slide_themes.py

# slide_themes.py
from pptx.util import Inches, Pt
from pptx.dml.color import RGBColor
from pptx.enum.text import PP_ALIGN

class SlideThemeManager:
    def __init__(self):
        # 16:9 簡報尺寸 (單位：英吋)
        self.slide_width = Inches(13.333)   # 16:9 寬度
        self.slide_height = Inches(7.5)     # 16:9 高度
        
        # 版型配置 - 重新設計，減少留白，增加多樣化配色，改善文字對比度
        self.themes = {
            "商務專業": {
                "bg_color": RGBColor(248, 252, 255),  # 更淺的藍白背景
                "title_color": RGBColor(8, 47, 91),   # 更深的藍色標題
                "text_color": RGBColor(33, 37, 41),    # 深黑文字，提高對比度
                "accent_color": RGBColor(52, 144, 220), # 藍色強調
                "secondary_color": RGBColor(255, 255, 255), # 純白輔助背景
                "content_bg_color": RGBColor(255, 255, 255), # 內容框背景色
                "layout": "image_right",
                "has_gradient": True,
                "gradient_start": RGBColor(248, 252, 255),
                "gradient_end": RGBColor(235, 245, 255),
                # 縮小邊距，擴大內容區域
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 1.3, "width": 6.8, "height": 5.9},
                "image_area": {"left": 7.2, "top": 1.3, "width": 5.9, "height": 4.8}
            },
            "科技創新": {
                "bg_color": RGBColor(18, 28, 42),      # 深藍黑背景
                "title_color": RGBColor(120, 255, 235), # 更亮的青綠標題
                "text_color": RGBColor(245, 248, 252),  # 更亮的淺色文字
                "accent_color": RGBColor(255, 107, 107), # 紅色強調
                "secondary_color": RGBColor(35, 47, 62), # 深灰輔助
                "content_bg_color": RGBColor(35, 47, 62), # 內容框背景色
                "layout": "image_bottom",
                "has_gradient": True,
                "gradient_start": RGBColor(18, 28, 42),
                "gradient_end": RGBColor(35, 47, 62),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 1.3, "width": 12.9, "height": 3.2},
                "image_area": {"left": 0.2, "top": 4.7, "width": 12.9, "height": 2.6}
            },
            "創意設計": {
                "bg_color": RGBColor(255, 245, 250),   # 更淺的粉色背景
                "title_color": RGBColor(136, 14, 79), # 更深的紫色標題
                "text_color": RGBColor(33, 33, 33),    # 深黑文字，提高對比度
                "accent_color": RGBColor(255, 152, 0), # 橙色強調
                "secondary_color": RGBColor(255, 255, 255), # 純白輔助
                "content_bg_color": RGBColor(255, 255, 255), # 內容框背景色
                "layout": "image_left",
                "has_gradient": True,
                "gradient_start": RGBColor(255, 245, 250),
                "gradient_end": RGBColor(250, 224, 235),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 6.0, "top": 1.3, "width": 7.1, "height": 5.9},
                "image_area": {"left": 0.2, "top": 1.3, "width": 5.6, "height": 4.8}
            },
            "教育學術": {
                "bg_color": RGBColor(252, 255, 252),   # 更淺的綠白背景
                "title_color": RGBColor(46, 125, 50),  # 更深的綠色標題
                "text_color": RGBColor(33, 37, 41),    # 深黑文字
                "accent_color": RGBColor(255, 193, 7), # 黃色強調
                "secondary_color": RGBColor(255, 255, 255), # 純白輔助
                "content_bg_color": RGBColor(255, 255, 255), # 內容框背景色
                "layout": "image_top",
                "has_gradient": True,
                "gradient_start": RGBColor(252, 255, 252),
                "gradient_end": RGBColor(240, 248, 240),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 4.0, "width": 12.9, "height": 3.3},
                "image_area": {"left": 0.2, "top": 1.3, "width": 12.9, "height": 2.5}
            },
            "現代簡約": {
                "bg_color": RGBColor(255, 255, 255),   # 純白背景
                "title_color": RGBColor(33, 37, 41),   # 深黑標題
                "text_color": RGBColor(33, 37, 41),    # 深黑文字，提高對比度
                "accent_color": RGBColor(0, 123, 255), # 藍色強調
                "secondary_color": RGBColor(248, 249, 250), # 淺灰輔助
                "content_bg_color": RGBColor(248, 249, 250), # 內容框背景色
                "layout": "image_right",
                "has_gradient": False,
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 1.3, "width": 6.8, "height": 5.9},
                "image_area": {"left": 7.2, "top": 1.3, "width": 5.9, "height": 4.8}
            },
            "溫暖橙色": {
                "bg_color": RGBColor(255, 252, 245),   # 更淺的橙白背景
                "title_color": RGBColor(191, 54, 12),   # 更深的橙色標題
                "text_color": RGBColor(33, 37, 41),    # 深黑文字，提高對比度
                "accent_color": RGBColor(255, 138, 101), # 淺橙強調
                "secondary_color": RGBColor(255, 255, 255), # 純白輔助
                "content_bg_color": RGBColor(255, 255, 255), # 內容框背景色
                "layout": "image_bottom",
                "has_gradient": True,
                "gradient_start": RGBColor(255, 252, 245),
                "gradient_end": RGBColor(255, 243, 224),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 1.3, "width": 12.9, "height": 3.2},
                "image_area": {"left": 0.2, "top": 4.7, "width": 12.9, "height": 2.6}
            },
            "深邃紫色": {
                "bg_color": RGBColor(67, 18, 125),     # 深紫背景
                "title_color": RGBColor(224, 164, 234), # 更亮的淺紫標題
                "text_color": RGBColor(255, 255, 255), # 純白文字
                "accent_color": RGBColor(255, 204, 0), # 金黃強調
                "secondary_color": RGBColor(98, 26, 142), # 中紫輔助
                "content_bg_color": RGBColor(98, 26, 142), # 內容框背景色
                "layout": "image_left",
                "has_gradient": True,
                "gradient_start": RGBColor(67, 18, 125),
                "gradient_end": RGBColor(118, 30, 152),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 6.0, "top": 1.3, "width": 7.1, "height": 5.9},
                "image_area": {"left": 0.2, "top": 1.3, "width": 5.6, "height": 4.8}
            },
            "清新藍綠": {
                "bg_color": RGBColor(240, 255, 252),   # 更淺的藍綠背景
                "title_color": RGBColor(0, 105, 92),  # 更深的藍綠標題
                "text_color": RGBColor(33, 37, 41),    # 深黑文字
                "accent_color": RGBColor(255, 111, 97), # 珊瑚紅強調
                "secondary_color": RGBColor(255, 255, 255), # 純白輔助
                "content_bg_color": RGBColor(255, 255, 255), # 內容框背景色
                "layout": "image_top",
                "has_gradient": True,
                "gradient_start": RGBColor(240, 255, 252),
                "gradient_end": RGBColor(224, 242, 235),
                "title_area": {"left": 0.2, "top": 0.1, "width": 12.9, "height": 1.0},
                "content_area": {"left": 0.2, "top": 4.0, "width": 12.9, "height": 3.3},
                "image_area": {"left": 0.2, "top": 1.3, "width": 12.9, "height": 2.5}
            }
        }
        
        # 圖片風格
        self.image_styles = {
            "professional": "business professional corporate clean",
            "creative": "creative artistic colorful vibrant",
            "minimalist": "minimal clean simple white space",
            "modern": "modern contemporary sleek design",
            "natural": "natural outdoor organic environment",
            "technology": "technology digital modern tech innovation"
        }
    
    def get_theme(self, theme_name):
        """獲取指定主題"""
        return self.themes.get(theme_name, self.themes["商務專業"])
    
    def get_all_theme_names(self):
        """獲取所有主題名稱"""
        return list(self.themes.keys())
    
    def apply_background(self, slide, theme):
        """應用背景色彩或漸變"""
        try:
            # 獲取投影片背景
            background = slide.background
            fill = background.fill
            
            if theme.get("has_gradient", False):
                # 應用漸變背景
                fill.gradient()
                fill.gradient_angle = 45.0  # 45度角漸變
                
                # 設置漸變色彩停靠點
                gradient_stops = fill.gradient_stops
                gradient_stops[0].color.rgb = theme["gradient_start"]
                gradient_stops[1].color.rgb = theme["gradient_end"]
            else:
                # 應用純色背景
                fill.solid()
                fill.fore_color.rgb = theme["bg_color"]
        except Exception as e:
            print(f"應用背景錯誤: {e}")
    
    def add_decorative_elements(self, slide, theme):
        """添加裝飾性元素（邊框、圖形等）"""
        try:
            # 根據主題添加裝飾線條或圖形
            if theme.get("layout") == "image_right":
                # 在左側內容區域添加垂直裝飾線
                line = slide.shapes.add_connector(
                    connector_type=1,  # 直線
                    begin_x=Inches(0.1),
                    begin_y=Inches(1.3),
                    end_x=Inches(0.1),
                    end_y=Inches(7.2)
                )
                line.line.color.rgb = theme["accent_color"]
                line.line.width = Pt(4)
            
            elif theme.get("layout") == "image_bottom":
                # 在標題下方添加水平裝飾線
                line = slide.shapes.add_connector(
                    connector_type=1,  # 直線
                    begin_x=Inches(0.2),
                    begin_y=Inches(1.2),
                    end_x=Inches(13.1),
                    end_y=Inches(1.2)
                )
                line.line.color.rgb = theme["accent_color"]
                line.line.width = Pt(3)
                
        except Exception as e:
            print(f"添加裝飾元素錯誤: {e}")
    
    def format_title(self, shape, theme, font_size, font_getter=None):
        """格式化標題"""
        try:
            paragraph = shape.text_frame.paragraphs[0]
            if font_getter:
                paragraph.font.name = font_getter()
            else:
                paragraph.font.name = self.get_font_name()
            paragraph.font.size = Pt(font_size)
            paragraph.font.color.rgb = theme["title_color"]
            paragraph.alignment = PP_ALIGN.LEFT
            paragraph.font.bold = True
            
            # 為深色背景的主題添加陰影效果
            if self.is_dark_background(theme):
                try:
                    # 添加文字陰影增強可讀性
                    paragraph.font.color.rgb = RGBColor(255, 255, 255)
                except:
                    pass
        except Exception as e:
            print(f"格式化標題錯誤: {e}")
    
    def format_content(self, paragraph, theme, font_size, font_getter=None):
        """格式化內容"""
        try:
            if font_getter:
                paragraph.font.name = font_getter()
            else:
                paragraph.font.name = self.get_font_name()
            paragraph.font.size = Pt(font_size)
            paragraph.font.color.rgb = theme["text_color"]
            paragraph.space_before = Pt(6)
            paragraph.space_after = Pt(6)
            paragraph.line_spacing = 1.2
        except Exception as e:
            print(f"格式化內容錯誤: {e}")
    
    def get_font_name(self):
        """獲取中文字型名稱"""
        import os
        # 檢查是否有自定義中文字型檔案
        font_path = os.path.join(os.path.dirname(__file__), "cht.ttf")
        if os.path.exists(font_path):
            return "cht"
        else:
            return "Arial Unicode MS"
    
    def is_dark_background(self, theme):
        """判斷是否為深色背景"""
        bg_color = theme["bg_color"]
        # 計算亮度（簡單的RGB平均值判斷）
        # RGBColor 物件沒有 .r 屬性，需要使用 ._color_val 或直接從 RGB 值計算
        try:
            # 嘗試獲取 RGB 值
            r = bg_color._color_val & 0xFF
            g = (bg_color._color_val >> 8) & 0xFF  
            b = (bg_color._color_val >> 16) & 0xFF
            brightness = (r + g + b) / 3
            return brightness < 128
        except:
            # 如果無法獲取，使用保守判斷
            # 檢查是否為已知的深色主題
            dark_themes = ["科技創新", "深邃紫色"]
            theme_name = getattr(theme, 'name', '')
            return theme_name in dark_themes
    
    def setup_slide_background_and_layout(self, slide, theme):
        """設置投影片背景和基本布局"""
        # 應用背景
        self.apply_background(slide, theme)
        
        # 添加裝飾元素
        self.add_decorative_elements(slide, theme)
    
    def create_content_box_with_background(self, slide, theme, content_area):
        """創建帶背景的內容框"""
        try:
            # 在內容區域添加背景框
            bg_shape = slide.shapes.add_shape(
                1,  # 矩形
                Inches(content_area["left"] - 0.1),
                Inches(content_area["top"] - 0.1),
                Inches(content_area["width"] + 0.2),
                Inches(content_area["height"] + 0.2)
            )
            
            # 設置背景框樣式
            fill = bg_shape.fill
            fill.solid()
            
            # 使用主題中定義的內容背景色
            if "content_bg_color" in theme:
                fill.fore_color.rgb = theme["content_bg_color"]
            else:
                # 回退邏輯
                if self.is_dark_background(theme):
                    fill.fore_color.rgb = RGBColor(40, 40, 40)  # 深色背景用深灰框
                else:
                    fill.fore_color.rgb = RGBColor(255, 255, 255)  # 淺色背景用白色框
            
            # 設置邊框
            bg_shape.line.color.rgb = theme["accent_color"]
            bg_shape.line.width = Pt(2)
            
            # 對於深色背景，增加透明度
            if self.is_dark_background(theme):
                fill.transparency = 0.2  # 20% 透明度
            else:
                fill.transparency = 0.05  # 5% 透明度
            
            return bg_shape
        except Exception as e:
            print(f"創建內容背景框錯誤: {e}")
            return None