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package dev.isxander.yacl3.gui.tab;
import com.google.common.collect.ImmutableList;
import dev.isxander.yacl3.mixin.TabNavigationBarAccessor;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Font;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.client.gui.components.AbstractWidget;
import net.minecraft.client.gui.components.TabButton;
import net.minecraft.client.gui.components.events.GuiEventListener;
import net.minecraft.client.gui.components.tabs.Tab;
import net.minecraft.client.gui.components.tabs.TabManager;
import net.minecraft.client.gui.components.tabs.TabNavigationBar;
import net.minecraft.client.gui.layouts.Layout;
import net.minecraft.util.Mth;
import org.jetbrains.annotations.Nullable;
public class ScrollableNavigationBar extends TabNavigationBar {
private static final int NAVBAR_MARGIN = 28;
private static final Font font = Minecraft.getInstance().font;
private int scrollOffset;
private int maxScrollOffset;
public ScrollableNavigationBar(int width, TabManager tabManager, Iterable<? extends Tab> tabs) {
super(width, tabManager, ImmutableList.copyOf(tabs));
// add tab tooltips to the tab buttons
for (TabButton tabButton : this.tabButtons) {
if (tabButton.tab() instanceof TabExt tab) {
tabButton.setTooltip(tab.getTooltip());
}
}
}
@Override
public void arrangeElements() {
int noScrollWidth = this.width - NAVBAR_MARGIN*2;
int allTabsWidth = 0;
// first pass: set the width of each tab button
for (TabButton tabButton : this.tabButtons) {
int buttonWidth = font.width(tabButton.getMessage()) + 20;
allTabsWidth += buttonWidth;
tabButton.setWidth(buttonWidth);
}
if (allTabsWidth < noScrollWidth) {
int equalWidth = noScrollWidth / this.tabButtons.size();
var smallTabs = this.tabButtons.stream().filter(btn -> btn.getWidth() < equalWidth).toList();
var bigTabs = this.tabButtons.stream().filter(btn -> btn.getWidth() >= equalWidth).toList();
int leftoverWidth = noScrollWidth - bigTabs.stream().mapToInt(AbstractWidget::getWidth).sum();
int equalWidthForSmallTabs = leftoverWidth / smallTabs.size();
for (TabButton tabButton : smallTabs) {
tabButton.setWidth(equalWidthForSmallTabs);
}
allTabsWidth = noScrollWidth;
}
Layout layout = ((TabNavigationBarAccessor) this).getLayout();
layout.arrangeElements();
layout.setY(0);
scrollOffset = 0;
layout.setX(Math.max((this.width - allTabsWidth) / 2, NAVBAR_MARGIN));
this.maxScrollOffset = Math.max(0, allTabsWidth - noScrollWidth);
}
@Override
public void render(GuiGraphics graphics, int mouseX, int mouseY, float delta) {
graphics.pose().pushPose();
// render option list BELOW the navbar without need to scissor
graphics.pose().translate(0, 0, 10);
super.render(graphics, mouseX, mouseY, delta);
graphics.pose().popPose();
}
@Override
public boolean mouseScrolled(double mouseX, double mouseY, /*? if >1.20.2 {*/ double horizontal, /*?}*/ double vertical) {
this.setScrollOffset(this.scrollOffset - (int)(vertical*15));
return true;
}
@Override
public boolean isMouseOver(double mouseX, double mouseY) {
return mouseY <= 24;
}
public void setScrollOffset(int scrollOffset) {
Layout layout = ((TabNavigationBarAccessor) this).getLayout();
layout.setX(layout.getX() + this.scrollOffset);
this.scrollOffset = Mth.clamp(scrollOffset, 0, maxScrollOffset);
layout.setX(layout.getX() - this.scrollOffset);
}
public int getScrollOffset() {
return scrollOffset;
}
@Override
public void setFocused(@Nullable GuiEventListener child) {
super.setFocused(child);
if (child instanceof TabButton tabButton) {
this.ensureVisible(tabButton);
}
}
protected void ensureVisible(TabButton tabButton) {
if (tabButton.getX() < NAVBAR_MARGIN) {
this.setScrollOffset(this.scrollOffset - (NAVBAR_MARGIN - tabButton.getX()));
} else if (tabButton.getX() + tabButton.getWidth() > this.width - NAVBAR_MARGIN) {
this.setScrollOffset(this.scrollOffset + (tabButton.getX() + tabButton.getWidth() - (this.width - NAVBAR_MARGIN)));
}
}
}
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