画布尺寸修改插件

2026-09-15 18:30:57 +08:00
1 parent 6a800280d4
commit d2d5d747df
@@ -0,0 +1,171 @@
+#target photoshop
+
+/*
+    Uniformly resize the current canvas area.
+    Scale range: 0.1 to 5
+    Default scale: 2
+
+    Layer contents are not scaled. The canvas expands or crops
+    equally from its center according to the entered scale.
+*/
+
+(function () {
+    function showMessage(text) {
+        alert(text);
+    }
+
+    if (app.documents.length === 0) {
+        showMessage("请先打开一个文档。");
+        return;
+    }
+
+    var document = app.activeDocument;
+    var currentWidth = Math.round(document.width.as("px"));
+    var currentHeight = Math.round(document.height.as("px"));
+
+    var dialog = new Window("dialog", "修改画布大小");
+    dialog.orientation = "column";
+    dialog.alignChildren = "fill";
+
+    // Method 1: uniformly resize with a scale slider and numeric input.
+    var scalePanel = dialog.add("panel", undefined, "方式一：等比例缩放");
+    scalePanel.orientation = "column";
+    scalePanel.alignChildren = "fill";
+
+    var scaleMode = scalePanel.add("radiobutton", undefined, "使用缩放倍率");
+    scaleMode.value = true;
+
+    var scaleGroup = scalePanel.add("group");
+    scaleGroup.orientation = "row";
+
+    var scaleSlider = scaleGroup.add("slider", undefined, 2, 0.1, 5);
+    scaleSlider.preferredSize.width = 220;
+
+    var scaleInput = scaleGroup.add("edittext", undefined, "2");
+    scaleInput.characters = 6;
+
+    scaleGroup.add("statictext", undefined, "倍（0.1 - 5）");
+
+    // Method 2: enter the target canvas width and height independently.
+    var sizePanel = dialog.add("panel", undefined, "方式二：指定宽高");
+    sizePanel.orientation = "column";
+    sizePanel.alignChildren = "left";
+
+    var sizeMode = sizePanel.add("radiobutton", undefined, "使用指定宽度和高度");
+
+    var widthGroup = sizePanel.add("group");
+    widthGroup.orientation = "row";
+    widthGroup.add("statictext", undefined, "宽度：");
+    var widthInput = widthGroup.add("edittext", undefined, String(currentWidth));
+    widthInput.characters = 10;
+    widthGroup.add("statictext", undefined, "px");
+
+    var heightGroup = sizePanel.add("group");
+    heightGroup.orientation = "row";
+    heightGroup.add("statictext", undefined, "高度：");
+    var heightInput = heightGroup.add("edittext", undefined, String(currentHeight));
+    heightInput.characters = 10;
+    heightGroup.add("statictext", undefined, "px");
+
+    var buttonGroup = dialog.add("group");
+    buttonGroup.alignment = "right";
+    var cancelButton = buttonGroup.add("button", undefined, "取消", { name: "cancel" });
+    var okButton = buttonGroup.add("button", undefined, "确定", { name: "ok" });
+
+    var resultWidth = null;
+    var resultHeight = null;
+
+    function parseNumber(text) {
+        return parseFloat(text.replace(",", "."));
+    }
+
+    function formatScale(value) {
+        return String(Math.round(value * 100) / 100);
+    }
+
+    function updateControlState() {
+        scaleSlider.enabled = scaleMode.value;
+        scaleInput.enabled = scaleMode.value;
+        widthInput.enabled = sizeMode.value;
+        heightInput.enabled = sizeMode.value;
+    }
+
+    scaleMode.onClick = function () {
+        scaleMode.value = true;
+        sizeMode.value = false;
+        updateControlState();
+    };
+
+    sizeMode.onClick = function () {
+        sizeMode.value = true;
+        scaleMode.value = false;
+        updateControlState();
+    };
+
+    scaleSlider.onChanging = function () {
+        scaleInput.text = formatScale(scaleSlider.value);
+    };
+
+    scaleInput.onChange = function () {
+        var value = parseNumber(scaleInput.text);
+        if (!isNaN(value) && value >= 0.1 && value <= 5) {
+            scaleSlider.value = value;
+            scaleInput.text = formatScale(value);
+        }
+    };
+
+    okButton.onClick = function () {
+        if (scaleMode.value) {
+            var scaleValue = parseNumber(scaleInput.text);
+
+            if (isNaN(scaleValue) || scaleValue < 0.1 || scaleValue > 5) {
+                showMessage("请输入 0.1 到 5 之间的缩放倍率。");
+                scaleInput.active = true;
+                return;
+            }
+
+            resultWidth = Math.max(1, Math.round(currentWidth * scaleValue));
+            resultHeight = Math.max(1, Math.round(currentHeight * scaleValue));
+        } else {
+            var widthValue = parseNumber(widthInput.text);
+            var heightValue = parseNumber(heightInput.text);
+
+            if (isNaN(widthValue) || widthValue <= 0) {
+                showMessage("请输入有效的画布宽度。");
+                widthInput.active = true;
+                return;
+            }
+
+            if (isNaN(heightValue) || heightValue <= 0) {
+                showMessage("请输入有效的画布高度。");
+                heightInput.active = true;
+                return;
+            }
+
+            resultWidth = Math.round(widthValue);
+            resultHeight = Math.round(heightValue);
+        }
+
+        dialog.close(1);
+    };
+
+    cancelButton.onClick = function () {
+        dialog.close(0);
+    };
+
+    updateControlState();
+
+    if (dialog.show() !== 1 || resultWidth === null || resultHeight === null) {
+        return;
+    }
+
+    try {
+        document.resizeCanvas(
+            new UnitValue(resultWidth, "px"),
+            new UnitValue(resultHeight, "px"),
+            AnchorPosition.MIDDLECENTER
+        );
+    } catch (error) {
+        showMessage("修改画布失败：\n" + error.message);
+    }
+}());