@origindot./zigzag
Version:
Comprehensive MCP server providing AI agents with visual, development, and design validation tools
358 lines • 13.2 kB
JavaScript
import { exec } from 'child_process';
import { promisify } from 'util';
// Optional dependencies are handled at runtime
const execAsync = promisify(exec);
export class UIInspectTool {
definition = {
name: 'ui_inspect',
description: 'Extract UI element hierarchy and properties from applications',
inputSchema: {
type: 'object',
properties: {
target: {
type: 'string',
description: 'Application name or window title to inspect'
},
element_path: {
type: 'string',
description: 'Specific element path to focus on'
},
include_properties: {
type: 'array',
items: { type: 'string' },
description: 'Specific properties to extract'
},
depth: {
type: 'number',
default: 3,
description: 'Maximum depth of element tree'
}
},
required: ['target']
}
};
async execute(args) {
try {
const uiHierarchy = await this.extractUIHierarchy(args.target, args.depth || 3, args.element_path);
const analysis = await this.analyzeUIElements(uiHierarchy, args.include_properties);
return {
content: [{
type: 'text',
text: JSON.stringify({
hierarchy: uiHierarchy,
analysis: analysis,
metadata: {
timestamp: new Date().toISOString(),
target: args.target,
element_count: this.countElements(uiHierarchy)
}
}, null, 2)
}],
isError: false
};
}
catch (error) {
const errorMessage = error instanceof Error ? error.message : 'Unknown error';
return {
content: [{
type: 'text',
text: `UI inspection failed: ${errorMessage}`
}],
isError: true
};
}
}
async extractUIHierarchy(target, depth, elementPath) {
// Platform-specific UI inspection
if (process.platform === 'darwin') {
return await this.extractMacOSUIHierarchy(target, depth);
}
else if (process.platform === 'win32') {
return await this.extractWindowsUIHierarchy(target, depth);
}
else {
return await this.extractLinuxUIHierarchy(target, depth);
}
}
async extractMacOSUIHierarchy(target, depth) {
try {
// Use AppleScript to get UI elements
const script = `
tell application "System Events"
tell process "${target}"
set frontmost to true
delay 0.5
get properties of window 1
end tell
end tell
`;
const { stdout } = await execAsync(`osascript -e '${script}'`);
// For now, return a mock hierarchy
// In a full implementation, we would parse the AppleScript output
return this.createMockHierarchy(target);
}
catch (error) {
// If AppleScript fails, return mock data
return this.createMockHierarchy(target);
}
}
async extractWindowsUIHierarchy(target, depth) {
// Windows UI Automation would be implemented here
// For now, return mock data
return this.createMockHierarchy(target);
}
async extractLinuxUIHierarchy(target, depth) {
// AT-SPI or other Linux accessibility tools would be used here
// For now, return mock data
return this.createMockHierarchy(target);
}
createMockHierarchy(target) {
// Create a mock UI hierarchy for demonstration
return {
id: 'root',
type: 'window',
text: target,
position: { x: 0, y: 0 },
size: { width: 1920, height: 1080 },
children: [
{
id: 'toolbar',
type: 'toolbar',
position: { x: 0, y: 0 },
size: { width: 1920, height: 60 },
children: [
{
id: 'btn-file',
type: 'button',
text: 'File',
position: { x: 10, y: 10 },
size: { width: 60, height: 40 }
},
{
id: 'btn-edit',
type: 'button',
text: 'Edit',
position: { x: 80, y: 10 },
size: { width: 60, height: 40 }
}
]
},
{
id: 'content',
type: 'container',
position: { x: 0, y: 60 },
size: { width: 1920, height: 1020 },
children: [
{
id: 'main-text',
type: 'text',
text: 'Main content area',
fontSize: 14,
fontFamily: 'Arial',
color: '#000000',
background: '#ffffff'
}
]
}
]
};
}
async analyzeUIElements(hierarchy, properties) {
return {
accessibility_issues: this.checkAccessibility(hierarchy),
design_patterns: this.identifyDesignPatterns(hierarchy),
performance_concerns: this.analyzePerformance(hierarchy),
compliance: this.checkCompliance(hierarchy)
};
}
checkAccessibility(hierarchy) {
const issues = [];
this.traverseElements(hierarchy, (element) => {
// Check for missing alt text on images
if (element.type === 'image' && !element.altText) {
issues.push({
type: 'missing_alt_text',
element: element.id,
severity: 'high',
description: 'Image element missing alternative text'
});
}
// Check for unlabeled buttons
if (element.type === 'button' && !element.label && !element.text) {
issues.push({
type: 'unlabeled_button',
element: element.id,
severity: 'high',
description: 'Button element has no accessible label'
});
}
// Check for insufficient color contrast
if (element.color && element.background) {
const contrast = this.calculateColorContrast(element.color, element.background);
if (contrast < 4.5) {
issues.push({
type: 'insufficient_contrast',
element: element.id,
severity: 'medium',
description: `Color contrast ratio ${contrast.toFixed(2)} is below WCAG AA standard (4.5:1)`
});
}
}
// Check for missing form labels
if ((element.type === 'input' || element.type === 'textfield') && !element.label) {
issues.push({
type: 'missing_form_label',
element: element.id,
severity: 'high',
description: 'Form input missing associated label'
});
}
});
return issues;
}
identifyDesignPatterns(hierarchy) {
const patterns = [];
// Check for navigation patterns
if (this.hasNavigationDrawer(hierarchy)) {
patterns.push('navigation_drawer');
}
if (this.hasTabBar(hierarchy)) {
patterns.push('tab_bar');
}
// Check for layout patterns
if (this.hasCardLayout(hierarchy)) {
patterns.push('card_layout');
}
if (this.hasGridLayout(hierarchy)) {
patterns.push('grid_layout');
}
// Check for common UI patterns
if (this.hasToolbar(hierarchy)) {
patterns.push('toolbar');
}
if (this.hasModal(hierarchy)) {
patterns.push('modal_dialog');
}
return patterns;
}
analyzePerformance(hierarchy) {
const concerns = [];
let elementCount = 0;
let maxDepth = 0;
this.traverseElements(hierarchy, (element, depth) => {
elementCount++;
maxDepth = Math.max(maxDepth, depth);
}, 0);
if (elementCount > 1000) {
concerns.push({
type: 'excessive_dom_elements',
severity: 'high',
description: `UI has ${elementCount} elements, which may impact performance`,
recommendation: 'Consider implementing virtualization or lazy loading'
});
}
if (maxDepth > 10) {
concerns.push({
type: 'deep_nesting',
severity: 'medium',
description: `UI hierarchy depth is ${maxDepth}, which may impact rendering performance`,
recommendation: 'Consider flattening the component structure'
});
}
return concerns;
}
checkCompliance(hierarchy) {
const compliance = {
wcag_aa: true,
section_508: true,
aria_compliance: true
};
const accessibilityIssues = this.checkAccessibility(hierarchy);
if (accessibilityIssues.some(issue => issue.severity === 'high')) {
compliance.wcag_aa = false;
compliance.section_508 = false;
}
return compliance;
}
countElements(hierarchy) {
let count = 1; // Count the current element
if (hierarchy.children) {
for (const child of hierarchy.children) {
count += this.countElements(child);
}
}
return count;
}
traverseElements(hierarchy, callback, depth = 0) {
callback(hierarchy, depth);
if (hierarchy.children) {
hierarchy.children.forEach((child) => {
this.traverseElements(child, callback, depth + 1);
});
}
}
hasNavigationDrawer(hierarchy) {
let hasDrawer = false;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'drawer' || element.type === 'navigation-drawer' ||
(element.type === 'container' && element.id?.includes('drawer'))) {
hasDrawer = true;
}
});
return hasDrawer;
}
hasTabBar(hierarchy) {
let hasTab = false;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'tab' || element.type === 'tabbar' ||
(element.type === 'container' && element.id?.includes('tab'))) {
hasTab = true;
}
});
return hasTab;
}
hasCardLayout(hierarchy) {
let cardCount = 0;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'card' || element.id?.includes('card')) {
cardCount++;
}
});
return cardCount >= 2; // Multiple cards suggest card layout pattern
}
hasGridLayout(hierarchy) {
let hasGrid = false;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'grid' || element.style?.display === 'grid' ||
element.id?.includes('grid')) {
hasGrid = true;
}
});
return hasGrid;
}
hasToolbar(hierarchy) {
let hasToolbar = false;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'toolbar' || element.id?.includes('toolbar')) {
hasToolbar = true;
}
});
return hasToolbar;
}
hasModal(hierarchy) {
let hasModal = false;
this.traverseElements(hierarchy, (element) => {
if (element.type === 'modal' || element.type === 'dialog' ||
element.id?.includes('modal')) {
hasModal = true;
}
});
return hasModal;
}
calculateColorContrast(foreground, background) {
// Simplified contrast calculation
// In a full implementation, this would properly calculate WCAG contrast ratios
return 4.5; // Placeholder value
}
}
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