From 27218d1119e529b8fc221cfd20c3eae23fc7c4ce Mon Sep 17 00:00:00 2001
From: Guy Sandler <guy@sandler.co.il>
Date: Fri, 16 Jan 2026 14:10:10 -0800
Subject: [PATCH] gpa presets

---
 README.md       |  3 +++
 html/popup.html |  5 +++--
 js/popup.js     | 41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 5a1f5fc..0679666 100644
--- a/README.md
+++ b/README.md
@@ -299,3 +299,6 @@ here is some proof the lisence was changed and this is based on the reverted MIT
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
 ![Better Canvas](/icon/icon-48.png)
+
+Copyright (c) 2026 Guy Sandler
+
diff --git a/html/popup.html b/html/popup.html
index 49aeac3..883511e 100644
--- a/html/popup.html
+++ b/html/popup.html
@@ -696,8 +696,9 @@
                 The letter grade will be calculated as greater than or equal to the percentage given. <br><br>
                 If your school doesn't use the +/- system, you can enter 101 for those grades to remove them from the
                 calculation. (for example A+ = 101, A = 90, A- = 101)
-                <button class="big-button gpa-plus-minus">+/- GPA Scale</button>
-                <button class="big-button gpa-by-letter">By Letter GPA Scale</button>
+                <h3 class="header-small" style="margin-top: 20px;">GPA Scale Presets 0-4</h3>
+                <button class="big-button" id="gpa-plus-minus">+/- GPA Scale</button>
+                <button class="big-button" id="gpa-by-letter">By Letter GPA Scale</button>
             </div>
             
         </div>
diff --git a/js/popup.js b/js/popup.js
index 8d7132c..5fcbaa2 100644
--- a/js/popup.js
+++ b/js/popup.js
@@ -563,6 +563,47 @@ function setup() {
     // document.getElementById("view-submissions-btn").addEventListener("click", displayMySubmissions);
     document.getElementById("submit-form-btn").addEventListener("click", displayThemeSubmissionForm);
 
+    document.getElementById("gpa-plus-minus").addEventListener("click", () => {
+        applyGPAPreset({
+            "A+": { "cutoff": 97, "gpa": 4.0 },
+            "A": { "cutoff": 93, "gpa": 4.0 },
+            "A-": { "cutoff": 90, "gpa": 3.7 },
+            "B+": { "cutoff": 87, "gpa": 3.3 },
+            "B": { "cutoff": 83, "gpa": 3.0 },
+            "B-": { "cutoff": 80, "gpa": 2.7 },
+            "C+": { "cutoff": 77, "gpa": 2.3 },
+            "C": { "cutoff": 73, "gpa": 2.0 },
+            "C-": { "cutoff": 70, "gpa": 1.7 },
+            "D+": { "cutoff": 67, "gpa": 1.3 },
+            "D": { "cutoff": 63, "gpa": 1.0 },
+            "D-": { "cutoff": 60, "gpa": 0.7 },
+            "F": { "cutoff": 0, "gpa": 0 }
+        });
+    });
+    document.getElementById("gpa-by-letter").addEventListener("click", () => {
+        applyGPAPreset({
+            "A+": { "cutoff": 90, "gpa": 4.0 },
+            "A": { "cutoff": 80, "gpa": 4.0 },
+            "A-": { "cutoff": 70, "gpa": 4.0 },
+            "B+": { "cutoff": 65, "gpa": 3.0 },
+            "B": { "cutoff": 60, "gpa": 3.0 },
+            "B-": { "cutoff": 55, "gpa": 3.0 },
+            "C+": { "cutoff": 50, "gpa": 2.0 },
+            "C": { "cutoff": 45, "gpa": 2.0 },
+            "C-": { "cutoff": 40, "gpa": 2.0 },
+            "D+": { "cutoff": 35, "gpa": 1.0 },
+            "D": { "cutoff": 30, "gpa": 1.0 },
+            "D-": { "cutoff": 25, "gpa": 1.0 },
+            "F": { "cutoff": 0, "gpa": 0 }
+        });
+    });
+
+}
+
+function applyGPAPreset(bounds) {
+    chrome.storage.sync.set({ "gpa_calc_bounds": bounds }, () => {
+        displayGPABounds();
+    });
 }
 
 function setupCustomStyle(initial) {