X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/0c472ad198d1f3bb31ea8ec6710a60c1cf8ffda3..a2e7b5db56a1bc61d90ea2c74e9961fcafd46218:/app/helpers/svg_helper.rb

diff --git a/app/helpers/svg_helper.rb b/app/helpers/svg_helper.rb
index f2e02f742..62b39bf67 100644
--- a/app/helpers/svg_helper.rb
+++ b/app/helpers/svg_helper.rb
@@ -1,8 +1,59 @@
 module SvgHelper
-  def solid_svg_image_tag(width, height, fill, **options)
-    svg = "<svg xmlns='http://www.w3.org/2000/svg' width='#{width}' height='#{height}'>" \
-          "<rect width='100%' height='100%' fill='#{fill}' />" \
-          "</svg>"
-    image_tag "data:image/svg+xml,#{u(svg)}", **options
+  def previous_page_svg_tag(**options)
+    adjacent_page_svg_tag(dir == "rtl" ? 1 : -1, **options)
+  end
+
+  def next_page_svg_tag(**options)
+    adjacent_page_svg_tag(dir == "rtl" ? -1 : 1, **options)
+  end
+
+  def key_svg_tag(**options)
+    border_width = options["border"] ? (options["border-width"] || 1) : 0
+    rect_attrs = {
+      :width => "100%",
+      :height => "100%",
+      :fill => options["fill"] || "none"
+    }
+    if border_width.positive?
+      rect_attrs[:x] = rect_attrs[:y] = format("%g", 0.5 * border_width)
+      rect_attrs[:width] = options["width"] - border_width
+      rect_attrs[:height] = options["height"] - border_width
+    end
+    svg_attrs = options.slice("width", "height", "opacity", :class)
+
+    tag.svg(**svg_attrs) do
+      horizontal = "H#{options['width']}"
+      concat tag.rect(**rect_attrs, **stroke_attrs(options, "border")) if options["fill"] || options["border"]
+      if options["line"]
+        y_middle = format("%g", 0.5 * options["height"])
+        concat tag.path(:d => "M0,#{y_middle} #{horizontal}", **stroke_attrs(options, "line"))
+      end
+      if options["casing"]
+        casing_width = options["casing-width"] || 1
+        y_top = format("%g", 0.5 * casing_width)
+        y_bottom = format("%g", options["height"] - (0.5 * casing_width))
+        concat tag.path(:d => "M0,#{y_top} #{horizontal} M0,#{y_bottom} #{horizontal}", **stroke_attrs(options, "casing"))
+      end
+    end
+  end
+
+  private
+
+  # returns "<" shape if side == -1; ">" if side == 1
+  def adjacent_page_svg_tag(side, **options)
+    count = options[:count] || 1
+    height = options[:height] || 15
+    pad = 2
+    segment = (0.5 * height) - pad
+    width = (segment + (2 * count * pad)).ceil
+    angled_line_data = "l#{side * segment},#{segment} l#{-side * segment},#{segment}"
+    path_data = Array.new(count) { |i| "M#{side * ((2 * i) + 1) * pad},#{pad} #{angled_line_data}" }.join(" ")
+    path_tag = tag.path :d => path_data, :fill => "none", :stroke => "currentColor", :"stroke-width" => 1.5
+    view_box = "#{-width} 0 #{width} #{height}" if side.negative?
+    tag.svg path_tag, :width => width, :height => height, :viewBox => view_box, :class => options[:class]
+  end
+
+  def stroke_attrs(attrs, prefix)
+    attrs.select { |key| key.start_with?(prefix) }.transform_keys { |key| key.delete_prefix(prefix).prepend("stroke") }
   end
 end