mirror of https://github.com/anoshenko/rui.git
423 lines
11 KiB
Go
423 lines
11 KiB
Go
package rui
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// ViewStyle interface of the style of view
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type ViewStyle interface {
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Properties
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cssViewStyle(buffer cssBuilder, session Session, view View)
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}
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type viewStyle struct {
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propertyList
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//transitions map[string]ViewTransition
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}
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// Range defines range limits. The First and Last value are included in the range
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type Range struct {
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First, Last int
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}
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// String returns a string representation of the Range struct
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func (r Range) String() string {
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if r.First == r.Last {
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return fmt.Sprintf("%d", r.First)
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}
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return fmt.Sprintf("%d:%d", r.First, r.Last)
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}
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func (r *Range) setValue(value string) bool {
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var err error
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if strings.Contains(value, ":") {
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values := strings.Split(value, ":")
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if len(values) != 2 {
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ErrorLog("Invalid range value: " + value)
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return false
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}
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if r.First, err = strconv.Atoi(strings.Trim(values[0], " \t\n\r")); err != nil {
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ErrorLog(`Invalid first range value "` + value + `" (` + err.Error() + ")")
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return false
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}
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if r.Last, err = strconv.Atoi(strings.Trim(values[1], " \t\n\r")); err != nil {
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ErrorLog(`Invalid last range value "` + value + `" (` + err.Error() + ")")
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return false
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}
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return true
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}
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if r.First, err = strconv.Atoi(value); err != nil {
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ErrorLog(`Invalid range value "` + value + `" (` + err.Error() + ")")
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return false
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}
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r.Last = r.First
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return true
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}
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func (style *viewStyle) init() {
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style.propertyList.init()
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//style.shadows = []ViewShadow{}
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//style.transitions = map[string]ViewTransition{}
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}
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// NewViewStyle create new ViewStyle object
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func NewViewStyle(params Params) ViewStyle {
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style := new(viewStyle)
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style.init()
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for tag, value := range params {
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style.Set(tag, value)
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}
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return style
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}
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func (style *viewStyle) cssTextDecoration(session Session) string {
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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noDecoration := false
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if strikethrough, ok := boolProperty(style, Strikethrough, session); ok {
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if strikethrough {
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buffer.WriteString("line-through")
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}
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noDecoration = true
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}
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if overline, ok := boolProperty(style, Overline, session); ok {
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if overline {
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if buffer.Len() > 0 {
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buffer.WriteRune(' ')
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}
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buffer.WriteString("overline")
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}
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noDecoration = true
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}
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if underline, ok := boolProperty(style, Underline, session); ok {
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if underline {
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if buffer.Len() > 0 {
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buffer.WriteRune(' ')
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}
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buffer.WriteString("underline")
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}
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noDecoration = true
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}
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if buffer.Len() == 0 && noDecoration {
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return "none"
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}
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return buffer.String()
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}
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func split4Values(text string) []string {
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values := strings.Split(text, ",")
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count := len(values)
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switch count {
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case 1, 4:
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return values
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case 2:
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if strings.Trim(values[1], " \t\r\n") == "" {
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return values[:1]
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}
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case 5:
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if strings.Trim(values[4], " \t\r\n") != "" {
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return values[:4]
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}
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}
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return []string{}
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}
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func (style *viewStyle) backgroundCSS(view View) string {
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if value, ok := style.properties[Background]; ok {
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if backgrounds, ok := value.([]BackgroundElement); ok {
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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for _, background := range backgrounds {
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if value := background.cssStyle(view); value != "" {
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if buffer.Len() > 0 {
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buffer.WriteString(", ")
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}
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buffer.WriteString(value)
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}
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}
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if buffer.Len() > 0 {
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return buffer.String()
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}
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}
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}
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return ""
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}
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func (style *viewStyle) cssViewStyle(builder cssBuilder, session Session, view View) {
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if margin, ok := boundsProperty(style, Margin, session); ok {
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margin.cssValue(Margin, builder)
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}
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if padding, ok := boundsProperty(style, Padding, session); ok {
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padding.cssValue(Padding, builder)
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}
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if border := getBorder(style, Border); border != nil {
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border.cssStyle(builder, session)
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border.cssWidth(builder, session)
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border.cssColor(builder, session)
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}
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radius := getRadius(style, session)
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radius.cssValue(builder)
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if outline := getOutline(style); outline != nil {
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outline.ViewOutline(session).cssValue(builder)
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}
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if z, ok := intProperty(style, ZIndex, session, 0); ok {
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builder.add(ZIndex, strconv.Itoa(z))
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}
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if opacity, ok := floatProperty(style, Opacity, session, 1.0); ok && opacity >= 0 && opacity <= 1 {
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builder.add(Opacity, strconv.FormatFloat(opacity, 'f', 3, 32))
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}
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if n, ok := intProperty(style, ColumnCount, session, 0); ok && n > 0 {
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builder.add(ColumnCount, strconv.Itoa(n))
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}
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for _, tag := range []string{
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Width, Height, MinWidth, MinHeight, MaxWidth, MaxHeight, Left, Right, Top, Bottom,
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TextSize, TextIndent, LetterSpacing, WordSpacing, LineHeight, TextLineThickness,
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GridRowGap, GridColumnGap, ColumnGap, ColumnWidth} {
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if size, ok := sizeProperty(style, tag, session); ok && size.Type != Auto {
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cssTag, ok := sizeProperties[tag]
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if !ok {
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cssTag = tag
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}
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builder.add(cssTag, size.cssString(""))
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}
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}
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colorProperties := []struct{ property, cssTag string }{
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{BackgroundColor, BackgroundColor},
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{TextColor, "color"},
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{TextLineColor, "text-decoration-color"},
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}
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for _, p := range colorProperties {
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if color, ok := colorProperty(style, p.property, session); ok && color != 0 {
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builder.add(p.cssTag, color.cssString())
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}
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}
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if value, ok := enumProperty(style, BackgroundClip, session, 0); ok {
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builder.add(BackgroundClip, enumProperties[BackgroundClip].values[value])
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}
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if background := style.backgroundCSS(view); background != "" {
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builder.add("background", background)
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}
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if font, ok := stringProperty(style, FontName, session); ok && font != "" {
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builder.add(`font-family`, font)
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}
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writingMode := 0
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for _, tag := range []string{
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TextAlign, TextTransform, TextWeight, TextLineStyle, WritingMode, TextDirection,
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VerticalTextOrientation, CellVerticalAlign, CellHorizontalAlign, Cursor, WhiteSpace,
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WordBreak, TextOverflow, Float, TableVerticalAlign} {
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if data, ok := enumProperties[tag]; ok {
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if tag != VerticalTextOrientation || (writingMode != VerticalLeftToRight && writingMode != VerticalRightToLeft) {
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if value, ok := enumProperty(style, tag, session, 0); ok {
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cssValue := data.values[value]
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if cssValue != "" {
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builder.add(data.cssTag, cssValue)
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}
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if tag == WritingMode {
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writingMode = value
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}
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}
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}
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}
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}
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for _, prop := range []struct{ tag, cssTag, off, on string }{
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{tag: Italic, cssTag: "font-style", off: "normal", on: "italic"},
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{tag: SmallCaps, cssTag: "font-variant", off: "normal", on: "small-caps"},
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} {
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if flag, ok := boolProperty(style, prop.tag, session); ok {
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if flag {
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builder.add(prop.cssTag, prop.on)
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} else {
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builder.add(prop.cssTag, prop.off)
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}
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}
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}
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if text := style.cssTextDecoration(session); text != "" {
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builder.add("text-decoration", text)
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}
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if css := shadowCSS(style, Shadow, session); css != "" {
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builder.add("box-shadow", css)
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}
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if css := shadowCSS(style, TextShadow, session); css != "" {
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builder.add("text-shadow", css)
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}
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if value, ok := style.properties[ColumnSeparator]; ok {
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if separator, ok := value.(ColumnSeparatorProperty); ok {
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if css := separator.cssValue(session); css != "" {
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builder.add("column-rule", css)
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}
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}
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}
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if avoid, ok := boolProperty(style, AvoidBreak, session); ok {
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if avoid {
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builder.add("break-inside", "avoid")
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} else {
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builder.add("break-inside", "auto")
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}
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}
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wrap, _ := enumProperty(style, Wrap, session, 0)
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orientation, ok := getOrientation(style, session)
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if ok || wrap > 0 {
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cssText := enumProperties[Orientation].cssValues[orientation]
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switch wrap {
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case WrapOn:
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cssText += " wrap"
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case WrapReverse:
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cssText += " wrap-reverse"
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}
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builder.add(`flex-flow`, cssText)
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}
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rows := (orientation == StartToEndOrientation || orientation == EndToStartOrientation)
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var hAlignTag, vAlignTag string
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if rows {
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hAlignTag = `justify-content`
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vAlignTag = `align-items`
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} else {
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hAlignTag = `align-items`
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vAlignTag = `justify-content`
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}
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if align, ok := enumProperty(style, HorizontalAlign, session, LeftAlign); ok {
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switch align {
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case LeftAlign:
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if (!rows && wrap == WrapReverse) || orientation == EndToStartOrientation {
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builder.add(hAlignTag, `flex-end`)
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} else {
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builder.add(hAlignTag, `flex-start`)
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}
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case RightAlign:
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if (!rows && wrap == WrapReverse) || orientation == EndToStartOrientation {
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builder.add(hAlignTag, `flex-start`)
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} else {
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builder.add(hAlignTag, `flex-end`)
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}
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case CenterAlign:
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builder.add(hAlignTag, `center`)
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case StretchAlign:
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if rows {
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builder.add(hAlignTag, `space-between`)
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} else {
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builder.add(hAlignTag, `stretch`)
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}
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}
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}
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if align, ok := enumProperty(style, VerticalAlign, session, LeftAlign); ok {
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switch align {
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case TopAlign:
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if (rows && wrap == WrapReverse) || orientation == BottomUpOrientation {
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builder.add(vAlignTag, `flex-end`)
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} else {
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builder.add(vAlignTag, `flex-start`)
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}
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case BottomAlign:
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if (rows && wrap == WrapReverse) || orientation == BottomUpOrientation {
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builder.add(vAlignTag, `flex-start`)
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} else {
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builder.add(vAlignTag, `flex-end`)
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}
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case CenterAlign:
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builder.add(vAlignTag, `center`)
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case StretchAlign:
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if rows {
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builder.add(hAlignTag, `stretch`)
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} else {
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builder.add(hAlignTag, `space-between`)
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}
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}
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}
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if r, ok := rangeProperty(style, Row, session); ok {
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builder.add("grid-row-start", strconv.Itoa(r.First+1))
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builder.add("grid-row-end", strconv.Itoa(r.Last+2))
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}
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if r, ok := rangeProperty(style, Column, session); ok {
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builder.add("grid-column-start", strconv.Itoa(r.First+1))
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builder.add("grid-column-end", strconv.Itoa(r.Last+2))
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}
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if text := style.gridCellSizesCSS(CellWidth, session); text != "" {
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builder.add(`grid-template-columns`, text)
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}
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if text := style.gridCellSizesCSS(CellHeight, session); text != "" {
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builder.add(`grid-template-rows`, text)
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}
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style.writeViewTransformCSS(builder, session)
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if clip := getClipShape(style, Clip, session); clip != nil && clip.valid(session) {
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builder.add(`clip-path`, clip.cssStyle(session))
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}
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if clip := getClipShape(style, ShapeOutside, session); clip != nil && clip.valid(session) {
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builder.add(`shape-outside`, clip.cssStyle(session))
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}
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if value := style.getRaw(Filter); value != nil {
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if filter, ok := value.(ViewFilter); ok {
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if text := filter.cssStyle(session); text != "" {
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builder.add(`filter`, text)
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}
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}
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}
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/*
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if len(style.transitions) > 0 {
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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for property, transition := range style.transitions {
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if buffer.Len() > 0 {
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buffer.WriteString(`, `)
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}
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buffer.WriteString(property)
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transition.cssWrite(buffer, session)
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}
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if buffer.Len() > 0 {
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builder.add(`transition`, buffer.String())
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}
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}
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*/
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// TODO text-shadow
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}
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