
},
"ShowFooterTemplateLoadTime": func() bool {
return setting.ShowFooterTemplateLoadTime
},
"LoadTimes": func(startTime time.Time) string {
return fmt.Sprint(time.Since(startTime).Nanoseconds()/1e6) + "ms"
},
"AllowedReactions": func() []string {
return setting.UI.Reactions
},
"AvatarLink": models.AvatarLink,
"Safe": Safe,
"SafeJS": SafeJS,
"Str2html": Str2html,
"TimeSince": timeutil.TimeSince,
"TimeSinceUnix": timeutil.TimeSinceUnix,
"RawTimeSince": timeutil.RawTimeSince,
"FileSize": base.FileSize,
"PrettyNumber": base.PrettyNumber,
"Subtract": base.Subtract,
"EntryIcon": base.EntryIcon,
"MigrationIcon": MigrationIcon,
"Add": func(a, b int) int {
return a + b
},
"ActionIcon": ActionIcon,
"DateFmtLong": func(t time.Time) string {
return t.Format(time.RFC1123Z)
},
"DateFmtShort": func(t time.Time) string {
return t.Format("Jan 02, 2006")
},
"SizeFmt": base.FileSize,
"List": List,
"SubStr": func(str string, start, length int) string {
if len(str) == 0 {
return ""
}
end := start + length
if length == -1 {
end = len(str)
}
if len(str) < end {
return str
}
return str[start:end]
},
"EllipsisString": base.EllipsisString,
"DiffTypeToStr": DiffTypeToStr,
"DiffLineTypeToStr": DiffLineTypeToStr,
"Sha1": Sha1,
"ShortSha": base.ShortSha,
"MD5": base.EncodeMD5,
"ActionContent2Commits": ActionContent2Commits,
"PathEscape": url.PathEscape,
"EscapePound": func(str string) string {
return strings.NewReplacer("%", "%25", "#", "%23", " ", "%20", "?", "%3F").Replace(str)
},
"PathEscapeSegments": util.PathEscapeSegments,
"URLJoin": util.URLJoin,
"RenderCommitMessage": RenderCommitMessage,
"RenderCommitMessageLink": RenderCommitMessageLink,
"RenderCommitMessageLinkSubject": RenderCommitMessageLinkSubject,
"RenderCommitBody": RenderCommitBody,
"RenderEmoji": RenderEmoji,
"RenderEmojiPlain": emoji.ReplaceAliases,
"ReactionToEmoji": ReactionToEmoji,
"RenderNote": RenderNote,
"IsMultilineCommitMessage": IsMultilineCommitMessage,
"ThemeColorMetaTag": func() string {
return setting.UI.ThemeColorMetaTag
},
"MetaAuthor": func() string {
return setting.UI.Meta.Author
},
"MetaDescription": func() string {
return setting.UI.Meta.Description
},
"MetaKeywords": func() string {
return setting.UI.Meta.Keywords
},
"UseServiceWorker": func() bool {
return setting.UI.UseServiceWorker
},
"FilenameIsImage": func(filename string) bool {
mimeType := mime.TypeByExtension(filepath.Ext(filename))
return strings.HasPrefix(mimeType, "image/")
},
"TabSizeClass": func(ec *editorconfig.Editorconfig, filename string) string {
if ec != nil {
def, err := ec.GetDefinitionForFilename(filename)
if err != nil {
log.Error("tab size class: getting definition for filename: %v", err)
return "tab-size-8"
}
if def.TabWidth > 0 {
return fmt.Sprintf("tab-size-%d", def.TabWidth)
}
}
return "tab-size-8"
},
"SubJumpablePath": func(str string) []string {
var path []string
index := strings.LastIndex(str, "/")
if index != -1 && index != len(str) {
path = append(path, str[0:index+1], str[index+1:])
} else {
path = append(path, str)
}
return path
},
"Json": func(in interface{}) string {
out, err := json.Marshal(in)
if err != nil {
return ""
}
return string(out)
},
"JsonPrettyPrint": func(in string) string {
var out bytes.Buffer
err := json.Indent(&out, []byte(in), "", " ")
if err != nil {
return ""
}
return out.String()
},
"DisableGitHooks": func() bool {
return setting.DisableGitHooks
},
"DisableImportLocal": func() bool {
return !setting.ImportLocalPaths
},
"TrN": TrN,
"Dict": func(values ...interface{}) (map[string]interface{}, error) {
if len(values)%2 != 0 {
return nil, errors.New("invalid dict call")
}
dict := make(map[string]interface{}, len(values)/2)
for i := 0; i < len(values); i += 2 {
key, ok := values[i].(string)
if !ok {
return nil, errors.New("dict keys must be strings")
}
dict[key] = values[i+1]
}
return dict, nil
},
"Printf": fmt.Sprintf,
"Escape": Escape,
"Sec2Time": models.SecToTime,
"ParseDeadline": func(deadline string) []string {
return strings.Split(deadline, "|")
},
"DefaultTheme": func() string {
return setting.UI.DefaultTheme
},
"dict": func(values ...interface{}) (map[string]interface{}, error) {
if len(values) == 0 {
return nil, errors.New("invalid dict call")
}
dict := make(map[string]interface{})
for i := 0; i < len(values); i++ {
switch key := values[i].(type) {
case string:
i++
if i == len(values) {
return nil, errors.New("specify the key for non array values")
}
dict[key] = values[i]
case map[string]interface{}:
m := values[i].(map[string]interface{})
for i, v := range m {
dict[i] = v
}
default:
return nil, errors.New("dict values must be maps")
}
}
return dict, nil
},
"percentage": func(n int, values ...int) float32 {
var sum = 0
for i := 0; i < len(values); i++ {
sum += values[i]
}
return float32(n) * 100 / float32(sum)
},
"CommentMustAsDiff": gitdiff.CommentMustAsDiff,
"MirrorAddress": mirror_service.Address,
"MirrorFullAddress": mirror_service.AddressNoCredentials,
"MirrorUserName": mirror_service.Username,
"MirrorPassword": mirror_service.Password,
"CommitType": func(commit interface{}) string {
switch commit.(type) {
case models.SignCommitWithStatuses:
return "SignCommitWithStatuses"
case models.SignCommit:
return "SignCommit"
case models.UserCommit:
return "UserCommit"
default:
return ""
}
},
"NotificationSettings": func() map[string]int {
return map[string]int{
"MinTimeout": int(setting.UI.Notification.MinTimeout / time.Millisecond),
"TimeoutStep": int(setting.UI.Notification.TimeoutStep / time.Millisecond),
"MaxTimeout": int(setting.UI.Notification.MaxTimeout / time.Millisecond),
}
},
"contain": func(s []int64, id int64) bool {
for i := 0; i < len(s); i++ {
if s[i] == id {
return true
}
}
return false
},
"svg": func(icon string, size int) template.HTML {
return template.HTML(fmt.Sprintf(`<svg class="svg %s" width="%d" height="%d" aria-hidden="true"><use xlink:href="#%s" /></svg>`, icon, size, size, icon))
},
}}
}
// NewTextFuncMap returns functions for injecting to text templates
// It's a subset of those used for HTML and other templates
func NewTextFuncMap() []texttmpl.FuncMap {
return []texttmpl.FuncMap{map[string]interface{}{
"GoVer": func() string {
return strings.Title(runtime.Version())
},
"AppName": func() string {
return setting.AppName
},
"AppSubUrl": func() string {
return setting.AppSubURL
},
"AppUrl": func() string {
return setting.AppURL
},
"AppVer": func() string {
return setting.AppVer
},
"AppBuiltWith": func() string {
return setting.AppBuiltWith
},
"AppDomain": func() string {
return setting.Domain
},
"TimeSince": timeutil.TimeSince,
"TimeSinceUnix": timeutil.TimeSinceUnix,
"RawTimeSince": timeutil.RawTimeSince,
"DateFmtLong": func(t time.Time) string {
return t.Format(time.RFC1123Z)
},
"DateFmtShort": func(t time.Time) string {
return t.Format("Jan 02, 2006")
},
"List": List,
"SubStr": func(str string, start, length int) string {
if len(str) == 0 {
return ""
}
end := start + length
if length == -1 {
end = len(str)
}
if len(str) < end {
return str
}
return str[start:end]
},
"EllipsisString": base.EllipsisString,
"URLJoin": util.URLJoin,
"Dict": func(values ...interface{}) (map[string]interface{}, error) {
if len(values)%2 != 0 {
return nil, errors.New("invalid dict call")
}
dict := make(map[string]interface{}, len(values)/2)
for i := 0; i < len(values); i += 2 {
key, ok := values[i].(string)
if !ok {
return nil, errors.New("dict keys must be strings")
}
dict[key] = values[i+1]
}
return dict, nil
},
"Printf": fmt.Sprintf,
"Escape": Escape,
"Sec2Time": models.SecToTime,
"ParseDeadline": func(deadline string) []string {
return strings.Split(deadline, "|")
},
"dict": func(values ...interface{}) (map[string]interface{}, error) {
if len(values) == 0 {
return nil, errors.New("invalid dict call")
}
dict := make(map[string]interface{})
for i := 0; i < len(values); i++ {
switch key := values[i].(type) {
case string:
i++
if i == len(values) {
return nil, errors.New("specify the key for non array values")
}
dict[key] = values[i]
case map[string]interface{}:
m := values[i].(map[string]interface{})
for i, v := range m {
dict[i] = v
}
default:
return nil, errors.New("dict values must be maps")
}
}
return dict, nil
},
"percentage": func(n int, values ...int) float32 {
var sum = 0
for i := 0; i < len(values); i++ {
sum += values[i]
}
return float32(n) * 100 / float32(sum)
},
}}
}
// Safe render raw as HTML
func Safe(raw string) template.HTML {
return template.HTML(raw)
}
// SafeJS renders raw as JS
func SafeJS(raw string) template.JS {
return template.JS(raw)
}
// Str2html render Markdown text to HTML
func Str2html(raw string) template.HTML {
return template.HTML(markup.Sanitize(raw))
}
// Escape escapes a HTML string
func Escape(raw string) string {
return html.EscapeString(raw)
}
// List traversings the list
func List(l *list.List) chan interface{} {
e := l.Front()
c := make(chan interface{})
go func() {
for e != nil {
c <- e.Value
e = e.Next()
}
close(c)
}()
return c
}
// Sha1 returns sha1 sum of string
func Sha1(str string) string {
return base.EncodeSha1(str)
}
// RenderCommitMessage renders commit message with XSS-safe and special links.
func RenderCommitMessage(msg, urlPrefix string, metas map[string]string) template.HTML {
return RenderCommitMessageLink(msg, urlPrefix, "", metas)
}
// RenderCommitMessageLink renders commit message as a XXS-safe link to the provided
// default url, handling for special links.
func RenderCommitMessageLink(msg, urlPrefix, urlDefault string, metas map[string]string) template.HTML {
cleanMsg := template.HTMLEscapeString(msg)
// we can safely assume that it will not return any error, since there
// shouldn't be any special HTML.
fullMessage, err := markup.RenderCommitMessage([]byte(cleanMsg), urlPrefix, urlDefault, metas)
if err != nil {
log.Error("RenderCommitMessage: %v", err)
return ""
}
msgLines := strings.Split(strings.TrimSpace(string(fullMessage)), "\n")
if len(msgLines) == 0 {
return template.HTML("")
}
return template.HTML(msgLines[0])
}
// RenderCommitMessageLinkSubject renders commit message as a XXS-safe link to
// the provided default url, handling for special links without email to links.
func RenderCommitMessageLinkSubject(msg, urlPrefix, urlDefault string, metas map[string]string) template.HTML {
msgLine := strings.TrimLeftFunc(msg, unicode.IsSpace)
lineEnd := strings.IndexByte(msgLine, '\n')
if lineEnd > 0 {
msgLine = msgLine[:lineEnd]
}
msgLine = strings.TrimRightFunc(msgLine, unicode.IsSpace)
if len(msgLine) == 0 {
return template.HTML("")
}
// we can safely assume that it will not return any error, since there
// shouldn't be any special HTML.
renderedMessage, err := markup.RenderCommitMessageSubject([]byte(template.HTMLEscapeString(msgLine)), urlPrefix, urlDefault, metas)
if err != nil {
log.Error("RenderCommitMessageSubject: %v", err)
return template.HTML("")
}
return template.HTML(renderedMessage)
}
// RenderCommitBody extracts the body of a commit message without its title.
func RenderCommitBody(msg, urlPrefix string, metas map[string]string) template.HTML {
msgLine := strings.TrimRightFunc(msg, unicode.IsSpace)
lineEnd := strings.IndexByte(msgLine, '\n')
if lineEnd > 0 {
msgLine = msgLine[lineEnd+1:]
} else {
return template.HTML("")
}
msgLine = strings.TrimLeftFunc(msgLine, unicode.IsSpace)
if len(msgLine) == 0 {
return template.HTML("")
}
renderedMessage, err := markup.RenderCommitMessage([]byte(template.HTMLEscapeString(msgLine)), urlPrefix, "", metas)
if err != nil {
log.Error("RenderCommitMessage: %v", err)
return ""
}
return template.HTML(renderedMessage)
}
// RenderEmoji renders html text with emoji post processors
func RenderEmoji(text string) template.HTML {
renderedText, err := markup.RenderEmoji([]byte(template.HTMLEscapeString(text)))
if err != nil {
log.Error("RenderEmoji: %v", err)
return template.HTML("")
}
return template.HTML(renderedText)
}
//ReactionToEmoji renders emoji for use in reactions
func ReactionToEmoji(reaction string) template.HTML {
val := emoji.FromCode(reaction)
if val != nil {
return template.HTML(val.Emoji)
}
val = emoji.FromAlias(reaction)
if val != nil {
return template.HTML(val.Emoji)
}
return template.HTML(fmt.Sprintf(`<img src=%s/img/emoji/%s.png></img>`, setting.StaticURLPrefix, reaction))
}
// RenderNote renders the contents of a git-notes file as a commit message.
func RenderNote(msg, urlPrefix string, metas map[string]string) template.HTML {
cleanMsg := template.HTMLEscapeString(msg)
fullMessage, err := markup.RenderCommitMessage([]byte(cleanMsg), urlPrefix, "", metas)
if err != nil {
log.Error("RenderNote: %v", err)
return ""
}
return template.HTML(string(fullMessage))
}
// IsMultilineCommitMessage checks to see if a commit message contains multiple lines.
func IsMultilineCommitMessage(msg string) bool {
return strings.Count(strings.TrimSpace(msg), "\n") >= 1
}
// Actioner describes an action
type Actioner interface {
GetOpType() models.ActionType
GetActUserName() string
GetRepoUserName() string
GetRepoName() string
GetRepoPath() string
GetRepoLink() string
GetBranch() string
GetContent() string
GetCreate() time.Time
GetIssueInfos() []string
}
// ActionIcon accepts an action operation type and returns an icon class name.
func ActionIcon(opType models.ActionType) string {
switch opType {
case models.ActionCreateRepo, models.ActionTransferRepo:
return "repo"
case models.ActionCommitRepo, models.ActionPushTag, models.ActionDeleteTag, models.ActionDeleteBranch:
return "git-commit"
case models.ActionCreateIssue:
return "issue-opened"
case models.ActionCreatePullRequest:
return "git-pull-request"
case models.ActionCommentIssue, models.ActionCommentPull:
return "comment-discussion"
case models.ActionMergePullRequest:
return "git-merge"
case models.ActionCloseIssue, models.ActionClosePullRequest:
return "issue-closed"
case models.ActionReopenIssue, models.ActionReopenPullRequest:
return "issue-reopened"
case models.ActionMirrorSyncPush, models.ActionMirrorSyncCreate, models.ActionMirrorSyncDelete:
return "repo-clone"
case models.ActionApprovePullRequest:
return "check"
case models.ActionRejectPullRequest:
return "request-changes"
default:
return "question"
}
}
// ActionContent2Commits converts action content to push commits
func ActionContent2Commits(act Actioner) *repository.PushCommits {
push := repository.NewPushCommits()
if err := json.Unmarshal([]byte(act.GetContent()), push); err != nil {
log.Error("json.Unmarshal:\n%s\nERROR: %v", act.GetContent(), err)
}
return push
}
// DiffTypeToStr returns diff type name
func DiffTypeToStr(diffType int) string {
diffTypes := map[int]string{
1: "add", 2: "modify", 3: "del", 4: "rename",
}
return diffTypes[diffType]
}
// DiffLineTypeToStr returns diff line type name
func DiffLineTypeToStr(diffType int) string {
switch diffType {
case 2:
return "add"
case 3:
return "del"
case 4:
return "tag"
}
return "same"
}
// Language specific rules for translating plural texts
var trNLangRules = map[string]func(int64) int{
"en-US": func(cnt int64) int {
if cnt == 1 {
return 0
}
return 1
},
"lv-LV": func(cnt int64) int {
if cnt%10 == 1 && cnt%100 != 11 {
return 0
}
return 1
},
"ru-RU": func(cnt int64) int {
if cnt%10 == 1 && cnt%100 != 11 {
return 0
}
return 1
},
"zh-CN": func(cnt int64) int {
return 0
},
"zh-HK": func(cnt int64) int {
return 0
},
"zh-TW": func(cnt int64) int {
return 0
},
"fr-FR": func(cnt int64) int {
if cnt > -2 && cnt < 2 {
return 0
}
return 1
},
}
// TrN returns key to be used for plural text translation
func TrN(lang string, cnt interface{}, key1, keyN string) string {
var c int64
if t, ok := cnt.(int); ok {
c = int64(t)
} else if t, ok := cnt.(int16); ok {
c = int64(t)
} else if t, ok := cnt.(int32); ok {
c = int64(t)
} else if t, ok := cnt.(int64); ok {
c = t
} else {
return keyN
}
ruleFunc, ok := trNLangRules[lang]
if !ok {
ruleFunc = trNLangRules["en-US"]
}
if ruleFunc(c) == 0 {
return key1
}
return keyN
}
// MigrationIcon returns a Font Awesome name matching the service an issue/comment was migrated from
func MigrationIcon(hostname string) string {
switch hostname {
case "github.com":
return "fa-github"
default:
return "fa-git-alt"
}
}
func buildSubjectBodyTemplate(stpl *texttmpl.Template, btpl *template.Template, name string, content []byte) {
// Split template into subject and body
var subjectContent []byte
bodyContent := content
loc := mailSubjectSplit.FindIndex(content)
if loc != nil {
subjectContent = content[0:loc[0]]
bodyContent = content[loc[1]:]
}
if _, err := stpl.New(name).
Parse(string(subjectContent)); err != nil {
log.Warn("Failed to parse template [%s/subject]: %v", name, err)
}
if _, err := btpl.New(name).
Parse(string(bodyContent)); err != nil {
log.Warn("Failed to parse template [%s/body]: %v", name, err)
}
}