C4 diagram is fixed style, such as css color, so different css is not provided under different skins.

updateElementStyle and UpdateElementStyle are written in the diagram last part. updateElementStyle is inconsistent with the original definition and updates the style of the relationship, including the offset of the text label relative to the original position.

- [ ] Custom tags/stereotypes support and skinparam updates
- - [ ] AddElementTag(tagStereo, ?bgColor, ?fontColor, ?borderColor, ?shadowing, ?shape, ?sprite, ?techn, ?legendText, ?legendSprite): Introduces a new element tag. The styles of the tagged elements are updated and the tag is displayed in the calculated legend.
- - [ ] AddRelTag(tagStereo, ?textColor, ?lineColor, ?lineStyle, ?sprite, ?techn, ?legendText, ?legendSprite): Introduces a new Relationship tag. The styles of the tagged relationships are updated and the tag is displayed in the calculated legend.
- - [X] UpdateElementStyle(elementName, ?bgColor, ?fontColor, ?borderColor, ?shadowing, ?shape, ?sprite, ?techn, ?legendText, ?legendSprite): This call updates the default style of the elements (component, ...) and creates no additional legend entry.
- - [X] UpdateRelStyle(from, to, textColor, lineColor, ?offsetX, ?offsetY): This call updates the default relationship colors and creates no additional legend entry. Two new parameters, offsetX and offsetY, are added to set the offset of the original position of the text.
- - [ ] RoundedBoxShape(): This call returns the name of the rounded box shape and can be used as ?shape argument.
- - [ ] EightSidedShape(): This call returns the name of the eight sided shape and can be used as ?shape argument.
- - [ ] DashedLine(): This call returns the name of the dashed line and can be used as ?lineStyle argument.
- - [ ] DottedLine(): This call returns the name of the dotted line and can be used as ?lineStyle argument.
- - [ ] BoldLine(): This call returns the name of the bold line and can be used as ?lineStyle argument.
- - [X] UpdateLayoutConfig(?c4ShapeInRow, ?c4BoundaryInRow): New. This call updates the default c4ShapeInRow(4) and c4BoundaryInRow(2).

src/diagrams/c4/c4Renderer.js

@@ -17,6 +17,9 @@ import addSVGAccessibilityFields from '../../accessibility';
 let globalBoundaryMaxX = 0,
   globalBoundaryMaxY = 0;
 
+let c4ShapeInRow = 4;
+let c4BoundaryInRow = 2;
+
 parser.yy = c4Db;
 
 let conf = {};
@@ -68,7 +71,7 @@ class Bounds {
     if (
       _startx >= this.data.widthLimit ||
       _stopx >= this.data.widthLimit ||
-      this.nextData.cnt > conf.c4ShapeInRow
+      this.nextData.cnt > c4ShapeInRow
     ) {
       _startx = this.nextData.startx + c4Shape.margin + conf.nextLinePaddingX;
       _starty = this.nextData.stopy + c4Shape.margin * 2;
@@ -448,7 +451,7 @@ function drawInsideBoundary(diagram, parentBoundaryAlias, parentBounds, currentB
   let currentBounds = new Bounds();
   // Calculate the width limit of the boundar.  label/type 的长度，
   currentBounds.data.widthLimit =
-    parentBounds.data.widthLimit / Math.min(conf.c4BoundaryInRow, currentBoundarys.length);
+    parentBounds.data.widthLimit / Math.min(c4BoundaryInRow, currentBoundarys.length);
   // Math.min(
   //   conf.width * conf.c4ShapeInRow + conf.c4ShapeMargin * conf.c4ShapeInRow * 2,
   //   parentBounds.data.widthLimit / Math.min(conf.c4BoundaryInRow, currentBoundarys.length)
@@ -507,7 +510,7 @@ function drawInsideBoundary(diagram, parentBoundaryAlias, parentBounds, currentB
       Y = currentBoundary['descr'].Y + currentBoundary['descr'].height;
     }
 
-    if (i == 0 || i % conf.c4BoundaryInRow === 0) {
+    if (i == 0 || i % c4BoundaryInRow === 0) {
       // Calculate the drawing start point of the currentBoundarys.
       let _x = parentBounds.data.startx + conf.diagramMarginX;
       let _y = parentBounds.data.stopy + conf.diagramMarginY + Y;
@@ -579,10 +582,15 @@ export const draw = function (text, id) {
       : select('body');
   const doc = securityLevel === 'sandbox' ? sandboxElement.nodes()[0].contentDocument : document;
 
+  let db = parser.yy;
+
   parser.yy.clear();
   parser.yy.setWrap(conf.wrap);
   parser.parse(text + '\n');
 
+  c4ShapeInRow = db.getC4ShapeInRow();
+  c4BoundaryInRow = db.getC4BoundaryInRow();
+
   log.debug(`C:${JSON.stringify(conf, null, 2)}`);
 
   const diagram =
@@ -593,6 +601,7 @@ export const draw = function (text, id) {
   svgDraw.insertClockIcon(diagram);
 
   let screenBounds = new Bounds();
+
   screenBounds.setData(
     conf.diagramMarginX,
     conf.diagramMarginX,