feat(styles): one stylesheet source for react and svelte (#3350)

* feat(styles): create stylesheets for react and svelte based on one source

* refactor(styling): cleanup

* refactor(postcss): share a config

* refactor(postcss): replace env hack with env file

packages/system/src/styles/base.css

@@ -0,0 +1,33 @@
+.xy-flow {
+  --node-border-default: 1px solid #bbb;
+  --node-border-selected-default: 1px solid #555;
+
+  --handle-background-color-default: #333;
+
+  --selection-background-color-default: rgba(150, 150, 180, 0.1);
+  --selection-border-default: 1px dotted rgba(155, 155, 155, 0.8);
+}
+
+.xy-flow__handle {
+  background-color: var(--handle-background-color, var(--handle-background-color-default));
+}
+
+.xy-flow__node-input,
+.xy-flow__node-default,
+.xy-flow__node-output,
+.xy-flow__node-group {
+  border: var(--node-border, var(--node-border-default));
+
+  &.selected,
+  &:focus,
+  &:focus-visible {
+    outline: none;
+    border: var(--node-border-selected, var(--node-border-selected-default));
+  }
+}
+
+.xy-flow__nodesselection-rect,
+.xy-flow__selection {
+  background: var(--selection-background-color, var(--selection-background-color-default));
+  border: var(--selection-border, var(--selection-border-default));
+}

packages/system/src/styles/init.css

@@ -0,0 +1,298 @@
+/* these are the necessary styles for React/Svelte Flow, they get used by base.css and style.css */
+
+.xy-flow {
+  --edge-stroke-default: #b1b1b7;
+  --edge-stroke-width-default: 1;
+  --edge-stroke-selected-default: #555;
+
+  --connectionline-stroke-default: #b1b1b7;
+  --connectionline-stroke-width-default: 1;
+
+  --attribution-background-color-default: rgba(255, 255, 255, 0.5);
+
+  --minimap-background-color-default: #fff;
+
+  --background-pattern-dot-color-default: #91919a;
+  --background-pattern-line-color-default: #eee;
+  --background-pattern-cross-color-default: #e2e2e2;
+}
+
+.xy-flow__container {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  top: 0;
+  left: 0;
+}
+
+.xy-flow__pane {
+  z-index: 1;
+  cursor: grab;
+
+  &.selection {
+    cursor: pointer;
+  }
+
+  &.dragging {
+    cursor: grabbing;
+  }
+}
+
+.xy-flow__viewport {
+  transform-origin: 0 0;
+  z-index: 2;
+  pointer-events: none;
+}
+
+.xy-flow__renderer {
+  z-index: 4;
+}
+
+.xy-flow__selection {
+  z-index: 6;
+}
+
+.xy-flow__nodesselection-rect:focus,
+.xy-flow__nodesselection-rect:focus-visible {
+  outline: none;
+}
+
+.xy-flow .xy-flow__edges {
+  pointer-events: none;
+  overflow: visible;
+}
+
+.xy-flow__edge-path {
+  stroke: var(--edge-stroke, var(--edge-stroke-default));
+  stroke-width: var(--edge-stroke-width, var(--edge-stroke-width-default));
+  fill: none;
+}
+
+.xy-flow__connection-path {
+  stroke: var(--connectionline-stroke, var(--connectionline-stroke-default));
+  stroke-width: var(--connectionline-stroke-width, var(--connectionline-stroke-width-default));
+  fill: none;
+}
+
+.xy-flow__edge {
+  pointer-events: visibleStroke;
+  cursor: pointer;
+
+  &.animated path {
+    stroke-dasharray: 5;
+    animation: dashdraw 0.5s linear infinite;
+  }
+
+  &.animated path.xy-flow__edge-interaction {
+    stroke-dasharray: none;
+    animation: none;
+  }
+
+  &.inactive {
+    pointer-events: none;
+  }
+
+  &.selected,
+  &:focus,
+  &:focus-visible {
+    outline: none;
+  }
+
+  &.selected .xy-flow__edge-path,
+  &:focus .xy-flow__edge-path,
+  &:focus-visible .xy-flow__edge-path {
+    stroke: var(--edge-stroke-selected, var(--edge-stroke-selected-default));
+  }
+
+  &-textwrapper {
+    pointer-events: all;
+  }
+
+  &-textbg {
+    fill: white;
+  }
+
+  .xy-flow__edge-text {
+    pointer-events: none;
+    user-select: none;
+  }
+}
+
+.xy-flow__connection {
+  pointer-events: none;
+
+  .animated {
+    stroke-dasharray: 5;
+    animation: dashdraw 0.5s linear infinite;
+  }
+}
+
+.xy-flow__connectionline {
+  z-index: 1001;
+}
+
+.xy-flow__nodes {
+  pointer-events: none;
+  transform-origin: 0 0;
+}
+
+.xy-flow__node {
+  position: absolute;
+  user-select: none;
+  pointer-events: all;
+  transform-origin: 0 0;
+  box-sizing: border-box;
+  cursor: grab;
+
+  &.dragging {
+    cursor: grabbing;
+  }
+
+  /* only used in Svelte Flow, should we remove it here? */
+  &.draggable {
+    cursor: grab;
+    pointer-events: all;
+  }
+}
+
+.xy-flow__nodesselection {
+  z-index: 3;
+  transform-origin: left top;
+  pointer-events: none;
+
+  &-rect {
+    position: absolute;
+    pointer-events: all;
+    cursor: grab;
+  }
+}
+
+.xy-flow__handle {
+  position: absolute;
+  pointer-events: none;
+  min-width: 5px;
+  min-height: 5px;
+
+  &.connectionindicator {
+    pointer-events: all;
+    cursor: crosshair;
+  }
+
+  &-bottom {
+    top: auto;
+    left: 50%;
+    bottom: -4px;
+    transform: translate(-50%, 0);
+  }
+
+  &-top {
+    left: 50%;
+    top: -4px;
+    transform: translate(-50%, 0);
+  }
+
+  &-left {
+    top: 50%;
+    left: -4px;
+    transform: translate(0, -50%);
+  }
+
+  &-right {
+    right: -4px;
+    top: 50%;
+    transform: translate(0, -50%);
+  }
+}
+
+.xy-flow__edgeupdater {
+  cursor: move;
+  pointer-events: all;
+}
+
+.xy-flow__panel {
+  position: absolute;
+  z-index: 5;
+  margin: 15px;
+
+  &.top {
+    top: 0;
+  }
+
+  &.bottom {
+    bottom: 0;
+  }
+
+  &.left {
+    left: 0;
+  }
+
+  &.right {
+    right: 0;
+  }
+
+  &.center {
+    left: 50%;
+    transform: translateX(-50%);
+  }
+}
+
+.xy-flow__attribution {
+  font-size: 10px;
+  background: var(--attribution-background-color, var(--attribution-background-color-default));
+  padding: 2px 3px;
+  margin: 0;
+
+  a {
+    text-decoration: none;
+    color: #999;
+  }
+}
+
+@keyframes dashdraw {
+  from {
+    stroke-dashoffset: 10;
+  }
+}
+
+.xy-flow__edgelabel-renderer {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  pointer-events: none;
+  user-select: none;
+  left: 0;
+  top: 0;
+}
+
+.xy-flow__minimap {
+  stroke: var(--minimap-background-color, var(--minimap-background-color-default));
+}
+
+.xy-flow__background {
+  pointer-events: none;
+  z-index: -1;
+  background-color: var(--background-color-props, 'transparent');
+}
+
+.xy-flow__background-pattern {
+  &.dot {
+    fill: var(
+      --background-pattern-color-props,
+      var(--background-pattern-color, var(--background-pattern-dot-color-default))
+    );
+  }
+
+  &.line {
+    stroke: var(
+      --background-pattern-color-props,
+      var(--background-pattern-color, var(--background-pattern-line-color-default))
+    );
+  }
+
+  &.cross {
+    stroke: var(
+      --background-pattern-color-props,
+      var(--background-pattern-color, var(--background-pattern-cross-color-default))
+    );
+  }
+}

packages/system/src/styles/node-resizer.css

@@ -0,0 +1,105 @@
+.xy-flow__resize-control {
+  position: absolute;
+}
+
+.xy-flow__resize-control.left,
+.xy-flow__resize-control.right {
+  cursor: ew-resize;
+}
+
+.xy-flow__resize-control.top,
+.xy-flow__resize-control.bottom {
+  cursor: ns-resize;
+}
+
+.xy-flow__resize-control.top.left,
+.xy-flow__resize-control.bottom.right {
+  cursor: nwse-resize;
+}
+
+.xy-flow__resize-control.bottom.left,
+.xy-flow__resize-control.top.right {
+  cursor: nesw-resize;
+}
+
+/* handle styles */
+.xy-flow__resize-control.handle {
+  width: 4px;
+  height: 4px;
+  border: 1px solid #fff;
+  border-radius: 1px;
+  background-color: #3367d9;
+  transform: translate(-50%, -50%);
+}
+
+.xy-flow__resize-control.handle.left {
+  left: 0;
+  top: 50%;
+}
+.xy-flow__resize-control.handle.right {
+  left: 100%;
+  top: 50%;
+}
+.xy-flow__resize-control.handle.top {
+  left: 50%;
+  top: 0;
+}
+.xy-flow__resize-control.handle.bottom {
+  left: 50%;
+  top: 100%;
+}
+.xy-flow__resize-control.handle.top.left {
+  left: 0;
+}
+.xy-flow__resize-control.handle.bottom.left {
+  left: 0;
+}
+.xy-flow__resize-control.handle.top.right {
+  left: 100%;
+}
+.xy-flow__resize-control.handle.bottom.right {
+  left: 100%;
+}
+
+/* line styles */
+.xy-flow__resize-control.line {
+  border-color: #3367d9;
+  border-width: 0;
+  border-style: solid;
+}
+
+.xy-flow__resize-control.line.left,
+.xy-flow__resize-control.line.right {
+  width: 1px;
+  transform: translate(-50%, 0);
+  top: 0;
+  height: 100%;
+}
+
+.xy-flow__resize-control.line.left {
+  left: 0;
+  border-left-width: 1px;
+}
+
+.xy-flow__resize-control.line.right {
+  left: 100%;
+  border-right-width: 1px;
+}
+
+.xy-flow__resize-control.line.top,
+.xy-flow__resize-control.line.bottom {
+  height: 1px;
+  transform: translate(0, -50%);
+  left: 0;
+  width: 100%;
+}
+
+.xy-flow__resize-control.line.top {
+  top: 0;
+  border-top-width: 1px;
+}
+
+.xy-flow__resize-control.line.bottom {
+  border-bottom-width: 1px;
+  top: 100%;
+}

packages/system/src/styles/style.css

@@ -0,0 +1,138 @@
+.xy-flow {
+  --node-color-default: inherit;
+  --node-border-default: 1px solid #1a192b;
+  --node-background-color-default: #fff;
+  --node-group-background-color-default: rgba(240, 240, 240, 0.25);
+  --node-boxshadow-hover-default: 0 1px 4px 1px rgba(0, 0, 0, 0.08);
+  --node-boxshadow-selected-default: 0 0 0 0.5px #1a192b;
+
+  --handle-background-color-default: #1a192b;
+  --handle-border-color-default: #fff;
+
+  --selection-background-color-default: rgba(0, 89, 220, 0.08);
+  --selection-border-default: 1px dotted rgba(0, 89, 220, 0.8);
+
+  --controls-button-background-color-default: #fefefe;
+  --controls-button-background-color-hover-default: #f4f4f4;
+  --controls-button-color-default: inherit;
+  --controls-button-color-hover-default: inherit;
+  --controls-button-border-color-default: #eee;
+  --controls-box-shadow-default: 0 0 2px 1px rgba(0, 0, 0, 0.08);
+}
+
+.xy-flow__edge {
+  &.updating {
+    .xy-flow__edge-path {
+      stroke: #777;
+    }
+  }
+
+  &-text {
+    font-size: 10px;
+  }
+}
+
+.xy-flow__node.selectable {
+  &:focus,
+  &:focus-visible {
+    outline: none;
+  }
+}
+
+.xy-flow__node-input,
+.xy-flow__node-default,
+.xy-flow__node-output,
+.xy-flow__node-group {
+  padding: 10px;
+  border-radius: 3px;
+  width: 150px;
+  font-size: 12px;
+  color: var(--node-color, var(--node-color-default));
+  text-align: center;
+  border: var(--node-border, var(--node-border-default));
+  background-color: var(--node-background-color, var(--node-background-color-default));
+
+  &.selectable {
+    &:hover {
+      box-shadow: var(--node-boxshadow-hover, var(--node-boxshadow-hover-default));
+    }
+
+    &.selected,
+    &:focus,
+    &:focus-visible {
+      box-shadow: var(--node-boxshadow-selected, var(--node-boxshadow-selected-default));
+    }
+  }
+}
+
+.xy-flow__node-group {
+  background-color: var(--node-group-background-color, var(--node-group-background-color-default));
+}
+
+.xy-flow__nodesselection-rect,
+.xy-flow__selection {
+  background: var(--selection-background-color, var(--selection-background-color-default));
+  border: var(--selection-border, var(--selection-border-default));
+
+  &:focus,
+  &:focus-visible {
+    outline: none;
+  }
+}
+
+.xy-flow__handle {
+  width: 6px;
+  height: 6px;
+  background-color: var(--handle-background-color, var(--handle-background-color-default));
+  border: 1px solid var(--handle-border-color, var(--handle-border-color-default));
+  border-radius: 100%;
+}
+
+.xy-flow__controls {
+  box-shadow: var(--controls-box-shadow, var(--controls-box-shadow-default));
+
+  &-button {
+    border: none;
+    background: var(--controls-button-background-color, var(--controls-button-background-color-default));
+    border-bottom: 1px solid
+      var(
+        --controls-button-border-color-props,
+        var(--controls-button-border-color, var(--controls-button-border-color-default))
+      );
+    color: var(--controls-button-color-props, var(--controls-button-color, var(--controls-button-color-default)));
+    box-sizing: content-box;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    width: 16px;
+    height: 16px;
+    cursor: pointer;
+    user-select: none;
+    padding: 5px;
+
+    &:hover {
+      background: var(
+        --controls-button-background-color-hover-props,
+        var(--controls-button-background-color-hover, var(--controls-button-background-color-hover-default))
+      );
+      color: var(
+        --controls-button-color-hover-props,
+        var(--controls-button-hover-color, var(--controls-button-hover-color-default))
+      );
+    }
+
+    svg {
+      width: 100%;
+      max-width: 12px;
+      max-height: 12px;
+    }
+
+    &:disabled {
+      pointer-events: none;
+
+      svg {
+        fill-opacity: 0.4;
+      }
+    }
+  }
+}