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[Markdown][IJPL-163504] Implement ZoomableViewport for Markdown preview

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(cherry picked from commit d689eefa276337a8ac0e2202239b8ee0cc248a52)

IJ-CR-147177

GitOrigin-RevId: d65a5aebadcab79168e26ec3068f67a7d2176242
This commit is contained in:
Ekaterina Berezhko
2024-10-09 16:50:49 +03:00
committed by intellij-monorepo-bot
parent a06614cbba
commit 955a0d04ea
1 changed files with 36 additions and 17 deletions
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53
plugins/markdown/core/src/org/intellij/plugins/markdown/ui/preview/jcef/MarkdownJCEFHtmlPanel.kt
View File

@@ -16,8 +16,8 @@ import com.intellij.openapi.util.registry.Registry
import com.intellij.openapi.vfs.VirtualFile
import com.intellij.ui.awt.RelativePoint
import com.intellij.ui.components.JBLoadingPanel
import com.intellij.ui.components.JBViewport
import com.intellij.ui.components.Magnificator
import com.intellij.ui.components.ZoomableViewport
import com.intellij.ui.jcef.JBCefApp
import com.intellij.ui.jcef.JBCefClient
import com.intellij.ui.jcef.JCEFHtmlPanel
@@ -49,6 +49,7 @@ import java.awt.BorderLayout
import java.awt.Point
import java.net.URL
import javax.swing.JComponent
import javax.swing.JPanel
import kotlin.math.round
class MarkdownJCEFHtmlPanel(
@@ -280,37 +281,55 @@ class MarkdownJCEFHtmlPanel(
executeJavaScript("window.scrollController?.scrollBy($horizontal, $vertical)")
}
private var previewInnerComponent: JComponent? = null
private val previewInnerComponent by lazy { super.getComponent() }
private val TEMPORARY_FONT_SIZE = Key.create<Int>("Markdown.Preview.FontSize")
private fun createComponent(): JComponent {
previewInnerComponent = super.getComponent()
if (project == null || virtualFile == null) return previewInnerComponent!!
private inner class ViewPort : JPanel(BorderLayout()), ZoomableViewport {
private var myMagnificationPoint: Point? = null
val panel = JBLoadingPanel(BorderLayout(), this)
previewInnerComponent!!.putClientProperty(Magnificator.CLIENT_PROPERTY_KEY, object: Magnificator {
override fun magnify(scale: Double, at: Point): Point {
override fun getMagnificator(): Magnificator {
return Magnificator { scale, at ->
val currentSize = this@MarkdownJCEFHtmlPanel.getTemporaryFontSize() ?: PreviewLAFThemeStyles.defaultFontSize
var fontSize = round(currentSize * scale).toInt()
fontSize = maxOf(fontSize, fontSizeOptions.first())
fontSize = minOf(fontSize, fontSizeOptions.last())
changeFontSize(fontSize, temporary = true)
return at
at
}
})
}
previewInnerComponent!!.addPropertyChangeListener(TEMPORARY_FONT_SIZE.toString()) {
override fun magnificationStarted(at: Point) {
myMagnificationPoint = at
}
override fun magnificationFinished(magnification: Double) {
myMagnificationPoint = null
}
override fun magnify(magnification: Double) {
if (magnification.compareTo(0.0) != 0 && myMagnificationPoint != null) {
val magnificator = magnificator
val step = magnification * 0.1
val scale = if (magnification < 0) 1 / (1 - step) else 1 + step
magnificator.magnify(scale, myMagnificationPoint)
}
}
}
private fun createComponent(): JComponent {
if (project == null || virtualFile == null) return previewInnerComponent
val panel = JBLoadingPanel(BorderLayout(), this)
previewInnerComponent.addPropertyChangeListener(TEMPORARY_FONT_SIZE.toString()) {
val balloon = project.service<PreviewZoomIndicatorManager>().createOrGetBalloon(this@MarkdownJCEFHtmlPanel)
balloon?.show(RelativePoint.getSouthOf(previewInnerComponent!!), Balloon.Position.below)
balloon?.show(RelativePoint.getSouthOf(previewInnerComponent), Balloon.Position.below)
}
coroutineScope.async(context = Dispatchers.Default, start = CoroutineStart.UNDISPATCHED) {
panel.startLoading()
val viewPort = JBViewport().apply {
layout = BorderLayout()
}
val viewPort = ViewPort()
viewPort.add(previewInnerComponent, BorderLayout.CENTER)
panel.add(viewPort)
projectRoot.await()
@@ -328,7 +347,7 @@ class MarkdownJCEFHtmlPanel(
if (temporary) {
val previousSize = getUserData(TEMPORARY_FONT_SIZE) ?: PreviewLAFThemeStyles.defaultFontSize
putUserData(TEMPORARY_FONT_SIZE, size)
previewInnerComponent?.firePropertyChange(TEMPORARY_FONT_SIZE.toString(), previousSize, size)
previewInnerComponent.firePropertyChange(TEMPORARY_FONT_SIZE.toString(), previousSize, size)
} else {
putUserData(TEMPORARY_FONT_SIZE, null)
}