support tight_bbox for pgf output, fixes matplotlib#2342

Author: pwuertz

lib/matplotlib/backends/backend_pgf.py

@@ -392,7 +392,7 @@ def get_width_height_descent(self, text, prop):
 
 class RendererPgf(RendererBase):
 
-    def __init__(self, figure, fh):
+    def __init__(self, figure, fh, dummy=False):
         """
         Creates a new PGF renderer that translates any drawing instruction
         into text commands to be interpreted in a latex pgfpicture environment.
@@ -410,6 +410,13 @@ def __init__(self, figure, fh):
         # get LatexManager instance
         self.latexManager = LatexManagerFactory.get_latex_manager()
 
+        # dummy==True deactivate all methods
+        if dummy:
+            nop = lambda *args, **kwargs: None
+            for m in RendererPgf.__dict__.keys():
+                if m.startswith("draw_"):
+                    self.__dict__[m] = nop
+
     def draw_markers(self, gc, marker_path, marker_trans, path, trans, rgbFace=None):
         writeln(self.fh, r"\begin{pgfscope}")
 
@@ -743,6 +750,11 @@ def get_default_filetype(self):
         return 'pdf'
 
     def _print_pgf_to_fh(self, fh, *args, **kwargs):
+        if kwargs.get("dryrun", False):
+            renderer = RendererPgf(self.figure, None, dummy=True)
+            self.figure.draw(renderer)
+            return
+
         header_text = """%% Creator: Matplotlib, PGF backend
 %%
 %% To include the figure in your LaTeX document, write
@@ -799,6 +811,7 @@ def print_pgf(self, fname_or_fh, *args, **kwargs):
         rendered in latex documents.
         """
         if kwargs.get("dryrun", False):
+            self._print_pgf_to_fh(None, *args, **kwargs)
             return
 
         # figure out where the pgf is to be written to
@@ -861,6 +874,10 @@ def print_pdf(self, fname_or_fh, *args, **kwargs):
         """
         Use LaTeX to compile a Pgf generated figure to PDF.
         """
+        if kwargs.get("dryrun", False):
+            self._print_pgf_to_fh(None, *args, **kwargs)
+            return
+
         # figure out where the pdf is to be written to
         if is_string_like(fname_or_fh):
             with open(fname_or_fh, "wb") as fh:
@@ -894,6 +911,10 @@ def print_png(self, fname_or_fh, *args, **kwargs):
         """
         Use LaTeX to compile a pgf figure to pdf and convert it to png.
         """
+        if kwargs.get("dryrun", False):
+            self._print_pgf_to_fh(None, *args, **kwargs)
+            return
+
         if is_string_like(fname_or_fh):
             with open(fname_or_fh, "wb") as fh:
                 self._print_png_to_fh(fh, *args, **kwargs)
@@ -903,7 +924,7 @@ def print_png(self, fname_or_fh, *args, **kwargs):
             raise ValueError("filename must be a path or a file-like object")
 
     def get_renderer(self):
-        return RendererPgf(self.figure, None)
+        return RendererPgf(self.figure, None, dummy=True)
 
 
 class FigureManagerPgf(FigureManagerBase):

lib/matplotlib/tight_bbox.py

@@ -134,5 +134,5 @@ def process_figure_for_rasterizing(figure,
 _adjust_bbox_handler_d = {}
 for format in ["png", "raw", "rgba", "jpg", "jpeg", "tiff"]:
     _adjust_bbox_handler_d[format] = adjust_bbox_png
-for format in ["pdf", "eps", "svg", "svgz"]:
+for format in ["pgf", "pdf", "eps", "svg", "svgz"]:
     _adjust_bbox_handler_d[format] = adjust_bbox_pdf