Add option to customise font size in detail pane

[delphidabbler]

Following implementation of customisable font size for overview pane tree view (see issue #7), it remains 5o allow for customisation of the font size for detail pane, as was suggested by the IP of issue #7.

[delphidabbler]

@PeterPanino - this is still on the todo list!

[delphidabbler]

Think I've worked out how to do this - needs some testing.

[PeterPanino]

I can test it for you.

[delphidabbler]

Cheers @PeterPanino Couldn't sleep last night so ended up browsing source code on my tablet! Think I know what to do now.

[delphidabbler]

The TDetailViewFrame.BuildCSS method in the FrDetailView unit is probably where the font size needs to be set from Preferences.

Need to set font size in the following CSS:

• body
• table
• h1
• h2
• .active-text h2
• .snippet-list .active-text h2
• #newtab

Need to give some thought to whether to simply add a constant size for larger fonts (like h1 for e.g.) or whether to scale them up proportionately).

[delphidabbler]

Not sleeping again!

Here's some suggested code for TDetailViewFrame.BuildCSS that might do the job.

Add new ContentFont object:

var
  ContentFont: TFont;
  ...
begin
  ContentFont := nil;
  CSSFont := TFont.Create;
  try
    ContentFont := TFont.Create;
    TFontHelper.SetContentFont(ContentFont);
    ContentFont.Size := Preferences.xxxxx;
     ...
  finally
    ContentFont.Free;
    ...
 end;
end;

Then whenever we have the statement

TFontHelper.SetContentFont(CSSFont);

Replace it with

CSSFont.Assign(ContentFont);

And if we decide to scale heading fonts, use something like this:

var
  FontScaleFactor: Single;
...
begin
  ...
  FontScaleFactor  := 1.0 / ContentFont.Size;
  ...
  CSSFont.Size := CSSFont.Size + Max(
    Round(CSSFont.Size * FontScaleFactor * Increment),
    Increment
  );
  ...
end;

Where

• FontScaleFactor is the amount we increase a font size by to get proportionally the same growth as adding 1 to the default content font size.
• Increment is the number of point sizes the content font size was originally increased by.