741 lines
28 KiB
JavaScript
741 lines
28 KiB
JavaScript
// ==========================================
|
||
// Mermaid Diagram Renderer — Browser Extension
|
||
// ==========================================
|
||
// Renders ```mermaid code blocks as interactive SVG diagrams.
|
||
// Features: viewBox-based zoom/pan, fullscreen mode, SVG/PNG export, source copy.
|
||
// Loads mermaid.js dynamically on first use.
|
||
// ==========================================
|
||
|
||
Extensions.register({
|
||
id: 'mermaid-renderer',
|
||
|
||
_mermaidReady: false,
|
||
_mermaidLoading: null,
|
||
|
||
async init(ctx) {
|
||
const self = this;
|
||
|
||
// ── Inject styles ──
|
||
this._injectStyles();
|
||
|
||
// ── Block renderer: match ```mermaid, output placeholder ──
|
||
ctx.renderers.register('mermaid', {
|
||
type: 'block',
|
||
pattern: 'mermaid',
|
||
priority: 10,
|
||
render(lang, code, container) {
|
||
const id = 'mmd-' + Math.random().toString(36).slice(2, 9);
|
||
container.innerHTML = `
|
||
<div class="mermaid-block" data-mermaid-id="${id}">
|
||
<div class="mermaid-toolbar">
|
||
<span class="mermaid-title">📊 Diagram</span>
|
||
<span class="mermaid-zoom-label" data-zoom-label="${id}">100%</span>
|
||
<div class="mermaid-toolbar-btns">
|
||
<button class="mmd-btn" data-action="zoom-in" data-target="${id}" title="Zoom in">+</button>
|
||
<button class="mmd-btn" data-action="zoom-out" data-target="${id}" title="Zoom out">−</button>
|
||
<button class="mmd-btn" data-action="zoom-fit" data-target="${id}" title="Fit to view">⊡</button>
|
||
<button class="mmd-btn" data-action="zoom-reset" data-target="${id}" title="Reset zoom">1:1</button>
|
||
<span class="mmd-sep"></span>
|
||
<button class="mmd-btn" data-action="fullscreen" data-target="${id}" title="Toggle fullscreen">⛶</button>
|
||
<span class="mmd-sep"></span>
|
||
<button class="mmd-btn" data-action="export-svg" data-target="${id}" title="Download SVG">SVG</button>
|
||
<button class="mmd-btn" data-action="export-png" data-target="${id}" title="Download PNG">PNG</button>
|
||
</div>
|
||
</div>
|
||
<div class="mermaid-viewport" data-viewport="${id}">
|
||
<div class="mermaid-diagram" data-mermaid-src="${encodeURIComponent(code.trim())}" data-diagram="${id}">
|
||
<div class="mermaid-loading">
|
||
<span class="mermaid-spinner"></span> Rendering diagram…
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<details class="mermaid-source">
|
||
<summary>
|
||
<span>📋 View source</span>
|
||
<button class="mmd-btn mmd-copy-src" data-action="copy-src" data-target="${id}" title="Copy source" onclick="event.stopPropagation()">Copy</button>
|
||
</summary>
|
||
<pre><code class="language-mermaid" data-source="${id}">${self._escapeHtml(code.trim())}</code></pre>
|
||
</details>
|
||
</div>
|
||
`;
|
||
}
|
||
});
|
||
|
||
// ── Post renderer: render diagrams + wire interactivity ──
|
||
ctx.renderers.register('mermaid-post', {
|
||
type: 'post',
|
||
priority: 10,
|
||
render(container) {
|
||
const diagrams = container.querySelectorAll('.mermaid-diagram[data-mermaid-src]');
|
||
if (diagrams.length === 0) return;
|
||
|
||
diagrams.forEach(el => {
|
||
if (el.dataset.rendered) return;
|
||
el.dataset.rendered = 'pending';
|
||
self._renderDiagram(el);
|
||
});
|
||
|
||
// Wire toolbar buttons (event delegation on the container)
|
||
self._wireToolbar(container);
|
||
}
|
||
});
|
||
|
||
// Pre-load mermaid library
|
||
this._loadMermaid();
|
||
},
|
||
|
||
// ── ViewBox Zoom/Pan State ──────────────
|
||
|
||
// State stores the current viewBox and the original (natural) viewBox
|
||
// for computing zoom level relative to the full diagram.
|
||
_getState(id) {
|
||
const vp = document.querySelector(`[data-viewport="${id}"]`);
|
||
if (!vp) return null;
|
||
if (!vp._mmdState) {
|
||
vp._mmdState = {
|
||
// Natural (full) viewBox from the SVG — set after render
|
||
natX: 0, natY: 0, natW: 0, natH: 0,
|
||
// Current viewBox
|
||
vbX: 0, vbY: 0, vbW: 0, vbH: 0,
|
||
// Drag state
|
||
dragging: false, startX: 0, startY: 0,
|
||
startVbX: 0, startVbY: 0,
|
||
// Track initialization
|
||
ready: false,
|
||
};
|
||
}
|
||
return vp._mmdState;
|
||
},
|
||
|
||
// Call after SVG is rendered to capture the natural viewBox
|
||
_initState(id) {
|
||
const state = this._getState(id);
|
||
if (!state) return;
|
||
const svg = document.querySelector(`[data-diagram="${id}"] svg`);
|
||
if (!svg) return;
|
||
|
||
// Parse the SVG's viewBox
|
||
const vb = svg.getAttribute('viewBox');
|
||
if (!vb) {
|
||
// No viewBox — create one from the SVG's rendered size
|
||
const bbox = svg.getBBox();
|
||
state.natX = bbox.x;
|
||
state.natY = bbox.y;
|
||
state.natW = bbox.width;
|
||
state.natH = bbox.height;
|
||
} else {
|
||
const parts = vb.trim().split(/[\s,]+/).map(Number);
|
||
state.natX = parts[0] || 0;
|
||
state.natY = parts[1] || 0;
|
||
state.natW = parts[2] || 0;
|
||
state.natH = parts[3] || 0;
|
||
}
|
||
|
||
// Start with the full diagram visible
|
||
state.vbX = state.natX;
|
||
state.vbY = state.natY;
|
||
state.vbW = state.natW;
|
||
state.vbH = state.natH;
|
||
state.ready = true;
|
||
|
||
this._applyViewBox(id);
|
||
},
|
||
|
||
_applyViewBox(id) {
|
||
const state = this._getState(id);
|
||
if (!state || !state.ready) return;
|
||
const svg = document.querySelector(`[data-diagram="${id}"] svg`);
|
||
if (!svg) return;
|
||
|
||
svg.setAttribute('viewBox', `${state.vbX} ${state.vbY} ${state.vbW} ${state.vbH}`);
|
||
|
||
// Update zoom label — zoom = natural width / current width
|
||
const zoomPct = Math.round((state.natW / state.vbW) * 100);
|
||
const label = document.querySelector(`[data-zoom-label="${id}"]`);
|
||
if (label) label.textContent = zoomPct + '%';
|
||
},
|
||
|
||
// Zoom toward/away from center of current view
|
||
_zoom(id, factor) {
|
||
const state = this._getState(id);
|
||
if (!state || !state.ready) return;
|
||
|
||
// factor > 0 = zoom in (shrink viewBox), factor < 0 = zoom out
|
||
const scale = 1 / (1 + factor);
|
||
|
||
const newW = state.vbW * scale;
|
||
const newH = state.vbH * scale;
|
||
|
||
// Clamp: don't zoom out beyond 0.5x natural, don't zoom in beyond 20x
|
||
const minW = state.natW / 20;
|
||
const maxW = state.natW * 2;
|
||
if (newW < minW || newW > maxW) return;
|
||
|
||
// Keep the center point stable
|
||
const cx = state.vbX + state.vbW / 2;
|
||
const cy = state.vbY + state.vbH / 2;
|
||
|
||
state.vbW = newW;
|
||
state.vbH = newH;
|
||
state.vbX = cx - newW / 2;
|
||
state.vbY = cy - newH / 2;
|
||
|
||
this._applyViewBox(id);
|
||
},
|
||
|
||
// Zoom centered on a specific viewport pixel coordinate
|
||
_zoomAt(id, factor, clientX, clientY) {
|
||
const state = this._getState(id);
|
||
if (!state || !state.ready) return;
|
||
const svg = document.querySelector(`[data-diagram="${id}"] svg`);
|
||
if (!svg) return;
|
||
|
||
const svgRect = svg.getBoundingClientRect();
|
||
if (svgRect.width === 0 || svgRect.height === 0) return;
|
||
|
||
// Map client coords to viewBox coords (the point we want to keep stable)
|
||
const fx = (clientX - svgRect.left) / svgRect.width;
|
||
const fy = (clientY - svgRect.top) / svgRect.height;
|
||
const pointX = state.vbX + fx * state.vbW;
|
||
const pointY = state.vbY + fy * state.vbH;
|
||
|
||
const scale = 1 / (1 + factor);
|
||
const newW = state.vbW * scale;
|
||
const newH = state.vbH * scale;
|
||
|
||
const minW = state.natW / 20;
|
||
const maxW = state.natW * 2;
|
||
if (newW < minW || newW > maxW) return;
|
||
|
||
// Keep the mouse point at the same fractional position
|
||
state.vbW = newW;
|
||
state.vbH = newH;
|
||
state.vbX = pointX - fx * newW;
|
||
state.vbY = pointY - fy * newH;
|
||
|
||
this._applyViewBox(id);
|
||
},
|
||
|
||
_zoomReset(id) {
|
||
const state = this._getState(id);
|
||
if (!state || !state.ready) return;
|
||
state.vbX = state.natX;
|
||
state.vbY = state.natY;
|
||
state.vbW = state.natW;
|
||
state.vbH = state.natH;
|
||
this._applyViewBox(id);
|
||
},
|
||
|
||
_zoomFit(id) {
|
||
// Fit = show the full diagram, same as reset
|
||
// but adjust aspect ratio to match viewport
|
||
const state = this._getState(id);
|
||
if (!state || !state.ready) return;
|
||
const vp = document.querySelector(`[data-viewport="${id}"]`);
|
||
if (!vp) return;
|
||
|
||
const vpRect = vp.getBoundingClientRect();
|
||
if (vpRect.width === 0 || vpRect.height === 0) return;
|
||
|
||
const vpAspect = vpRect.width / vpRect.height;
|
||
const natAspect = state.natW / state.natH;
|
||
|
||
// Reset to natural, then expand the smaller dimension to fill viewport
|
||
if (vpAspect > natAspect) {
|
||
// Viewport is wider — expand width to match
|
||
const newW = state.natH * vpAspect;
|
||
state.vbX = state.natX - (newW - state.natW) / 2;
|
||
state.vbY = state.natY;
|
||
state.vbW = newW;
|
||
state.vbH = state.natH;
|
||
} else {
|
||
// Viewport is taller — expand height to match
|
||
const newH = state.natW / vpAspect;
|
||
state.vbX = state.natX;
|
||
state.vbY = state.natY - (newH - state.natH) / 2;
|
||
state.vbW = state.natW;
|
||
state.vbH = newH;
|
||
}
|
||
|
||
this._applyViewBox(id);
|
||
},
|
||
|
||
// ── Fullscreen ──────────────────────────
|
||
|
||
_toggleFullscreen(id) {
|
||
const block = document.querySelector(`[data-mermaid-id="${id}"]`);
|
||
if (!block) return;
|
||
|
||
const isFS = block.classList.toggle('mermaid-fullscreen');
|
||
const btn = block.querySelector('[data-action="fullscreen"]');
|
||
|
||
if (isFS) {
|
||
// Entering fullscreen
|
||
if (btn) btn.textContent = '✕';
|
||
document.body.style.overflow = 'hidden';
|
||
|
||
// Escape key listener
|
||
block._mmdEscHandler = (e) => {
|
||
if (e.key === 'Escape') this._toggleFullscreen(id);
|
||
};
|
||
document.addEventListener('keydown', block._mmdEscHandler);
|
||
|
||
// Re-fit after layout change
|
||
requestAnimationFrame(() => this._zoomFit(id));
|
||
} else {
|
||
// Exiting fullscreen
|
||
if (btn) btn.textContent = '⛶';
|
||
document.body.style.overflow = '';
|
||
if (block._mmdEscHandler) {
|
||
document.removeEventListener('keydown', block._mmdEscHandler);
|
||
delete block._mmdEscHandler;
|
||
}
|
||
}
|
||
},
|
||
|
||
// ── Toolbar Wiring ──────────────────────
|
||
|
||
_wireToolbar(container) {
|
||
const self = this;
|
||
|
||
// Skip if already wired
|
||
if (container._mmdWired) return;
|
||
container._mmdWired = true;
|
||
|
||
// Button clicks (delegation)
|
||
container.addEventListener('click', (e) => {
|
||
const btn = e.target.closest('[data-action]');
|
||
if (!btn) return;
|
||
const action = btn.dataset.action;
|
||
const id = btn.dataset.target;
|
||
if (!id) return;
|
||
|
||
switch (action) {
|
||
case 'zoom-in': self._zoom(id, 0.25); break;
|
||
case 'zoom-out': self._zoom(id, -0.2); break;
|
||
case 'zoom-reset': self._zoomReset(id); break;
|
||
case 'zoom-fit': self._zoomFit(id); break;
|
||
case 'fullscreen': self._toggleFullscreen(id); break;
|
||
case 'export-svg': self._exportSVG(id); break;
|
||
case 'export-png': self._exportPNG(id); break;
|
||
case 'copy-src': self._copySource(id, btn); break;
|
||
}
|
||
});
|
||
|
||
// Wire each viewport for mouse/touch interaction
|
||
container.querySelectorAll('.mermaid-viewport').forEach(vp => {
|
||
if (vp._mmdWired) return;
|
||
vp._mmdWired = true;
|
||
const id = vp.dataset.viewport;
|
||
|
||
// Mouse wheel zoom — centered on cursor position
|
||
vp.addEventListener('wheel', (e) => {
|
||
e.preventDefault();
|
||
const delta = e.deltaY > 0 ? -0.1 : 0.1;
|
||
self._zoomAt(id, delta, e.clientX, e.clientY);
|
||
}, { passive: false });
|
||
|
||
// Pan: mousedown → mousemove → mouseup
|
||
vp.addEventListener('mousedown', (e) => {
|
||
if (e.button !== 0) return;
|
||
const state = self._getState(id);
|
||
if (!state || !state.ready) return;
|
||
state.dragging = true;
|
||
state.startX = e.clientX;
|
||
state.startY = e.clientY;
|
||
state.startVbX = state.vbX;
|
||
state.startVbY = state.vbY;
|
||
vp.classList.add('mmd-grabbing');
|
||
e.preventDefault();
|
||
});
|
||
|
||
vp.addEventListener('mousemove', (e) => {
|
||
const state = self._getState(id);
|
||
if (!state?.dragging) return;
|
||
const svg = document.querySelector(`[data-diagram="${id}"] svg`);
|
||
if (!svg) return;
|
||
|
||
const svgRect = svg.getBoundingClientRect();
|
||
if (svgRect.width === 0) return;
|
||
|
||
// Convert pixel delta to viewBox delta
|
||
const pxToVb = state.vbW / svgRect.width;
|
||
const dx = (e.clientX - state.startX) * pxToVb;
|
||
const dy = (e.clientY - state.startY) * pxToVb;
|
||
|
||
state.vbX = state.startVbX - dx;
|
||
state.vbY = state.startVbY - dy;
|
||
self._applyViewBox(id);
|
||
});
|
||
|
||
const endDrag = () => {
|
||
const state = self._getState(id);
|
||
if (!state) return;
|
||
state.dragging = false;
|
||
vp.classList.remove('mmd-grabbing');
|
||
};
|
||
vp.addEventListener('mouseup', endDrag);
|
||
vp.addEventListener('mouseleave', endDrag);
|
||
|
||
// Touch: single-finger pan, two-finger pinch zoom
|
||
let lastTouchDist = 0;
|
||
let lastTouchCenter = null;
|
||
vp.addEventListener('touchstart', (e) => {
|
||
const state = self._getState(id);
|
||
if (!state || !state.ready) return;
|
||
if (e.touches.length === 1) {
|
||
state.dragging = true;
|
||
state.startX = e.touches[0].clientX;
|
||
state.startY = e.touches[0].clientY;
|
||
state.startVbX = state.vbX;
|
||
state.startVbY = state.vbY;
|
||
} else if (e.touches.length === 2) {
|
||
lastTouchDist = Math.hypot(
|
||
e.touches[0].clientX - e.touches[1].clientX,
|
||
e.touches[0].clientY - e.touches[1].clientY
|
||
);
|
||
lastTouchCenter = {
|
||
x: (e.touches[0].clientX + e.touches[1].clientX) / 2,
|
||
y: (e.touches[0].clientY + e.touches[1].clientY) / 2,
|
||
};
|
||
}
|
||
}, { passive: true });
|
||
|
||
vp.addEventListener('touchmove', (e) => {
|
||
const state = self._getState(id);
|
||
if (!state || !state.ready) return;
|
||
if (e.touches.length === 1 && state.dragging) {
|
||
const svg = document.querySelector(`[data-diagram="${id}"] svg`);
|
||
if (!svg) return;
|
||
const svgRect = svg.getBoundingClientRect();
|
||
if (svgRect.width === 0) return;
|
||
|
||
const pxToVb = state.vbW / svgRect.width;
|
||
const dx = (e.touches[0].clientX - state.startX) * pxToVb;
|
||
const dy = (e.touches[0].clientY - state.startY) * pxToVb;
|
||
state.vbX = state.startVbX - dx;
|
||
state.vbY = state.startVbY - dy;
|
||
self._applyViewBox(id);
|
||
e.preventDefault();
|
||
} else if (e.touches.length === 2) {
|
||
const dist = Math.hypot(
|
||
e.touches[0].clientX - e.touches[1].clientX,
|
||
e.touches[0].clientY - e.touches[1].clientY
|
||
);
|
||
const center = {
|
||
x: (e.touches[0].clientX + e.touches[1].clientX) / 2,
|
||
y: (e.touches[0].clientY + e.touches[1].clientY) / 2,
|
||
};
|
||
if (lastTouchDist > 0) {
|
||
const factor = (dist - lastTouchDist) / lastTouchDist;
|
||
self._zoomAt(id, factor, center.x, center.y);
|
||
}
|
||
lastTouchDist = dist;
|
||
lastTouchCenter = center;
|
||
e.preventDefault();
|
||
}
|
||
}, { passive: false });
|
||
|
||
vp.addEventListener('touchend', () => {
|
||
const state = self._getState(id);
|
||
if (state) state.dragging = false;
|
||
lastTouchDist = 0;
|
||
lastTouchCenter = null;
|
||
}, { passive: true });
|
||
});
|
||
},
|
||
|
||
// ── Export ───────────────────────────────
|
||
|
||
_exportSVG(id) {
|
||
const diagram = document.querySelector(`[data-diagram="${id}"]`);
|
||
const svg = diagram?.querySelector('svg');
|
||
if (!svg) return;
|
||
|
||
// Export with the natural viewBox (full diagram)
|
||
const state = this._getState(id);
|
||
const clone = svg.cloneNode(true);
|
||
clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
|
||
if (state?.ready) {
|
||
clone.setAttribute('viewBox', `${state.natX} ${state.natY} ${state.natW} ${state.natH}`);
|
||
}
|
||
const blob = new Blob([clone.outerHTML], { type: 'image/svg+xml' });
|
||
this._download(blob, `diagram-${id}.svg`);
|
||
},
|
||
|
||
_exportPNG(id) {
|
||
const diagram = document.querySelector(`[data-diagram="${id}"]`);
|
||
const svg = diagram?.querySelector('svg');
|
||
if (!svg) return;
|
||
|
||
const state = this._getState(id);
|
||
const clone = svg.cloneNode(true);
|
||
clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
|
||
// Export full diagram at natural size
|
||
if (state?.ready) {
|
||
clone.setAttribute('viewBox', `${state.natX} ${state.natY} ${state.natW} ${state.natH}`);
|
||
clone.setAttribute('width', state.natW);
|
||
clone.setAttribute('height', state.natH);
|
||
}
|
||
|
||
const svgData = new XMLSerializer().serializeToString(clone);
|
||
const svgBlob = new Blob([svgData], { type: 'image/svg+xml;charset=utf-8' });
|
||
const url = URL.createObjectURL(svgBlob);
|
||
const self = this;
|
||
|
||
const img = new Image();
|
||
img.onload = () => {
|
||
const scale = 2; // 2x for retina
|
||
const canvas = document.createElement('canvas');
|
||
canvas.width = img.naturalWidth * scale;
|
||
canvas.height = img.naturalHeight * scale;
|
||
const ctx = canvas.getContext('2d');
|
||
ctx.scale(scale, scale);
|
||
ctx.drawImage(img, 0, 0);
|
||
URL.revokeObjectURL(url);
|
||
|
||
canvas.toBlob((blob) => {
|
||
if (blob) self._download(blob, `diagram-${id}.png`);
|
||
}, 'image/png');
|
||
};
|
||
img.onerror = () => {
|
||
URL.revokeObjectURL(url);
|
||
console.error('[Mermaid] PNG export failed');
|
||
};
|
||
img.src = url;
|
||
},
|
||
|
||
_download(blob, filename) {
|
||
const a = document.createElement('a');
|
||
a.href = URL.createObjectURL(blob);
|
||
a.download = filename;
|
||
document.body.appendChild(a);
|
||
a.click();
|
||
document.body.removeChild(a);
|
||
setTimeout(() => URL.revokeObjectURL(a.href), 1000);
|
||
},
|
||
|
||
_copySource(id, btn) {
|
||
const code = document.querySelector(`[data-source="${id}"]`);
|
||
if (!code) return;
|
||
navigator.clipboard.writeText(code.textContent).then(() => {
|
||
const orig = btn.textContent;
|
||
btn.textContent = '✓';
|
||
setTimeout(() => { btn.textContent = orig; }, 1500);
|
||
});
|
||
},
|
||
|
||
// ── Diagram Rendering ───────────────────
|
||
|
||
async _renderDiagram(el) {
|
||
const code = decodeURIComponent(el.dataset.mermaidSrc);
|
||
const id = el.dataset.diagram;
|
||
|
||
try {
|
||
await this._loadMermaid();
|
||
|
||
const svgId = 'mmd-svg-' + Math.random().toString(36).slice(2, 9);
|
||
const { svg } = await mermaid.render(svgId, code);
|
||
el.innerHTML = svg;
|
||
el.dataset.rendered = 'true';
|
||
|
||
const svgEl = el.querySelector('svg');
|
||
if (svgEl) {
|
||
svgEl.removeAttribute('height');
|
||
svgEl.setAttribute('width', '100%');
|
||
svgEl.style.maxWidth = 'none';
|
||
// preserveAspectRatio ensures the viewBox maps cleanly
|
||
svgEl.setAttribute('preserveAspectRatio', 'xMidYMid meet');
|
||
}
|
||
|
||
// Initialize viewBox-based zoom state
|
||
this._initState(id);
|
||
} catch (e) {
|
||
el.innerHTML = `
|
||
<div class="mermaid-error">
|
||
<strong>Diagram error:</strong> ${this._escapeHtml(e.message || String(e))}
|
||
</div>
|
||
`;
|
||
el.dataset.rendered = 'error';
|
||
}
|
||
},
|
||
|
||
// ── Mermaid Library Loading ──────────────
|
||
|
||
_loadMermaid() {
|
||
if (this._mermaidReady) return Promise.resolve();
|
||
if (this._mermaidLoading) return this._mermaidLoading;
|
||
|
||
this._mermaidLoading = new Promise((resolve, reject) => {
|
||
if (typeof mermaid !== 'undefined') {
|
||
this._initMermaid();
|
||
this._mermaidReady = true;
|
||
resolve();
|
||
return;
|
||
}
|
||
|
||
const base = (window.__BASE__ || '');
|
||
const localSrc = `${base}/vendor/mermaid/mermaid.min.js`;
|
||
const cdnSrc = 'https://cdn.jsdelivr.net/npm/mermaid@11/dist/mermaid.min.js';
|
||
|
||
const script = document.createElement('script');
|
||
script.src = localSrc;
|
||
script.onload = () => {
|
||
this._initMermaid();
|
||
this._mermaidReady = true;
|
||
resolve();
|
||
};
|
||
script.onerror = () => {
|
||
console.warn('[Mermaid] Local vendor not found, trying CDN');
|
||
const cdn = document.createElement('script');
|
||
cdn.src = cdnSrc;
|
||
cdn.onload = () => {
|
||
this._initMermaid();
|
||
this._mermaidReady = true;
|
||
resolve();
|
||
};
|
||
cdn.onerror = () => {
|
||
console.error('[Mermaid] Failed to load from both local and CDN');
|
||
reject(new Error('Failed to load mermaid.js'));
|
||
};
|
||
document.head.appendChild(cdn);
|
||
};
|
||
document.head.appendChild(script);
|
||
});
|
||
|
||
return this._mermaidLoading;
|
||
},
|
||
|
||
_initMermaid() {
|
||
if (typeof mermaid === 'undefined') return;
|
||
|
||
const isDark = document.body.classList.contains('dark-theme') ||
|
||
window.matchMedia('(prefers-color-scheme: dark)').matches;
|
||
|
||
mermaid.initialize({
|
||
startOnLoad: false,
|
||
theme: isDark ? 'dark' : 'default',
|
||
securityLevel: 'strict',
|
||
fontFamily: 'inherit',
|
||
logLevel: 'error',
|
||
});
|
||
},
|
||
|
||
// ── Styles ──────────────────────────────
|
||
|
||
_injectStyles() {
|
||
if (document.getElementById('ext-style-mermaid-renderer')) return;
|
||
const style = document.createElement('style');
|
||
style.id = 'ext-style-mermaid-renderer';
|
||
style.textContent = `
|
||
.mermaid-block {
|
||
background: var(--bg-2); border: 1px solid var(--border);
|
||
border-radius: 8px; overflow: hidden; margin: 12px 0;
|
||
}
|
||
|
||
/* ── Fullscreen mode ── */
|
||
.mermaid-block.mermaid-fullscreen {
|
||
position: fixed; top: 0; left: 0; right: 0; bottom: 0;
|
||
z-index: 10000; border-radius: 0; margin: 0;
|
||
display: flex; flex-direction: column;
|
||
background: var(--bg-1, var(--bg-2, #1a1a2e));
|
||
}
|
||
.mermaid-block.mermaid-fullscreen .mermaid-viewport {
|
||
background: var(--bg-2, #1a1a2e);
|
||
}
|
||
.mermaid-block.mermaid-fullscreen .mermaid-viewport {
|
||
flex: 1; max-height: none;
|
||
}
|
||
.mermaid-block.mermaid-fullscreen .mermaid-toolbar {
|
||
border-bottom: 1px solid var(--border);
|
||
padding: 6px 14px;
|
||
}
|
||
|
||
/* Toolbar */
|
||
.mermaid-toolbar {
|
||
display: flex; align-items: center; gap: 6px;
|
||
padding: 4px 10px; border-bottom: 1px solid var(--border);
|
||
font-size: 12px; color: var(--text-3); flex-wrap: wrap;
|
||
}
|
||
.mermaid-title { font-weight: 600; color: var(--text-2); margin-right: auto; }
|
||
.mermaid-zoom-label {
|
||
font-family: var(--mono); font-size: 11px; min-width: 36px;
|
||
text-align: center; color: var(--text-3);
|
||
}
|
||
.mermaid-toolbar-btns { display: flex; gap: 2px; align-items: center; }
|
||
.mmd-btn {
|
||
background: none; border: 1px solid var(--border); border-radius: 4px;
|
||
padding: 1px 7px; font-size: 11px; cursor: pointer;
|
||
color: var(--text-3); font-family: var(--mono); line-height: 1.6;
|
||
}
|
||
.mmd-btn:hover { color: var(--text-1); border-color: var(--text-3); background: var(--bg-3); }
|
||
.mmd-sep { width: 1px; height: 16px; background: var(--border); margin: 0 4px; }
|
||
|
||
/* Viewport: contains the SVG, no overflow hidden needed — viewBox handles clipping */
|
||
.mermaid-viewport {
|
||
overflow: hidden; position: relative;
|
||
min-height: 80px; max-height: 600px;
|
||
cursor: grab; user-select: none;
|
||
}
|
||
.mermaid-viewport.mmd-grabbing { cursor: grabbing; }
|
||
|
||
/* Diagram wrapper */
|
||
.mermaid-diagram {
|
||
width: 100%; height: 100%; min-height: 60px;
|
||
}
|
||
.mermaid-diagram svg {
|
||
display: block; width: 100%; height: 100%;
|
||
}
|
||
|
||
/* Loading / Error */
|
||
.mermaid-loading {
|
||
color: var(--text-3); font-size: 13px; padding: 20px;
|
||
display: flex; align-items: center; justify-content: center; gap: 8px;
|
||
}
|
||
.mermaid-spinner {
|
||
display: inline-block; width: 14px; height: 14px;
|
||
border: 2px solid var(--border); border-top-color: var(--accent);
|
||
border-radius: 50%; animation: mmd-spin 0.8s linear infinite;
|
||
}
|
||
@keyframes mmd-spin { to { transform: rotate(360deg); } }
|
||
.mermaid-error {
|
||
color: var(--error, #e74c3c); background: var(--bg-3, rgba(231,76,60,0.1));
|
||
padding: 12px 16px; border-radius: 4px; font-size: 13px;
|
||
font-family: var(--mono); white-space: pre-wrap;
|
||
}
|
||
|
||
/* Source panel */
|
||
.mermaid-source { border-top: 1px solid var(--border); font-size: 12px; }
|
||
.mermaid-source summary {
|
||
padding: 6px 12px; cursor: pointer; color: var(--text-3);
|
||
user-select: none; display: flex; align-items: center; gap: 8px;
|
||
}
|
||
.mermaid-source summary:hover { color: var(--text-2); }
|
||
.mermaid-source summary span { flex: 1; }
|
||
.mmd-copy-src { font-size: 11px; }
|
||
.mermaid-source pre {
|
||
margin: 0; border-radius: 0; border: none;
|
||
max-height: 200px; overflow: auto;
|
||
}
|
||
|
||
/* Hide source panel in fullscreen — it's in the way */
|
||
.mermaid-block.mermaid-fullscreen .mermaid-source { display: none; }
|
||
`;
|
||
document.head.appendChild(style);
|
||
},
|
||
|
||
_escapeHtml(str) {
|
||
const div = document.createElement('div');
|
||
div.textContent = str;
|
||
return div.innerHTML;
|
||
},
|
||
|
||
destroy() {
|
||
document.getElementById('ext-style-mermaid-renderer')?.remove();
|
||
// Clean up any fullscreen state
|
||
document.querySelectorAll('.mermaid-fullscreen').forEach(el => {
|
||
el.classList.remove('mermaid-fullscreen');
|
||
});
|
||
document.body.style.overflow = '';
|
||
}
|
||
}); |