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Reviewer's GuideThis pull request introduces a new JavaScript utility function File-Level Changes
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Pull Request Overview
This PR updates the project version and introduces a new JavaScript utility function to draw an image on a canvas with proper scaling for device pixel ratios.
- Updated project version in BootstrapBlazor.csproj
- Added the drawImage function in utility.js
Files not reviewed (1)
- src/BootstrapBlazor/BootstrapBlazor.csproj: Language not supported
| canvas.height = offsetHeight * devicePixelRatio; | ||
| canvas.style.width = `${offsetWidth}px`; | ||
| canvas.style.height = `${offsetHeight}px`; | ||
| const context = canvas.getContext('2d'); |
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Consider verifying that canvas.getContext('2d') returns a valid context object before applying transformations and drawing the image.
Suggested change
| const context = canvas.getContext('2d'); | |
| const context = canvas.getContext('2d'); | |
| if (!context) { | |
| console.error("Failed to get 2D context from canvas."); | |
| return; | |
| } |
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| canvas.width = offsetWidth * devicePixelRatio; | ||
| canvas.height = offsetHeight * devicePixelRatio; | ||
| canvas.style.width = `${offsetWidth}px`; | ||
| canvas.style.height = `${offsetHeight}px`; | ||
| const context = canvas.getContext('2d'); | ||
| context.scale(devicePixelRatio, devicePixelRatio); |
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[nitpick] Consider assigning window.devicePixelRatio to a local variable if used multiple times for improved clarity and potential performance benefits.
Suggested change
| canvas.width = offsetWidth * devicePixelRatio; | |
| canvas.height = offsetHeight * devicePixelRatio; | |
| canvas.style.width = `${offsetWidth}px`; | |
| canvas.style.height = `${offsetHeight}px`; | |
| const context = canvas.getContext('2d'); | |
| context.scale(devicePixelRatio, devicePixelRatio); | |
| const pixelRatio = window.devicePixelRatio; | |
| canvas.width = offsetWidth * pixelRatio; | |
| canvas.height = offsetHeight * pixelRatio; | |
| canvas.style.width = `${offsetWidth}px`; | |
| canvas.style.height = `${offsetHeight}px`; | |
| const context = canvas.getContext('2d'); | |
| context.scale(pixelRatio, pixelRatio); |
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Hey @ArgoZhang - I've reviewed your changes - here's some feedback:
- The
drawImagefunction could be made more flexible by accepting an existing canvas context instead of retrieving it internally.
Here's what I looked at during the review
- 🟡 General issues: 1 issue found
- 🟢 Security: all looks good
- 🟢 Testing: all looks good
- 🟢 Complexity: all looks good
- 🟢 Documentation: all looks good
Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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| const context = canvas.getContext('2d'); | ||
| context.scale(devicePixelRatio, devicePixelRatio); | ||
| context.drawImage(image, 0, 0, offsetWidth, offsetHeight); |
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suggestion: Handle potential null from getContext('2d').
Verify canvas.getContext('2d') returns a non-null context before scaling or drawing the image.
Suggested change
| const context = canvas.getContext('2d'); | |
| context.scale(devicePixelRatio, devicePixelRatio); | |
| context.drawImage(image, 0, 0, offsetWidth, offsetHeight); | |
| const context = canvas.getContext('2d'); | |
| if (context) { | |
| context.scale(devicePixelRatio, devicePixelRatio); | |
| context.drawImage(image, 0, 0, offsetWidth, offsetHeight); | |
| } else { | |
| console.error('2D context not available on canvas.'); | |
| } |
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #5938 +/- ##
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Coverage 100.00% 100.00%
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Files 665 665
Lines 30485 30485
Branches 4345 4345
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Hits 30485 30485 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Link issues
fixes #5937
Summary By Copilot
This pull request includes a version update in the project file and adds a new utility function for drawing images on a canvas in the JavaScript module. Below are the details:
Project Version Update:
src/BootstrapBlazor/BootstrapBlazor.csproj: Updated the project version from9.6.1-beta01to9.6.1-beta02.JavaScript Utility Enhancement:
src/BootstrapBlazor/wwwroot/modules/utility.js: Added a newdrawImagefunction to handle drawing images on a canvas with proper scaling for device pixel ratios.Regression?
Risk
Verification
Packaging changes reviewed?
☑️ Self Check before Merge
Summary by Sourcery
Add a new utility function for drawing images on canvas with proper device pixel ratio scaling
New Features:
drawImagemethod in utility.js to handle canvas image drawing with device pixel ratio supportChores: