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rui/resizable.go

471 lines
12 KiB
Go

package rui
import (
"fmt"
"strconv"
"strings"
)
const (
// Side is the constant for the "side" property tag.
// The "side" int property determines which side of the container is used to resize.
// The value of property is or-combination of TopSide (1), RightSide (2), BottomSide (4), and LeftSide (8)
Side = "side"
// ResizeBorderWidth is the constant for the "resize-border-width" property tag.
// The "ResizeBorderWidth" SizeUnit property determines the width of the resizing border
ResizeBorderWidth = "resize-border-width"
// CellVerticalAlign is the constant for the "cell-vertical-align" property tag.
CellVerticalAlign = "cell-vertical-align"
// CellHorizontalAlign is the constant for the "cell-horizontal-align" property tag.
CellHorizontalAlign = "cell-horizontal-align"
// TopSide is value of the "side" property: the top side is used to resize
TopSide = 1
// RightSide is value of the "side" property: the right side is used to resize
RightSide = 2
// BottomSide is value of the "side" property: the bottom side is used to resize
BottomSide = 4
// LeftSide is value of the "side" property: the left side is used to resize
LeftSide = 8
// AllSides is value of the "side" property: all sides is used to resize
AllSides = TopSide | RightSide | BottomSide | LeftSide
)
// Resizable - grid-container of View
type Resizable interface {
View
ParanetView
}
type resizableData struct {
viewData
content []View
}
// NewResizable create new Resizable object and return it
func NewResizable(session Session, params Params) Resizable {
view := new(resizableData)
view.Init(session)
setInitParams(view, params)
return view
}
func newResizable(session Session) View {
return NewResizable(session, nil)
}
func (resizable *resizableData) Init(session Session) {
resizable.viewData.Init(session)
resizable.tag = "Resizable"
resizable.systemClass = "ruiGridLayout"
resizable.content = []View{}
}
func (resizable *resizableData) Views() []View {
return resizable.content
}
func (resizable *resizableData) Remove(tag string) {
resizable.remove(strings.ToLower(tag))
}
func (resizable *resizableData) remove(tag string) {
switch tag {
case Side:
oldSide := resizable.getSide()
delete(resizable.properties, Side)
if oldSide != resizable.getSide() {
if resizable.created {
updateInnerHTML(resizable.htmlID(), resizable.Session())
resizable.updateResizeBorderWidth()
}
resizable.propertyChangedEvent(tag)
}
case ResizeBorderWidth:
w := resizable.resizeBorderWidth()
delete(resizable.properties, ResizeBorderWidth)
if !w.Equal(resizable.resizeBorderWidth()) {
resizable.updateResizeBorderWidth()
resizable.propertyChangedEvent(tag)
}
case Content:
if len(resizable.content) > 0 {
resizable.content = []View{}
if resizable.created {
updateInnerHTML(resizable.htmlID(), resizable.Session())
}
resizable.propertyChangedEvent(tag)
}
default:
resizable.viewData.remove(tag)
}
}
func (resizable *resizableData) Set(tag string, value interface{}) bool {
return resizable.set(strings.ToLower(tag), value)
}
func (resizable *resizableData) set(tag string, value interface{}) bool {
if value == nil {
resizable.remove(tag)
return true
}
switch tag {
case Side:
oldSide := resizable.getSide()
if !resizable.setSide(value) {
notCompatibleType(tag, value)
return false
}
if oldSide != resizable.getSide() {
if resizable.created {
updateInnerHTML(resizable.htmlID(), resizable.Session())
resizable.updateResizeBorderWidth()
}
resizable.propertyChangedEvent(tag)
}
return true
case ResizeBorderWidth:
w := resizable.resizeBorderWidth()
ok := resizable.setSizeProperty(tag, value)
if ok && !w.Equal(resizable.resizeBorderWidth()) {
resizable.updateResizeBorderWidth()
resizable.propertyChangedEvent(tag)
}
return ok
case Content:
var newContent View = nil
switch value := value.(type) {
case string:
newContent = NewTextView(resizable.Session(), Params{Text: value})
case View:
newContent = value
case DataObject:
if view := CreateViewFromObject(resizable.Session(), value); view != nil {
newContent = view
} else {
return false
}
default:
notCompatibleType(tag, value)
return false
}
if len(resizable.content) == 0 {
resizable.content = []View{newContent}
} else {
resizable.content[0] = newContent
}
if resizable.created {
updateInnerHTML(resizable.htmlID(), resizable.Session())
}
resizable.propertyChangedEvent(tag)
return true
case CellWidth, CellHeight, GridRowGap, GridColumnGap, CellVerticalAlign, CellHorizontalAlign:
ErrorLogF(`Not supported "%s" property`, tag)
return false
}
return resizable.viewData.set(tag, value)
}
func (resizable *resizableData) Get(tag string) interface{} {
return resizable.get(strings.ToLower(tag))
}
func (resizable *resizableData) getSide() int {
if value := resizable.getRaw(Side); value != nil {
switch value := value.(type) {
case string:
if value, ok := resizable.session.resolveConstants(value); ok {
validValues := map[string]int{
"top": TopSide,
"right": RightSide,
"bottom": BottomSide,
"left": LeftSide,
"all": AllSides,
}
if strings.Contains(value, "|") {
values := strings.Split(value, "|")
sides := 0
for _, val := range values {
if n, err := strconv.Atoi(val); err == nil {
if n < 1 || n > AllSides {
return AllSides
}
sides |= n
} else if n, ok := validValues[val]; ok {
sides |= n
} else {
return AllSides
}
}
return sides
} else if n, err := strconv.Atoi(value); err == nil {
if n >= 1 || n <= AllSides {
return n
}
} else if n, ok := validValues[value]; ok {
return n
}
}
case int:
if value >= 1 && value <= AllSides {
return value
}
}
}
return AllSides
}
func (resizable *resizableData) setSide(value interface{}) bool {
switch value := value.(type) {
case string:
if n, err := strconv.Atoi(value); err == nil {
if n >= 1 && n <= AllSides {
resizable.properties[Side] = n
return true
}
return false
}
validValues := map[string]int{
"top": TopSide,
"right": RightSide,
"bottom": BottomSide,
"left": LeftSide,
"all": AllSides,
}
if strings.Contains(value, "|") {
values := strings.Split(value, "|")
sides := 0
hasConst := false
for i, val := range values {
val := strings.Trim(val, " \t\r\n")
values[i] = val
if val[0] == '@' {
hasConst = true
} else if n, err := strconv.Atoi(val); err == nil {
if n < 1 || n > AllSides {
return false
}
sides |= n
} else if n, ok := validValues[val]; ok {
sides |= n
} else {
return false
}
}
if hasConst {
value = values[0]
for i := 1; i < len(values); i++ {
value += "|" + values[i]
}
resizable.properties[Side] = value
return true
}
if sides >= 1 && sides <= AllSides {
resizable.properties[Side] = sides
return true
}
} else if value[0] == '@' {
resizable.properties[Side] = value
return true
} else if n, ok := validValues[value]; ok {
resizable.properties[Side] = n
return true
}
case int:
if value >= 1 && value <= AllSides {
resizable.properties[Side] = value
return true
} else {
ErrorLogF(`Invalid value %d of "side" property`, value)
return false
}
default:
if n, ok := isInt(value); ok {
if n >= 1 && n <= AllSides {
resizable.properties[Side] = n
return true
} else {
ErrorLogF(`Invalid value %d of "side" property`, n)
return false
}
}
}
return false
}
func (resizable *resizableData) resizeBorderWidth() SizeUnit {
result, _ := sizeProperty(resizable, ResizeBorderWidth, resizable.Session())
if result.Type == Auto || result.Value == 0 {
return Px(4)
}
return result
}
func (resizable *resizableData) updateResizeBorderWidth() {
if resizable.created {
htmlID := resizable.htmlID()
session := resizable.Session()
column, row := resizable.cellSizeCSS()
updateCSSProperty(htmlID, "grid-template-columns", column, session)
updateCSSProperty(htmlID, "grid-template-rows", row, session)
}
}
func (resizable *resizableData) cellSizeCSS() (string, string) {
w := resizable.resizeBorderWidth().cssString("4px")
side := resizable.getSide()
column := "1fr"
row := "1fr"
if side&LeftSide != 0 {
if (side & RightSide) != 0 {
column = w + " 1fr " + w
} else {
column = w + " 1fr"
}
} else if (side & RightSide) != 0 {
column = "1fr " + w
}
if side&TopSide != 0 {
if (side & BottomSide) != 0 {
row = w + " 1fr " + w
} else {
row = w + " 1fr"
}
} else if (side & BottomSide) != 0 {
row = "1fr " + w
}
return column, row
}
func (resizable *resizableData) cssStyle(self View, builder cssBuilder) {
column, row := resizable.cellSizeCSS()
builder.add("grid-template-columns", column)
builder.add("grid-template-rows", row)
resizable.viewData.cssStyle(self, builder)
}
func (resizable *resizableData) htmlSubviews(self View, buffer *strings.Builder) {
side := resizable.getSide()
left := 1
top := 1
leftSide := (side & LeftSide) != 0
rightSide := (side & RightSide) != 0
w := resizable.resizeBorderWidth().cssString("4px")
if leftSide {
left = 2
}
writePos := func(x1, x2, y1, y2 int) {
buffer.WriteString(fmt.Sprintf(` grid-column-start: %d; grid-column-end: %d; grid-row-start: %d; grid-row-end: %d;"></div>`, x1, x2, y1, y2))
}
//htmlID := resizable.htmlID()
if (side & TopSide) != 0 {
top = 2
if leftSide {
buffer.WriteString(`<div onmousedown="startResize(this, -1, -1, event)" style="cursor: nwse-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(1, 2, 1, 2)
}
buffer.WriteString(`<div onmousedown="startResize(this, 0, -1, event)" style="cursor: ns-resize; width: 100%; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(left, left+1, 1, 2)
if rightSide {
buffer.WriteString(`<div onmousedown="startResize(this, 1, -1, event)" style="cursor: nesw-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(left+1, left+2, 1, 2)
}
}
if leftSide {
buffer.WriteString(`<div onmousedown="startResize(this, -1, 0, event)" style="cursor: ew-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: 100%;`)
writePos(1, 2, top, top+1)
}
if rightSide {
buffer.WriteString(`<div onmousedown="startResize(this, 1, 0, event)" style="cursor: ew-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: 100%;`)
writePos(left+1, left+2, top, top+1)
}
if (side & BottomSide) != 0 {
if leftSide {
buffer.WriteString(`<div onmousedown="startResize(this, -1, 1, event)" style="cursor: nesw-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(1, 2, top+1, top+2)
}
buffer.WriteString(`<div onmousedown="startResize(this, 0, 1, event)" style="cursor: ns-resize; width: 100%; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(left, left+1, top+1, top+2)
if rightSide {
buffer.WriteString(`<div onmousedown="startResize(this, 1, 1, event)" style="cursor: nwse-resize; width: `)
buffer.WriteString(w)
buffer.WriteString(`; height: `)
buffer.WriteString(w)
buffer.WriteString(`;`)
writePos(left+1, left+2, top+1, top+2)
}
}
if len(resizable.content) > 0 {
view := resizable.content[0]
view.addToCSSStyle(map[string]string{
"grid-column-start": strconv.Itoa(left),
"grid-column-end": strconv.Itoa(left + 1),
"grid-row-start": strconv.Itoa(top),
"grid-row-end": strconv.Itoa(top + 1),
})
viewHTML(view, buffer)
}
}