mirror of https://github.com/anoshenko/rui.git
560 lines
15 KiB
Go
560 lines
15 KiB
Go
package rui
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import (
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"fmt"
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"strings"
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)
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// Constants related to [GridLayout] specific properties and events
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const (
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// CellVerticalAlign is the constant for "cell-vertical-align" property tag.
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//
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// Used by `GridLayout`, `SvgImageView`.
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//
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// Usage in `GridLayout`:
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// Sets the default vertical alignment of `GridLayout` children within the cell they are occupying.
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//
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// Supported types: `int`, `string`.
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//
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// Values:
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// `0`(`TopAlign`) or "top" - Top alignment.
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// `1`(`BottomAlign`) or "bottom" - Bottom alignment.
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// `2`(`CenterAlign`) or "center" - Center alignment.
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// `3`(`StretchAlign`) or "stretch" - Full height stretch.
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//
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// Usage in `SvgImageView`:
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// Same as "vertical-align".
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CellVerticalAlign = "cell-vertical-align"
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// CellHorizontalAlign is the constant for "cell-horizontal-align" property tag.
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//
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// Used by `GridLayout`, `SvgImageView`.
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//
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// Usage in `GridLayout`:
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// Sets the default horizontal alignment of `GridLayout` children within the occupied cell.
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//
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// Supported types: `int`, `string`.
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//
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// Values:
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// `0`(`LeftAlign`) or "left" - Left alignment.
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// `1`(`RightAlign`) or "right" - Right alignment.
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// `2`(`CenterAlign`) or "center" - Center alignment.
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// `3`(`StretchAlign`) or "stretch" - Full width stretch.
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//
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// Usage in `SvgImageView`:
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// Same as "horizontal-align".
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CellHorizontalAlign = "cell-horizontal-align"
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// CellVerticalSelfAlign is the constant for "cell-vertical-self-align" property tag.
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//
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// Used by `GridLayout`.
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// Sets the vertical alignment of `GridLayout` children within the cell they are occupying. The property is set for the
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// child view of `GridLayout`.
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//
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// Supported types: `int`, `string`.
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//
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// Values:
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// `0`(`TopAlign`) or "top" - Top alignment.
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// `1`(`BottomAlign`) or "bottom" - Bottom alignment.
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// `2`(`CenterAlign`) or "center" - Center alignment.
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// `3`(`StretchAlign`) or "stretch" - Full height stretch.
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CellVerticalSelfAlign = "cell-vertical-self-align"
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// CellHorizontalSelfAlign is the constant for "cell-horizontal-self-align" property tag.
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//
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// Used by `GridLayout`.
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// Sets the horizontal alignment of `GridLayout` children within the occupied cell. The property is set for the child view
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// of `GridLayout`.
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//
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// Supported types: `int`, `string`.
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//
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// Values:
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// `0`(`LeftAlign`) or "left" - Left alignment.
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// `1`(`RightAlign`) or "right" - Right alignment.
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// `2`(`CenterAlign`) or "center" - Center alignment.
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// `3`(`StretchAlign`) or "stretch" - Full width stretch.
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CellHorizontalSelfAlign = "cell-horizontal-self-align"
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)
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// GridAdapter is an interface to define [GridLayout] content. [GridLayout] will query interface functions to populate
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// its content
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type GridAdapter interface {
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// GridColumnCount returns the number of columns in the grid
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GridColumnCount() int
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// GridRowCount returns the number of rows in the grid
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GridRowCount() int
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// GridCellContent creates a View at the given cell
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GridCellContent(row, column int, session Session) View
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}
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// GridCellColumnSpanAdapter implements the optional method of the [GridAdapter] interface
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type GridCellColumnSpanAdapter interface {
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// GridCellColumnSpan returns the number of columns that a cell spans.
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// Values less than 1 are ignored.
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GridCellColumnSpan(row, column int) int
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}
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// GridCellColumnSpanAdapter implements the optional method of the [GridAdapter] interface
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type GridCellRowSpanAdapter interface {
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// GridCellRowSpan returns the number of rows that a cell spans
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// Values less than 1 are ignored.
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GridCellRowSpan(row, column int) int
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}
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// GridLayout represents a GridLayout view
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type GridLayout interface {
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ViewsContainer
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// UpdateContent updates child Views if the "content" property value is set to GridAdapter,
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// otherwise does nothing
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UpdateGridContent()
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}
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type gridLayoutData struct {
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viewsContainerData
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adapter GridAdapter
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}
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// NewGridLayout create new GridLayout object and return it
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func NewGridLayout(session Session, params Params) GridLayout {
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view := new(gridLayoutData)
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view.init(session)
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setInitParams(view, params)
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return view
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}
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func newGridLayout(session Session) View {
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return NewGridLayout(session, nil)
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}
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// Init initialize fields of GridLayout by default values
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func (gridLayout *gridLayoutData) init(session Session) {
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gridLayout.viewsContainerData.init(session)
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gridLayout.tag = "GridLayout"
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gridLayout.systemClass = "ruiGridLayout"
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gridLayout.adapter = nil
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}
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func (gridLayout *gridLayoutData) String() string {
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return getViewString(gridLayout, nil)
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}
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func (style *viewStyle) setGridCellSize(tag string, value any) bool {
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setValues := func(values []string) bool {
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count := len(values)
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if count > 1 {
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sizes := make([]any, count)
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for i, val := range values {
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val = strings.Trim(val, " \t\n\r")
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if isConstantName(val) {
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sizes[i] = val
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} else if fn := parseSizeFunc(val); fn != nil {
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sizes[i] = SizeUnit{Type: SizeFunction, Function: fn}
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} else if size, err := stringToSizeUnit(val); err == nil {
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sizes[i] = size
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} else {
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invalidPropertyValue(tag, value)
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return false
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}
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}
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style.properties[tag] = sizes
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} else if isConstantName(values[0]) {
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style.properties[tag] = values[0]
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} else if size, err := stringToSizeUnit(values[0]); err == nil {
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style.properties[tag] = size
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} else {
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invalidPropertyValue(tag, value)
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return false
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}
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return true
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}
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switch tag {
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case CellWidth, CellHeight:
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switch value := value.(type) {
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case SizeUnit, []SizeUnit:
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style.properties[tag] = value
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case string:
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if !setValues(strings.Split(value, ",")) {
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return false
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}
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case []string:
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if !setValues(value) {
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return false
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}
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case []DataValue:
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count := len(value)
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if count == 0 {
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invalidPropertyValue(tag, value)
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return false
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}
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values := make([]string, count)
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for i, val := range value {
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if val.IsObject() {
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invalidPropertyValue(tag, value)
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return false
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}
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values[i] = val.Value()
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}
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if !setValues(values) {
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return false
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}
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case []any:
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count := len(value)
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if count == 0 {
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invalidPropertyValue(tag, value)
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return false
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}
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sizes := make([]any, count)
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for i, val := range value {
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switch val := val.(type) {
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case SizeUnit:
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sizes[i] = val
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case string:
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if isConstantName(val) {
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sizes[i] = val
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} else if size, err := stringToSizeUnit(val); err == nil {
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sizes[i] = size
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} else {
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invalidPropertyValue(tag, value)
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return false
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}
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default:
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invalidPropertyValue(tag, value)
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return false
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}
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}
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style.properties[tag] = sizes
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default:
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notCompatibleType(tag, value)
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return false
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}
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return true
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}
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return false
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}
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func (style *viewStyle) gridCellSizesCSS(tag string, session Session) string {
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switch cellSize := gridCellSizes(style, tag, session); len(cellSize) {
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case 0:
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case 1:
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if cellSize[0].Type != Auto {
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return `repeat(auto-fill, ` + cellSize[0].cssString(`auto`, session) + `)`
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}
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default:
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allAuto := true
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allEqual := true
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for i, size := range cellSize {
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if size.Type != Auto {
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allAuto = false
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}
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if i > 0 && !size.Equal(cellSize[0]) {
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allEqual = false
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}
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}
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if !allAuto {
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if allEqual {
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return fmt.Sprintf(`repeat(%d, %s)`, len(cellSize), cellSize[0].cssString(`auto`, session))
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}
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buffer := allocStringBuilder()
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defer freeStringBuilder(buffer)
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for _, size := range cellSize {
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buffer.WriteRune(' ')
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buffer.WriteString(size.cssString(`auto`, session))
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}
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return buffer.String()
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}
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}
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return ""
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}
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func (gridLayout *gridLayoutData) normalizeTag(tag string) string {
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tag = strings.ToLower(tag)
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switch tag {
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case VerticalAlign:
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return CellVerticalAlign
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case HorizontalAlign:
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return CellHorizontalAlign
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case "row-gap":
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return GridRowGap
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case ColumnGap:
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return GridColumnGap
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}
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return tag
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}
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func (gridLayout *gridLayoutData) Get(tag string) any {
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return gridLayout.get(gridLayout.normalizeTag(tag))
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}
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func (gridLayout *gridLayoutData) get(tag string) any {
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if tag == Gap {
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rowGap := GetGridRowGap(gridLayout)
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columnGap := GetGridColumnGap(gridLayout)
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if rowGap.Equal(columnGap) {
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return rowGap
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}
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return AutoSize()
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}
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return gridLayout.viewsContainerData.get(tag)
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}
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func (gridLayout *gridLayoutData) Remove(tag string) {
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gridLayout.remove(gridLayout.normalizeTag(tag))
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}
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func (gridLayout *gridLayoutData) remove(tag string) {
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switch tag {
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case Gap:
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gridLayout.remove(GridRowGap)
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gridLayout.remove(GridColumnGap)
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gridLayout.propertyChangedEvent(Gap)
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return
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case Content:
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gridLayout.adapter = nil
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}
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gridLayout.viewsContainerData.remove(tag)
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if gridLayout.created {
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switch tag {
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case CellWidth:
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gridLayout.session.updateCSSProperty(gridLayout.htmlID(), `grid-template-columns`,
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gridLayout.gridCellSizesCSS(CellWidth, gridLayout.session))
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case CellHeight:
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gridLayout.session.updateCSSProperty(gridLayout.htmlID(), `grid-template-rows`,
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gridLayout.gridCellSizesCSS(CellHeight, gridLayout.session))
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}
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}
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}
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func (gridLayout *gridLayoutData) Set(tag string, value any) bool {
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return gridLayout.set(gridLayout.normalizeTag(tag), value)
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}
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func (gridLayout *gridLayoutData) set(tag string, value any) bool {
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if value == nil {
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gridLayout.remove(tag)
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return true
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}
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switch tag {
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case Gap:
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return gridLayout.set(GridRowGap, value) && gridLayout.set(GridColumnGap, value)
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case Content:
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if adapter, ok := value.(GridAdapter); ok {
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gridLayout.adapter = adapter
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gridLayout.UpdateGridContent()
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return true
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}
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gridLayout.adapter = nil
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}
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if gridLayout.viewsContainerData.set(tag, value) {
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if gridLayout.created {
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switch tag {
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case CellWidth:
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gridLayout.session.updateCSSProperty(gridLayout.htmlID(), `grid-template-columns`,
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gridLayout.gridCellSizesCSS(CellWidth, gridLayout.session))
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case CellHeight:
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gridLayout.session.updateCSSProperty(gridLayout.htmlID(), `grid-template-rows`,
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gridLayout.gridCellSizesCSS(CellHeight, gridLayout.session))
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}
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}
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return true
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}
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return false
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}
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func (gridLayout *gridLayoutData) UpdateGridContent() {
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if adapter := gridLayout.adapter; adapter != nil {
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gridLayout.views = []View{}
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session := gridLayout.session
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htmlID := gridLayout.htmlID()
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isDisabled := IsDisabled(gridLayout)
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var columnSpan GridCellColumnSpanAdapter = nil
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if span, ok := adapter.(GridCellColumnSpanAdapter); ok {
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columnSpan = span
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}
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var rowSpan GridCellRowSpanAdapter = nil
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if span, ok := adapter.(GridCellRowSpanAdapter); ok {
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rowSpan = span
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}
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width := adapter.GridColumnCount()
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height := adapter.GridRowCount()
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for column := 0; column < width; column++ {
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for row := 0; row < height; row++ {
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if view := adapter.GridCellContent(row, column, session); view != nil {
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view.setParentID(htmlID)
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columnCount := 1
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if columnSpan != nil {
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columnCount = columnSpan.GridCellColumnSpan(row, column)
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}
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if columnCount > 1 {
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view.Set(Column, Range{First: column, Last: column + columnCount - 1})
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} else {
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view.Set(Column, column)
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}
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rowCount := 1
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if rowSpan != nil {
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rowCount = rowSpan.GridCellRowSpan(row, column)
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}
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if rowCount > 1 {
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view.Set(Row, Range{First: row, Last: row + rowCount - 1})
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} else {
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view.Set(Row, row)
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}
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if isDisabled {
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view.Set(Disabled, true)
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}
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gridLayout.views = append(gridLayout.views, view)
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}
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}
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}
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if gridLayout.created {
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updateInnerHTML(htmlID, session)
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}
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gridLayout.propertyChangedEvent(Content)
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}
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}
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func gridCellSizes(properties Properties, tag string, session Session) []SizeUnit {
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if value := properties.Get(tag); value != nil {
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switch value := value.(type) {
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case []SizeUnit:
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return value
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case SizeUnit:
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return []SizeUnit{value}
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case []any:
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result := make([]SizeUnit, len(value))
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for i, val := range value {
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result[i] = AutoSize()
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switch val := val.(type) {
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case SizeUnit:
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result[i] = val
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case string:
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if text, ok := session.resolveConstants(val); ok {
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result[i], _ = stringToSizeUnit(text)
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}
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}
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}
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return result
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case string:
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if text, ok := session.resolveConstants(value); ok {
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values := strings.Split(text, ",")
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result := make([]SizeUnit, len(values))
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for i, val := range values {
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result[i], _ = stringToSizeUnit(val)
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}
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return result
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}
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}
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}
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return []SizeUnit{}
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}
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/*
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func (gridLayout *gridLayoutData) cssStyle(self View, builder cssBuilder) {
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gridLayout.viewsContainerData.cssStyle(self, builder)
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}
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*/
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// GetCellVerticalAlign returns the vertical align of a GridLayout cell content: TopAlign (0), BottomAlign (1), CenterAlign (2), StretchAlign (3)
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetCellVerticalAlign(view View, subviewID ...string) int {
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return enumStyledProperty(view, subviewID, CellVerticalAlign, StretchAlign, false)
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}
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// GetCellHorizontalAlign returns the vertical align of a GridLayout cell content: LeftAlign (0), RightAlign (1), CenterAlign (2), StretchAlign (3)
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetCellHorizontalAlign(view View, subviewID ...string) int {
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return enumStyledProperty(view, subviewID, CellHorizontalAlign, StretchAlign, false)
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}
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// GetGridAutoFlow returns the value of the "grid-auto-flow" property
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetGridAutoFlow(view View, subviewID ...string) int {
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return enumStyledProperty(view, subviewID, GridAutoFlow, 0, false)
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}
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// GetCellWidth returns the width of a GridLayout cell. If the result is an empty array, then the width is not set.
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// If the result is a single value array, then the width of all cell is equal.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetCellWidth(view View, subviewID ...string) []SizeUnit {
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if len(subviewID) > 0 && subviewID[0] != "" {
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view = ViewByID(view, subviewID[0])
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}
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if view != nil {
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return gridCellSizes(view, CellWidth, view.Session())
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}
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return []SizeUnit{}
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}
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// GetCellHeight returns the height of a GridLayout cell. If the result is an empty array, then the height is not set.
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// If the result is a single value array, then the height of all cell is equal.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetCellHeight(view View, subviewID ...string) []SizeUnit {
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if len(subviewID) > 0 && subviewID[0] != "" {
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view = ViewByID(view, subviewID[0])
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}
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if view != nil {
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return gridCellSizes(view, CellHeight, view.Session())
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}
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return []SizeUnit{}
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}
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// GetGridRowGap returns the gap between GridLayout rows.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
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func GetGridRowGap(view View, subviewID ...string) SizeUnit {
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return sizeStyledProperty(view, subviewID, GridRowGap, false)
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}
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// GetGridColumnGap returns the gap between GridLayout columns.
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// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
|
||
func GetGridColumnGap(view View, subviewID ...string) SizeUnit {
|
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return sizeStyledProperty(view, subviewID, GridColumnGap, false)
|
||
}
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