From b1628023f733924d33c499fc1de42eeb21868ef0 Mon Sep 17 00:00:00 2001
From: Alexei Anoshenko <anoshenko@gmail.com>
Date: Thu, 2 May 2024 15:07:57 +0300
Subject: [PATCH] Excluding default properties of CustomView from the result of
 String()

---
 audioPlayer.go    |  2 +-
 canvasView.go     |  2 +-
 checkbox.go       |  2 +-
 colorPicker.go    |  2 +-
 columnLayout.go   |  2 +-
 customView.go     | 26 +++++++++++++++++++++++---
 datePicker.go     |  2 +-
 dropDownList.go   |  2 +-
 editView.go       |  2 +-
 filePicker.go     |  2 +-
 gridLayout.go     |  2 +-
 imageView.go      |  2 +-
 listLayout.go     |  2 +-
 listView.go       |  2 +-
 mediaPlayer.go    |  2 +-
 numberPicker.go   |  2 +-
 progressBar.go    |  2 +-
 resizable.go      |  2 +-
 stackLayout.go    |  2 +-
 svgImageView.go   |  2 +-
 tableView.go      |  2 +-
 tabsLayout.go     |  2 +-
 textView.go       |  2 +-
 theme.go          |  4 ++--
 timePicker.go     |  2 +-
 videoPlayer.go    |  2 +-
 view.go           |  7 ++++++-
 viewStyle.go      | 16 +++++++++++-----
 viewsContainer.go |  2 +-
 29 files changed, 67 insertions(+), 36 deletions(-)

diff --git a/audioPlayer.go b/audioPlayer.go
index a7cecc3..035c501 100644
--- a/audioPlayer.go
+++ b/audioPlayer.go
@@ -27,7 +27,7 @@ func (player *audioPlayerData) init(session Session) {
 }
 
 func (player *audioPlayerData) String() string {
-	return getViewString(player)
+	return getViewString(player, nil)
 }
 
 func (player *audioPlayerData) htmlTag() string {
diff --git a/canvasView.go b/canvasView.go
index 6dbde8f..473bda4 100644
--- a/canvasView.go
+++ b/canvasView.go
@@ -37,7 +37,7 @@ func (canvasView *canvasViewData) init(session Session) {
 }
 
 func (canvasView *canvasViewData) String() string {
-	return getViewString(canvasView)
+	return getViewString(canvasView, nil)
 }
 
 func (canvasView *canvasViewData) normalizeTag(tag string) string {
diff --git a/checkbox.go b/checkbox.go
index 8a3605f..39691ec 100644
--- a/checkbox.go
+++ b/checkbox.go
@@ -43,7 +43,7 @@ func (button *checkboxData) init(session Session) {
 }
 
 func (button *checkboxData) String() string {
-	return getViewString(button)
+	return getViewString(button, nil)
 }
 
 func (button *checkboxData) Focusable() bool {
diff --git a/colorPicker.go b/colorPicker.go
index bde5c6e..3b63b6a 100644
--- a/colorPicker.go
+++ b/colorPicker.go
@@ -40,7 +40,7 @@ func (picker *colorPickerData) init(session Session) {
 }
 
 func (picker *colorPickerData) String() string {
-	return getViewString(picker)
+	return getViewString(picker, nil)
 }
 
 func (picker *colorPickerData) normalizeTag(tag string) string {
diff --git a/columnLayout.go b/columnLayout.go
index 1a883f7..b0d468c 100644
--- a/columnLayout.go
+++ b/columnLayout.go
@@ -81,7 +81,7 @@ func (ColumnLayout *columnLayoutData) init(session Session) {
 }
 
 func (columnLayout *columnLayoutData) String() string {
-	return getViewString(columnLayout)
+	return getViewString(columnLayout, nil)
 }
 
 func (columnLayout *columnLayoutData) normalizeTag(tag string) string {
diff --git a/customView.go b/customView.go
index a846916..d74e9ed 100644
--- a/customView.go
+++ b/customView.go
@@ -13,8 +13,9 @@ type CustomView interface {
 
 // CustomViewData defines a data of a basic custom view
 type CustomViewData struct {
-	tag       string
-	superView View
+	tag           string
+	superView     View
+	defaultParams Params
 }
 
 // InitCustomView initializes fields of CustomView by default values
@@ -37,6 +38,12 @@ func (customView *CustomViewData) SuperView() View {
 
 func (customView *CustomViewData) setSuperView(view View) {
 	customView.superView = view
+	customView.defaultParams = Params{}
+	for _, tag := range view.AllTags() {
+		if value := view.getRaw(tag); value != nil {
+			customView.defaultParams[tag] = value
+		}
+	}
 }
 
 func (customView *CustomViewData) setTag(tag string) {
@@ -252,9 +259,22 @@ func (customView *CustomViewData) ViewIndex(view View) int {
 	return -1
 }
 
+func (customView *CustomViewData) exscludeTags() []string {
+	if customView.superView != nil {
+		exsclude := []string{}
+		for tag, value := range customView.defaultParams {
+			if value == customView.superView.getRaw(tag) {
+				exsclude = append(exsclude, tag)
+			}
+		}
+		return exsclude
+	}
+	return nil
+}
+
 func (customView *CustomViewData) String() string {
 	if customView.superView != nil {
-		return getViewString(customView)
+		return getViewString(customView, customView.exscludeTags())
 	}
 	return customView.tag + " { }"
 }
diff --git a/datePicker.go b/datePicker.go
index 404144c..983ffd6 100644
--- a/datePicker.go
+++ b/datePicker.go
@@ -45,7 +45,7 @@ func (picker *datePickerData) init(session Session) {
 }
 
 func (picker *datePickerData) String() string {
-	return getViewString(picker)
+	return getViewString(picker, nil)
 }
 
 func (picker *datePickerData) Focusable() bool {
diff --git a/dropDownList.go b/dropDownList.go
index a62a80a..a2d6159 100644
--- a/dropDownList.go
+++ b/dropDownList.go
@@ -46,7 +46,7 @@ func (list *dropDownListData) init(session Session) {
 }
 
 func (list *dropDownListData) String() string {
-	return getViewString(list)
+	return getViewString(list, nil)
 }
 
 func (list *dropDownListData) Focusable() bool {
diff --git a/editView.go b/editView.go
index 36b283f..627ac71 100644
--- a/editView.go
+++ b/editView.go
@@ -64,7 +64,7 @@ func (edit *editViewData) init(session Session) {
 }
 
 func (edit *editViewData) String() string {
-	return getViewString(edit)
+	return getViewString(edit, nil)
 }
 
 func (edit *editViewData) Focusable() bool {
diff --git a/filePicker.go b/filePicker.go
index cf2b357..b3e759d 100644
--- a/filePicker.go
+++ b/filePicker.go
@@ -90,7 +90,7 @@ func (picker *filePickerData) init(session Session) {
 }
 
 func (picker *filePickerData) String() string {
-	return getViewString(picker)
+	return getViewString(picker, nil)
 }
 
 func (picker *filePickerData) Focusable() bool {
diff --git a/gridLayout.go b/gridLayout.go
index 20dbb10..e0e83e4 100644
--- a/gridLayout.go
+++ b/gridLayout.go
@@ -72,7 +72,7 @@ func (gridLayout *gridLayoutData) init(session Session) {
 }
 
 func (gridLayout *gridLayoutData) String() string {
-	return getViewString(gridLayout)
+	return getViewString(gridLayout, nil)
 }
 
 func (style *viewStyle) setGridCellSize(tag string, value any) bool {
diff --git a/imageView.go b/imageView.go
index 8c52098..d87f3e9 100644
--- a/imageView.go
+++ b/imageView.go
@@ -71,7 +71,7 @@ func (imageView *imageViewData) init(session Session) {
 }
 
 func (imageView *imageViewData) String() string {
-	return getViewString(imageView)
+	return getViewString(imageView, nil)
 }
 
 func (imageView *imageViewData) normalizeTag(tag string) string {
diff --git a/listLayout.go b/listLayout.go
index 6bdcac2..c244e75 100644
--- a/listLayout.go
+++ b/listLayout.go
@@ -56,7 +56,7 @@ func (listLayout *listLayoutData) init(session Session) {
 }
 
 func (listLayout *listLayoutData) String() string {
-	return getViewString(listLayout)
+	return getViewString(listLayout, nil)
 }
 
 func (listLayout *listLayoutData) normalizeTag(tag string) string {
diff --git a/listView.go b/listView.go
index ab70396..b32407e 100644
--- a/listView.go
+++ b/listView.go
@@ -97,7 +97,7 @@ func (listView *listViewData) init(session Session) {
 }
 
 func (listView *listViewData) String() string {
-	return getViewString(listView)
+	return getViewString(listView, nil)
 }
 
 func (listView *listViewData) Views() []View {
diff --git a/mediaPlayer.go b/mediaPlayer.go
index 2eee66b..445be0a 100644
--- a/mediaPlayer.go
+++ b/mediaPlayer.go
@@ -211,7 +211,7 @@ func (player *mediaPlayerData) init(session Session) {
 }
 
 func (player *mediaPlayerData) String() string {
-	return getViewString(player)
+	return getViewString(player, nil)
 }
 
 func (player *mediaPlayerData) Focusable() bool {
diff --git a/numberPicker.go b/numberPicker.go
index 0db087a..e41f9e1 100644
--- a/numberPicker.go
+++ b/numberPicker.go
@@ -72,7 +72,7 @@ func (picker *numberPickerData) init(session Session) {
 }
 
 func (picker *numberPickerData) String() string {
-	return getViewString(picker)
+	return getViewString(picker, nil)
 }
 
 func (picker *numberPickerData) Focusable() bool {
diff --git a/progressBar.go b/progressBar.go
index f42b5e6..a5dac46 100644
--- a/progressBar.go
+++ b/progressBar.go
@@ -37,7 +37,7 @@ func (progress *progressBarData) init(session Session) {
 }
 
 func (progress *progressBarData) String() string {
-	return getViewString(progress)
+	return getViewString(progress, nil)
 }
 
 func (progress *progressBarData) normalizeTag(tag string) string {
diff --git a/resizable.go b/resizable.go
index a183ea5..c504f26 100644
--- a/resizable.go
+++ b/resizable.go
@@ -63,7 +63,7 @@ func (resizable *resizableData) init(session Session) {
 }
 
 func (resizable *resizableData) String() string {
-	return getViewString(resizable)
+	return getViewString(resizable, nil)
 }
 
 func (resizable *resizableData) Views() []View {
diff --git a/stackLayout.go b/stackLayout.go
index 1c0a78f..960bcb9 100644
--- a/stackLayout.go
+++ b/stackLayout.go
@@ -82,7 +82,7 @@ func (layout *stackLayoutData) init(session Session) {
 }
 
 func (layout *stackLayoutData) String() string {
-	return getViewString(layout)
+	return getViewString(layout, nil)
 }
 
 func (layout *stackLayoutData) pushFinished(view View, tag string) {
diff --git a/svgImageView.go b/svgImageView.go
index f2a6c7f..b1a7e06 100644
--- a/svgImageView.go
+++ b/svgImageView.go
@@ -36,7 +36,7 @@ func (imageView *svgImageViewData) init(session Session) {
 }
 
 func (imageView *svgImageViewData) String() string {
-	return getViewString(imageView)
+	return getViewString(imageView, nil)
 }
 
 func (imageView *svgImageViewData) normalizeTag(tag string) string {
diff --git a/tableView.go b/tableView.go
index 01fcdc1..33c5110 100644
--- a/tableView.go
+++ b/tableView.go
@@ -270,7 +270,7 @@ func (table *tableViewData) init(session Session) {
 }
 
 func (table *tableViewData) String() string {
-	return getViewString(table)
+	return getViewString(table, nil)
 }
 
 func (table *tableViewData) normalizeTag(tag string) string {
diff --git a/tabsLayout.go b/tabsLayout.go
index 881f485..0f28558 100644
--- a/tabsLayout.go
+++ b/tabsLayout.go
@@ -99,7 +99,7 @@ func (tabsLayout *tabsLayoutData) init(session Session) {
 }
 
 func (tabsLayout *tabsLayoutData) String() string {
-	return getViewString(tabsLayout)
+	return getViewString(tabsLayout, nil)
 }
 
 func (tabsLayout *tabsLayoutData) currentItem(defaultValue int) int {
diff --git a/textView.go b/textView.go
index 90f2026..21d9995 100644
--- a/textView.go
+++ b/textView.go
@@ -33,7 +33,7 @@ func (textView *textViewData) init(session Session) {
 }
 
 func (textView *textViewData) String() string {
-	return getViewString(textView)
+	return getViewString(textView, nil)
 }
 
 func (textView *textViewData) Get(tag string) any {
diff --git a/theme.go b/theme.go
index 2de69f7..fee0f16 100644
--- a/theme.go
+++ b/theme.go
@@ -933,7 +933,7 @@ func (theme *theme) String() string {
 		for _, tag := range tags {
 			if style, ok := styles[tag]; ok && len(style.AllTags()) > 0 {
 				buffer.WriteString("\t\t")
-				writeViewStyle(tag, style, buffer, "\t\t")
+				writeViewStyle(tag, style, buffer, "\t\t", nil)
 				buffer.WriteString(",\n")
 			}
 		}
@@ -984,7 +984,7 @@ func (theme *theme) String() string {
 			for _, tag := range tags {
 				if style, ok := media.styles[tag]; ok && len(style.AllTags()) > 0 {
 					buffer.WriteString("\t\t")
-					writeViewStyle(tag, style, buffer, "\t\t")
+					writeViewStyle(tag, style, buffer, "\t\t", nil)
 					buffer.WriteString(",\n")
 				}
 			}
diff --git a/timePicker.go b/timePicker.go
index feab2ad..9be94b8 100644
--- a/timePicker.go
+++ b/timePicker.go
@@ -45,7 +45,7 @@ func (picker *timePickerData) init(session Session) {
 }
 
 func (picker *timePickerData) String() string {
-	return getViewString(picker)
+	return getViewString(picker, nil)
 }
 
 func (picker *timePickerData) Focusable() bool {
diff --git a/videoPlayer.go b/videoPlayer.go
index ca8d2fd..0369fa2 100644
--- a/videoPlayer.go
+++ b/videoPlayer.go
@@ -47,7 +47,7 @@ func (player *videoPlayerData) init(session Session) {
 }
 
 func (player *videoPlayerData) String() string {
-	return getViewString(player)
+	return getViewString(player, nil)
 }
 
 func (player *videoPlayerData) htmlTag() string {
diff --git a/view.go b/view.go
index 4d0d8ff..66ea1f1 100644
--- a/view.go
+++ b/view.go
@@ -76,6 +76,7 @@ type View interface {
 	htmlProperties(self View, buffer *strings.Builder)
 	cssStyle(self View, builder cssBuilder)
 	addToCSSStyle(addCSS map[string]string)
+	exscludeTags() []string
 
 	onResize(self View, x, y, width, height float64)
 	onItemResize(self View, index string, x, y, width, height float64)
@@ -999,5 +1000,9 @@ func (view *viewData) HasFocus() bool {
 }
 
 func (view *viewData) String() string {
-	return getViewString(view)
+	return getViewString(view, nil)
+}
+
+func (view *viewData) exscludeTags() []string {
+	return nil
 }
diff --git a/viewStyle.go b/viewStyle.go
index 4c6d6e6..2a5682e 100644
--- a/viewStyle.go
+++ b/viewStyle.go
@@ -710,14 +710,14 @@ func writePropertyValue(buffer *strings.Builder, tag string, value any, indent s
 			buffer.WriteString("[]")
 
 		case 1:
-			writeViewStyle(value[0].Tag(), value[0], buffer, indent)
+			writeViewStyle(value[0].Tag(), value[0], buffer, indent, value[0].exscludeTags())
 
 		default:
 			buffer.WriteString("[\n")
 			indent2 := indent + "\t"
 			for _, v := range value {
 				buffer.WriteString(indent2)
-				writeViewStyle(v.Tag(), v, buffer, indent2)
+				writeViewStyle(v.Tag(), v, buffer, indent2, v.exscludeTags())
 				buffer.WriteString(",\n")
 			}
 
@@ -819,12 +819,18 @@ func writePropertyValue(buffer *strings.Builder, tag string, value any, indent s
 	}
 }
 
-func writeViewStyle(name string, view ViewStyle, buffer *strings.Builder, indent string) {
+func writeViewStyle(name string, view ViewStyle, buffer *strings.Builder, indent string, excludeTags []string) {
 	buffer.WriteString(name)
 	buffer.WriteString(" {\n")
 	indent += "\t"
 
 	writeProperty := func(tag string, value any) {
+		for _, exclude := range excludeTags {
+			if exclude == tag {
+				return
+			}
+		}
+
 		if supportedPropertyValue(value) {
 			buffer.WriteString(indent)
 			buffer.WriteString(tag)
@@ -896,10 +902,10 @@ func writeViewStyle(name string, view ViewStyle, buffer *strings.Builder, indent
 	buffer.WriteString("}")
 }
 
-func getViewString(view View) string {
+func getViewString(view View, excludeTags []string) string {
 	buffer := allocStringBuilder()
 	defer freeStringBuilder(buffer)
-	writeViewStyle(view.Tag(), view, buffer, "")
+	writeViewStyle(view.Tag(), view, buffer, "", excludeTags)
 	return buffer.String()
 
 }
diff --git a/viewsContainer.go b/viewsContainer.go
index e1520f5..facd0e3 100644
--- a/viewsContainer.go
+++ b/viewsContainer.go
@@ -38,7 +38,7 @@ func (container *viewsContainerData) init(session Session) {
 }
 
 func (container *viewsContainerData) String() string {
-	return getViewString(container)
+	return getViewString(container, nil)
 }
 
 func (container *viewsContainerData) setParentID(parentID string) {