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+// SiYuan - Refactor your thinking
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+// Copyright (c) 2020-present, b3log.org
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+//
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+// This program is free software: you can redistribute it and/or modify
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+// it under the terms of the GNU Affero General Public License as published by
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+// the Free Software Foundation, either version 3 of the License, or
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+// (at your option) any later version.
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+//
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+// This program is distributed in the hope that it will be useful,
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+// but WITHOUT ANY WARRANTY; without even the implied warranty of
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+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+// GNU Affero General Public License for more details.
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+//
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+// You should have received a copy of the GNU Affero General Public License
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+// along with this program. If not, see <https://www.gnu.org/licenses/>.
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+
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+package model
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+
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+import (
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+ "bytes"
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+ "os"
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+ "path/filepath"
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+ "strings"
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+
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+ "github.com/88250/lute/ast"
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+ "github.com/88250/lute/parse"
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+ "github.com/gorilla/css/scanner"
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+ "github.com/siyuan-note/logging"
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+ "github.com/siyuan-note/siyuan/kernel/util"
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+ "github.com/vanng822/css"
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+)
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+
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+func fillThemeStyleVar(tree *parse.Tree) {
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+ themeStyles := getThemeStyleVar(Conf.Appearance.ThemeLight)
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+ if 1 > len(themeStyles) {
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+ return
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+ }
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+
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+ ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
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+ if !entering {
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+ return ast.WalkContinue
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+ }
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+
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+ for _, ial := range n.KramdownIAL {
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+ if "style" != ial[0] {
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+ continue
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+ }
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+
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+ styleSheet := css.Parse(ial[1])
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+ buf := bytes.Buffer{}
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+ for _, r := range styleSheet.GetCSSRuleList() {
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+ styles := getStyleVarName(r.Style.Selector)
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+ for style, name := range styles {
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+ buf.WriteString(style)
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+ buf.WriteString(": ")
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+ value := themeStyles[name]
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+ if "" == value {
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+ // 回退为变量
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+ buf.WriteString("var(")
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+ buf.WriteString(name)
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+ buf.WriteString(")")
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+ } else {
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+ buf.WriteString(value)
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+ }
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+ buf.WriteString("; ")
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+ }
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+ }
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+ if 0 < buf.Len() {
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+ ial[1] = strings.TrimSpace(buf.String())
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+ }
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+ }
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+ return ast.WalkContinue
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+ })
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+}
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+
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+func getStyleVarName(value *css.CSSValue) (ret map[string]string) {
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+ ret = map[string]string{}
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+
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+ var start, end int
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+ var style, name string
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+ for i, t := range value.Tokens {
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+ if scanner.TokenIdent == t.Type && 0 == start {
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+ style = strings.TrimSpace(t.Value)
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+ continue
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+ }
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+
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+ if scanner.TokenFunction == t.Type && "var(" == t.Value {
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+ start = i
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+ continue
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+ }
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+ if scanner.TokenChar == t.Type && ")" == t.Value {
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+ end = i
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+
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+ if 0 < start && 0 < end {
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+ for _, tt := range value.Tokens[start+1 : end] {
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+ name += tt.Value
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+ }
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+ name = strings.TrimSpace(name)
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+ }
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+ start, end = 0, 0
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+ ret[style] = name
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+ style, name = "", ""
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+ }
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+ }
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+ return
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+}
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+
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+func getThemeStyleVar(theme string) (ret map[string]string) {
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+ ret = map[string]string{}
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+
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+ data, err := os.ReadFile(filepath.Join(util.ThemesPath, theme, "theme.css"))
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+ if nil != err {
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+ logging.LogErrorf("read theme [%s] css file failed: %s", theme, err)
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+ return
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+ }
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+
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+ styleSheet := css.Parse(string(data))
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+ for _, rule := range styleSheet.GetCSSRuleList() {
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+ for _, style := range rule.Style.Styles {
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+ ret[style.Property] = strings.TrimSpace(style.Value.Text())
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+ // 如果两个短横线开头 CSS 解析器有问题，--b3-theme-primary: #3575f0; 会被解析为 -b3-theme-primary:- #3575f0
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+ // 这里两种解析都放到结果中
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+ ret["-"+style.Property] = strings.TrimSpace(strings.TrimPrefix(style.Value.Text(), "-"))
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+ }
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+ }
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+ return
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+}
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Vanessa