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rui/theme.go

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package rui
import (
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"fmt"
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"sort"
"strconv"
"strings"
)
const (
DefaultMedia = 0
PortraitMedia = 1
LandscapeMedia = 2
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)
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type mediaStyle struct {
orientation int
maxWidth int
maxHeight int
styles map[string]ViewStyle
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}
type theme struct {
name string
constants map[string]string
touchConstants map[string]string
colors map[string]string
darkColors map[string]string
images map[string]string
darkImages map[string]string
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styles map[string]ViewStyle
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mediaStyles []mediaStyle
}
type Theme interface {
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fmt.Stringer
Name() string
Constant(tag string) (string, string)
SetConstant(tag string, value, touchUIValue string)
// ConstantTags returns the list of all available constants
ConstantTags() []string
Color(tag string) (string, string)
SetColor(tag, color, darkUIColor string)
// ColorTags returns the list of all available color constants
ColorTags() []string
Image(tag string) (string, string)
SetImage(tag, image, darkUIImage string)
// ImageConstantTags returns the list of all available image constants
ImageConstantTags() []string
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Style(tag string) ViewStyle
SetStyle(tag string, style ViewStyle)
MediaStyle(tag string, orientation, maxWidth, maxHeight int) ViewStyle
SetMediaStyle(tag string, orientation, maxWidth, maxHeight int, style ViewStyle)
StyleTags() []string
MediaStyles(tag string) []struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
}
Append(anotherTheme Theme)
constant(tag string, touchUI bool) string
color(tag string, darkUI bool) string
image(tag string, darkUI bool) string
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style(tag string) ViewStyle
cssText(session Session) string
data() *theme
}
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func (rule mediaStyle) cssText() string {
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builder := allocStringBuilder()
defer freeStringBuilder(builder)
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switch rule.orientation {
case PortraitMedia:
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builder.WriteString(" and (orientation: portrait)")
case LandscapeMedia:
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builder.WriteString(" and (orientation: landscape)")
}
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if rule.maxWidth > 0 {
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builder.WriteString(" and (max-width: ")
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builder.WriteString(strconv.Itoa(rule.maxWidth))
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builder.WriteString("px)")
}
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if rule.maxHeight > 0 {
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builder.WriteString(" and (max-height: ")
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builder.WriteString(strconv.Itoa(rule.maxHeight))
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builder.WriteString("px)")
}
return builder.String()
}
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func parseMediaRule(text string) (mediaStyle, bool) {
rule := mediaStyle{
orientation: DefaultMedia,
maxWidth: 0,
maxHeight: 0,
styles: map[string]ViewStyle{},
}
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elements := strings.Split(text, ":")
for i := 1; i < len(elements); i++ {
switch element := elements[i]; element {
case "portrait":
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if rule.orientation != DefaultMedia {
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ErrorLog(`Duplicate orientation tag in the style section "` + text + `"`)
return rule, false
}
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rule.orientation = PortraitMedia
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case "landscape":
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if rule.orientation != DefaultMedia {
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ErrorLog(`Duplicate orientation tag in the style section "` + text + `"`)
return rule, false
}
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rule.orientation = LandscapeMedia
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default:
elementSize := func(name string) (int, bool) {
if strings.HasPrefix(element, name) {
size, err := strconv.Atoi(element[len(name):])
if err == nil && size > 0 {
return size, true
}
ErrorLogF(`Invalid style section name "%s": %s`, text, err.Error())
return 0, false
}
return 0, true
}
if size, ok := elementSize("width"); !ok || size > 0 {
if !ok {
return rule, false
}
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if rule.maxWidth != 0 {
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ErrorLog(`Duplicate "width" tag in the style section "` + text + `"`)
return rule, false
}
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rule.maxWidth = size
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} else if size, ok := elementSize("height"); !ok || size > 0 {
if !ok {
return rule, false
}
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if rule.maxHeight != 0 {
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ErrorLog(`Duplicate "height" tag in the style section "` + text + `"`)
return rule, false
}
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rule.maxHeight = size
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} else {
ErrorLogF(`Unknown elemnet "%s" in the style section name "%s"`, element, text)
return rule, false
}
}
}
return rule, true
}
var defaultTheme = NewTheme("")
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func NewTheme(name string) Theme {
result := new(theme)
result.init()
result.name = name
return result
}
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func CreateThemeFromText(text string) (Theme, bool) {
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result := new(theme)
result.init()
ok := result.addText(text)
return result, ok
}
func (theme *theme) init() {
theme.constants = map[string]string{}
theme.touchConstants = map[string]string{}
theme.colors = map[string]string{}
theme.darkColors = map[string]string{}
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theme.images = map[string]string{}
theme.darkImages = map[string]string{}
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theme.styles = map[string]ViewStyle{}
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theme.mediaStyles = []mediaStyle{}
}
func (theme *theme) Name() string {
return theme.name
}
func (theme *theme) Constant(tag string) (string, string) {
return theme.constants[tag], theme.touchConstants[tag]
}
func (theme *theme) SetConstant(tag, value, touchUIValue string) {
value = strings.Trim(value, " \t")
if value == "" {
delete(theme.constants, tag)
delete(theme.touchConstants, tag)
} else {
theme.constants[tag] = value
touchUIValue = strings.Trim(touchUIValue, " \t")
if touchUIValue == "" {
delete(theme.touchConstants, tag)
} else {
theme.touchConstants[tag] = touchUIValue
}
}
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}
func (theme *theme) Color(tag string) (string, string) {
return theme.colors[tag], theme.darkColors[tag]
}
func (theme *theme) SetColor(tag, color, darkUIColor string) {
color = strings.Trim(color, " \t")
if color == "" {
delete(theme.colors, tag)
delete(theme.darkColors, tag)
} else {
theme.colors[tag] = color
darkUIColor = strings.Trim(darkUIColor, " \t")
if darkUIColor == "" {
delete(theme.darkColors, tag)
} else {
theme.darkColors[tag] = darkUIColor
}
}
}
func (theme *theme) Image(tag string) (string, string) {
return theme.images[tag], theme.darkImages[tag]
}
func (theme *theme) SetImage(tag, image, darkUIImage string) {
image = strings.Trim(image, " \t")
if image == "" {
delete(theme.images, tag)
delete(theme.darkImages, tag)
} else {
theme.images[tag] = image
darkUIImage = strings.Trim(darkUIImage, " \t")
if darkUIImage == "" {
delete(theme.darkImages, tag)
} else {
theme.darkImages[tag] = darkUIImage
}
}
}
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func (theme *theme) Style(tag string) ViewStyle {
if style, ok := theme.styles[tag]; ok {
return style
}
return nil
}
func (theme *theme) SetStyle(tag string, style ViewStyle) {
if style != nil {
theme.styles[tag] = style
} else {
delete(theme.styles, tag)
}
}
func (theme *theme) MediaStyle(tag string, orientation, maxWidth, maxHeight int) ViewStyle {
for _, styles := range theme.mediaStyles {
if styles.orientation == orientation && styles.maxWidth == maxWidth && styles.maxHeight == maxHeight {
if style, ok := styles.styles[tag]; ok {
return style
}
}
}
if orientation == 0 && maxWidth <= 0 && maxHeight <= 0 {
return theme.style(tag)
}
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return nil
}
func (theme *theme) SetMediaStyle(tag string, orientation, maxWidth, maxHeight int, style ViewStyle) {
if maxWidth < 0 {
maxWidth = 0
}
if maxHeight < 0 {
maxHeight = 0
}
if orientation == DefaultMedia && maxWidth == 0 && maxHeight == 0 {
theme.SetStyle(tag, style)
return
}
for i, styles := range theme.mediaStyles {
if styles.orientation == orientation && styles.maxWidth == maxWidth && styles.maxHeight == maxHeight {
if style != nil {
theme.mediaStyles[i].styles[tag] = style
} else {
delete(theme.mediaStyles[i].styles, tag)
}
break
}
}
if style != nil {
theme.mediaStyles = append(theme.mediaStyles, mediaStyle{
orientation: orientation,
maxWidth: maxWidth,
maxHeight: maxHeight,
styles: map[string]ViewStyle{tag: style},
})
theme.sortMediaStyles()
}
}
func (theme *theme) ConstantTags() []string {
keys := make([]string, 0, len(theme.constants))
for k := range theme.constants {
keys = append(keys, k)
}
for tag := range theme.touchConstants {
if _, ok := theme.constants[tag]; !ok {
keys = append(keys, tag)
}
}
sort.Strings(keys)
return keys
}
func (theme *theme) ColorTags() []string {
keys := make([]string, 0, len(theme.colors))
for k := range theme.colors {
keys = append(keys, k)
}
for tag := range theme.darkColors {
if _, ok := theme.colors[tag]; !ok {
keys = append(keys, tag)
}
}
sort.Strings(keys)
return keys
}
func (theme *theme) ImageConstantTags() []string {
keys := make([]string, 0, len(theme.colors))
for k := range theme.images {
keys = append(keys, k)
}
for tag := range theme.darkImages {
if _, ok := theme.images[tag]; !ok {
keys = append(keys, tag)
}
}
sort.Strings(keys)
return keys
}
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func (theme *theme) StyleTags() []string {
keys := make([]string, 0, len(theme.styles)*2)
appendTag := func(k string) {
n := sort.SearchStrings(keys, k)
if n >= len(keys) {
keys = append(keys, k)
} else if keys[n] != k {
if n == 0 {
keys = append([]string{k}, keys...)
} else {
keys = append(keys[:n+1], keys[n:]...)
keys[n] = k
}
}
}
for k := range theme.styles {
if index := strings.IndexRune(k, ':'); index < 0 {
keys = append(keys, k)
}
}
sort.Strings(keys)
for k := range theme.styles {
if index := strings.IndexRune(k, ':'); index > 0 {
appendTag(k[:index])
}
}
for _, media := range theme.mediaStyles {
for k := range media.styles {
index := strings.IndexRune(k, ':')
if index > 0 {
appendTag(k[:index])
} else if index < 0 {
appendTag(k)
}
}
}
return keys
}
func (theme *theme) MediaStyles(tag string) []struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
} {
result := []struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
}{}
prefix := tag + ":"
prefixLen := len(prefix)
for themeTag := range theme.styles {
if strings.HasPrefix(themeTag, prefix) {
result = append(result, struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
}{
Selectors: themeTag[prefixLen:],
Orientation: DefaultMedia,
MaxWidth: 0,
MaxHeight: 0,
})
}
}
for _, media := range theme.mediaStyles {
if _, ok := media.styles[tag]; ok {
result = append(result, struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
}{
Selectors: "",
Orientation: media.orientation,
MaxWidth: media.maxWidth,
MaxHeight: media.maxHeight,
})
}
for themeTag := range media.styles {
if strings.HasPrefix(themeTag, prefix) {
result = append(result, struct {
Selectors string
Orientation, MaxWidth, MaxHeight int
}{
Selectors: themeTag[prefixLen:],
Orientation: media.orientation,
MaxWidth: media.maxWidth,
MaxHeight: media.maxHeight,
})
}
}
}
return result
}
func (theme *theme) data() *theme {
return theme
}
func (theme *theme) Append(anotherTheme Theme) {
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if theme.constants == nil {
theme.init()
}
another := anotherTheme.data()
for tag, constant := range another.constants {
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theme.constants[tag] = constant
}
for tag, constant := range another.touchConstants {
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theme.touchConstants[tag] = constant
}
for tag, color := range another.colors {
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theme.colors[tag] = color
}
for tag, color := range another.darkColors {
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theme.darkColors[tag] = color
}
for tag, image := range another.images {
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theme.images[tag] = image
}
for tag, image := range another.darkImages {
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theme.darkImages[tag] = image
}
for tag, style := range another.styles {
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theme.styles[tag] = style
}
for _, anotherMedia := range another.mediaStyles {
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exists := false
for _, media := range theme.mediaStyles {
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if anotherMedia.maxHeight == media.maxHeight &&
anotherMedia.maxWidth == media.maxWidth &&
anotherMedia.orientation == media.orientation {
for tag, style := range anotherMedia.styles {
media.styles[tag] = style
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}
exists = true
break
}
}
if !exists {
theme.mediaStyles = append(theme.mediaStyles, anotherMedia)
}
}
}
func (theme *theme) cssText(session Session) string {
if theme.styles == nil {
theme.init()
return ""
}
var builder cssStyleBuilder
builder.init()
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for tag, style := range theme.styles {
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builder.startStyle(tag)
style.cssViewStyle(&builder, session)
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builder.endStyle()
}
for _, media := range theme.mediaStyles {
builder.startMedia(media.cssText())
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for tag, style := range media.styles {
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builder.startStyle(tag)
style.cssViewStyle(&builder, session)
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builder.endStyle()
}
builder.endMedia()
}
return builder.finish()
}
func (theme *theme) addText(themeText string) bool {
if theme.constants == nil {
theme.init()
}
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data := ParseDataText(themeText)
if data == nil || !data.IsObject() || data.Tag() != "theme" {
return false
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}
count := data.PropertyCount()
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objToStyle := func(obj DataObject) ViewStyle {
params := Params{}
for i := 0; i < obj.PropertyCount(); i++ {
if node := obj.Property(i); node != nil {
switch node.Type() {
case ArrayNode:
params[node.Tag()] = node.ArrayElements()
case ObjectNode:
params[node.Tag()] = node.Object()
default:
params[node.Tag()] = node.Text()
}
}
}
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return NewViewStyle(params)
}
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for i := 0; i < count; i++ {
if d := data.Property(i); d != nil {
switch tag := d.Tag(); tag {
case "constants":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.constants[prop.Tag()] = prop.Text()
}
}
}
}
case "constants:touch":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.touchConstants[prop.Tag()] = prop.Text()
}
}
}
}
case "colors":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.colors[prop.Tag()] = prop.Text()
}
}
}
}
case "colors:dark":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.darkColors[prop.Tag()] = prop.Text()
}
}
}
}
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case "images":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.images[prop.Tag()] = prop.Text()
}
}
}
}
case "images:dark":
if d.Type() == ObjectNode {
if obj := d.Object(); obj != nil {
objCount := obj.PropertyCount()
for k := 0; k < objCount; k++ {
if prop := obj.Property(k); prop != nil && prop.Type() == TextNode {
theme.darkImages[prop.Tag()] = prop.Text()
}
}
}
}
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case "styles":
if d.Type() == ArrayNode {
arraySize := d.ArraySize()
for k := 0; k < arraySize; k++ {
if element := d.ArrayElement(k); element != nil && element.IsObject() {
if obj := element.Object(); obj != nil {
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theme.styles[obj.Tag()] = objToStyle(obj)
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}
}
}
}
default:
if d.Type() == ArrayNode && strings.HasPrefix(tag, "styles:") {
if rule, ok := parseMediaRule(tag); ok {
arraySize := d.ArraySize()
for k := 0; k < arraySize; k++ {
if element := d.ArrayElement(k); element != nil && element.IsObject() {
if obj := element.Object(); obj != nil {
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rule.styles[obj.Tag()] = objToStyle(obj)
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}
}
}
theme.mediaStyles = append(theme.mediaStyles, rule)
}
}
}
}
}
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theme.sortMediaStyles()
return true
}
func (theme *theme) sortMediaStyles() {
if len(theme.mediaStyles) > 1 {
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sort.SliceStable(theme.mediaStyles, func(i, j int) bool {
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if theme.mediaStyles[i].orientation != theme.mediaStyles[j].orientation {
return theme.mediaStyles[i].orientation < theme.mediaStyles[j].orientation
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}
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if theme.mediaStyles[i].maxWidth != theme.mediaStyles[j].maxWidth {
return theme.mediaStyles[i].maxWidth < theme.mediaStyles[j].maxWidth
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}
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return theme.mediaStyles[i].maxHeight < theme.mediaStyles[j].maxHeight
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})
}
}
func (theme *theme) constant(tag string, touchUI bool) string {
result := ""
if touchUI {
if value, ok := theme.touchConstants[tag]; ok {
result = value
}
}
if result == "" {
if value, ok := theme.constants[tag]; ok {
result = value
}
}
return result
}
func (theme *theme) color(tag string, darkUI bool) string {
result := ""
if darkUI {
if value, ok := theme.darkColors[tag]; ok {
result = value
}
}
if result == "" {
if value, ok := theme.colors[tag]; ok {
result = value
}
}
return result
}
func (theme *theme) image(tag string, darkUI bool) string {
result := ""
if darkUI {
if value, ok := theme.darkImages[tag]; ok {
result = value
}
}
if result == "" {
if value, ok := theme.images[tag]; ok {
result = value
}
}
return result
}
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func (theme *theme) style(tag string) ViewStyle {
if style, ok := theme.styles[tag]; ok {
return style
}
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return nil
}
func (theme *theme) String() string {
buffer := allocStringBuilder()
defer freeStringBuilder(buffer)
writeString := func(text string) {
if strings.ContainsAny(text, " \t\n\r\\\"'`,;{}[]()") {
replace := []struct{ old, new string }{
{old: "\\", new: `\\`},
{old: "\t", new: `\t`},
{old: "\r", new: `\r`},
{old: "\n", new: `\n`},
{old: "\"", new: `\"`},
}
for _, s := range replace {
text = strings.Replace(text, s.old, s.new, -1)
}
buffer.WriteRune('"')
buffer.WriteString(text)
buffer.WriteRune('"')
} else {
buffer.WriteString(text)
}
}
writeConstants := func(tag string, constants map[string]string) {
count := len(constants)
if count == 0 {
return
}
buffer.WriteString("\t")
buffer.WriteString(tag)
buffer.WriteString(" = _{\n")
tags := make([]string, 0, count)
for name := range constants {
tags = append(tags, name)
}
sort.Strings(tags)
for _, name := range tags {
if value, ok := constants[name]; ok && value != "" {
buffer.WriteString("\t\t")
writeString(name)
buffer.WriteString(" = ")
writeString(value)
buffer.WriteString(",\n")
}
}
buffer.WriteString("\t},\n")
}
buffer.WriteString("theme {\n")
writeConstants("colors", theme.colors)
writeConstants("colors:dark", theme.darkColors)
writeConstants("images", theme.images)
writeConstants("images:dark", theme.darkImages)
writeConstants("constants", theme.constants)
writeConstants("constants:touch", theme.touchConstants)
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writeStyles := func(orientation, maxWidth, maxHeihgt int, styles map[string]ViewStyle) bool {
count := len(styles)
if count == 0 {
return false
}
tags := make([]string, 0, count)
for name := range styles {
tags = append(tags, name)
}
sort.Strings(tags)
buffer.WriteString("\tstyles")
switch orientation {
case PortraitMedia:
buffer.WriteString(":portrait")
case LandscapeMedia:
buffer.WriteString(":landscape")
}
if maxWidth > 0 {
buffer.WriteString(fmt.Sprintf(":width%d", maxWidth))
}
if maxHeihgt > 0 {
buffer.WriteString(fmt.Sprintf(":heihgt%d", maxHeihgt))
}
buffer.WriteString(" = [\n")
for _, tag := range tags {
if style, ok := styles[tag]; ok {
buffer.WriteString("\t\t")
writeViewStyle(tag, style, buffer, "\t\t")
buffer.WriteString(",")
}
}
buffer.WriteString("\t],\n")
return true
}
writeStyles(0, 0, 0, theme.styles)
for _, media := range theme.mediaStyles {
writeStyles(media.orientation, media.maxWidth, media.maxHeight, media.styles)
}
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buffer.WriteString("}\n")
return buffer.String()
}